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produ ct manual cheet a h 15k.5 scsi 1 003 84 776 re v . j may 2010 st3 30065 5l w st3 14685 5l w st3 73455 l w st3300655lc st3146855lc st373455lc http://
? 2010, seagate technology llc all rights reserved. publication number: 100384776, rev. j may 2010 seagate, seagate technology and the wave logo are registered trademarks of seagate technology llc in the united states and/or other countries. cheetah, seatools and seatdd are either trade - marks or registered trademarks of seagate technology llc or one of its affiliated companies in the united states and/or other count ries. all other trademarks or registered trademarks are the property of their respective owners. no part of this publication may be reproduced in any form without written permission of seagate technology llc. call 877-pub-tek1(877-782-8651) to request permission. one gigabyte, or gb, equals one billi on bytes when referring to hard dr ive capacity. accessible capacity may vary depending on operating environment and form atting. quantitative usage examples for various applications are for illustrative pur poses. actual quantities will vary based on various fa ctors, including file size, file format, features and application software. seagate reserves the right to change, without notice, product offerings or specifications.
cheetah 15k.5 scsi product manual, rev. j i contents 1.0 seagate technol o gy support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3.0 applicab le s t a nda rds an d ref e re nce d o cume nta t ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1 standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1.1 electromagnetic c o mpatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.1.2 electromagnetic s u s c eptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3.2 electromagnet i c c o mpliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3 eur o p ean un ion restriction of haza rdous subs tances (rohs) . . . . . . . . . . . . . . . . . . . . . 4 3.4 referenc e documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4.0 general descripti o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.1 standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 media charac terist ics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 performanc e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.5 formatt e d c a pac i ties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.5.1 programmable drive capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.6 fac t ory inst alled ac cessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.7 options (factory ins t alled) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.8 acc e ss ories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.0 performance characteri s tics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 inter n a l d r ive char acter i stics ( t r a n s p a r ent to user ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.2 scsi performance c h aract e ristics (visible to us er) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.2.1 seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2.2 format command execution time (minutes) [1] . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2.3 generaliz ed performanc e charact e ristic s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.3 start / st op time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.4 prefetc h / m ulti-segmented cache cont rol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.5 cache operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.5.1 caching write dat a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.5.2 prefetc h operat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6.0 reliabili ty specifi cations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1 error rat e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1.1 re co ve ra ble er ro rs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1.2 un re co ve ra ble er ro r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6.1.3 seek errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2 reliability and serv ice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2.1 annu a lize d failu re rate ( a fr) an d mea n time be twee n failu re s ( m tbf) . . . 15 6.2.2 preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 6.2.3 hot plug gin g cheetah 15k.5 scsi disc drives. . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.2.4 s.m.a. r.t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6.2.5 thermal monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.2.6 drive self test (dst) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.2.7 produc t w arranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7.0 physical/electrical speci f ications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.1 ac power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.2 dc power requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.2.1 conducted noise immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 7.2.2 power s e quencing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 7.2.3 current prof ile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 7.3 power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ii cheetah 15k.5 scsi product manual, rev. j 7.4 environmental limit s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.1 temperat ure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.2 relat i ve humidit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.3 eff e c t ive altitude (sea lev e l) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 7.4.4 shoc k and v i brat ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 7.4.5 air cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 7.4.6 corros ive environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 7.4.7 acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 7.4.8 electromagnetic s u s c eptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 7.5 mec h anic al specif ications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 8.0 defect and error management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 8.1 drive int e rnal defec ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 8.2 dr ive er ro r re co ve ry pr oc ed u r e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 8.3 scsi sy stems errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 8.4 background media scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 8.5 media pre-s c an . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 8.6 de fe rr ed au to -r ea lloc a t i on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 8.7 idle read af ter write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 9.0 installati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 9.1 drive id/ o ption selec t header . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 9.1.1 notes f o r figures 10 and 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 9.1.2 function des c ription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 9.2 drive orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 9.3 cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 9.4 drive mount i ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 9.5 grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 10.0 interface requi r ements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 10.1 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 10.2 scsi interface mes sages supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 10 .3 scsi interface commands support e d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 10.3.1 inquiry vital p r oduct data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 10.3.2 mode sense data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 10 .4 scsi b u s co nd itio ns a n d m i sc ella ne o u s fe at ur es su p p ort e d . . . . . . . . . . . . . . . . . . . . . . . 55 10.5 synchronous data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 10.5.1 synchronous data transfer periods s u pported . . . . . . . . . . . . . . . . . . . . . . . . . . 56 10.5.2 req / ac k offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 10.6 physical interf ac e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 10.6.1 dc cable and c o nnect o r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 10.6.2 scsi interface phy sical des cription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 10.6.3 scsi inter f ace cable r e q u ir eme n ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 10.6.4 mat i ng connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 10.7 electrical desc ription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 10.7.1 mult imode? se and lvd alt e rnativ es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 10.8 terminator requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 10.9 terminator power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 10.10 disc drive sc si t i ming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 10.11 drive ac tivit y led . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
cheetah 15k.5 scsi product manual, rev. j iii list of figures figure 1. typical st3300655lw drive +5 v lvd current profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 2. st3300655lc dc current and power vs. iops (lvd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 3. st3146855lc dc current and power vs. iops (lvd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 figure 4. st373455lc dc current and power vs. iops (lvd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 figure 5. locations of the hda temperature check point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 figure 6. recommended mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 figure 7. lw mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 figure 8. lc mounting configuration dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 figure 9. j5 jumper header (on lw models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 figure 10. j6 option select header (on lw models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 figure 11. air flow (suggested) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 figure 12. lw model drive physical interface (68-pin j1 scsi i/ o connector) . . . . . . . . . . . . . . . . . . . . . 57 figure 13. lc model drive physical interface (80-pin j1 scsi i/o connector) . . . . . . . . . . . . . . . . . . . . . 58 figure 14. scsi daisy-chain interface cabling for lw drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 figure 15. nonshielded 68-pin scsi device connector used on lw drives . . . . . . . . . . . . . . . . . . . . . . . 62 figure 16. nonshielded 80-pin scsi sca-2 connector used on lc dr ives . . . . . . . . . . . . . . . . . . . . . . . 63 figure 17. typical se-lvd alternative transmitter receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

cheetah 15k.5 scsi product manual, rev. j 1 1.0 seagate technology support services seagate online support and services for information regarding products and services, visit http://www.sea gate.com/www/en-us/ about/contact_us/ a v aila ble ser v ices includ e: pr esales & t e ch nical supp or t globa l su ppo rt ser v ices te lep hon e nu mbe r s & bu siness h o u r s auth orize d se rvice center s fo r infor m a t io n re gar din g w a r r a n ty sup por t, visi t ht tp:// www . s ea gate.com/www/en-us/ support/warranty_&_ returns_assistance for information regarding data recovery services, visit http://www.i365.com for seagate oem & distribution partner portal, visit https://direct.sea gate.com/portal/system for seagate reseller portal, visit http://spp.sea gate.com
2 cheetah 15k.5 scsi product manual, rev. j 2.0 scope th is ma nu al describ es se ag ate ? t e ch nolo g y llc, ch eet a h ? 15k.5 scsi disc d r ives. ch ee t a h 1 5 k .5 s c si d r iv es su pp or t th e sm all c o m p ut er sys te m in te rf ac e ( s csi ) a s d e sc rib e d in th e an si scsi spi- 4 int e r fa c e sp ec if ica tio ns to th e ex ten t de scr ibe d in th is m a nu al. t h e scsi inter f a c e m anu al (p ar t number 100293069) des c ribes general scsi interf ac e characteris t ics of this and other familie s of seagate dr ive s . from th is po int on in th is p r o duct man ual the refe ren c e to ch ee t ah 1 5 k.5 scsi mod e ls is r e fer r e d to as ?th e d r ive? u n le ss re fe re nces to in dividu al mod e ls a r e n e cessar y .
cheetah 15k.5 scsi product manual, rev. j 3 3.0 applicable standards an d reference documentation the drive has been dev e loped as a syst em peripheral to the highest st anda rds of design and const r uction. the d r ive dep en ds up on it s ho st equ ipme nt to pr ovide ad equ ate power a nd en vir o n m en t in o r d e r to achieve op ti- mu m p e r f o rma nce and comp lian c e with a pplicab le indu str y and go vern men t al reg u la tio n s. s pecia l attention mu st be given in the a r ea s o f safe ty , po we r d i strib u tion , shie ldin g, aud ible n o ise con t r o l, an d temp era t ure re gu- la tio n . in p a rticu l ar , the dr ive mu st b e secu rely m oun t ed in o r d e r to g uar an te e the spe c ified pe rfor ma nce cha r - acteristics. mounting by bottom holes mu st meet the requirements of section 9.4. 3.1 standards t h e ch ee t a h 1 5 k .5 scsi fa m i ly co m p lie s w i t h sea g a te s t an da rd s as no te d in t h e a p p r o p r ia te se ctio ns of th is ma nu al, the se aga te pa ra llel scsi in te rface ma nua l , p a r t nu mbe r 10 02 930 69, an d th e scsi commands ref- e r en ce man ual , p a rt nu mbe r 10 029 306 8. the cheetah 15k.5 scsi disc drive is a ul recognize d component per ul1950, csa certified to csa c22.2 no. 950-95, and vde or tuv certified to en60950. 3.1.1 electromagnetic compatibility th e d r ive, as d e liver ed, is de signe d for system in te gr ation and inst al lation in to a su it able en clo s u r e pr ior to u s e . as su ch the dr ive is sup p lie d a s a su bassemb ly an d is n o t sub j ect to sub p art b of par t 15 of the fcc rule s a nd re gula t io ns no r the rad i o inter f ere n ce reg u latio n s of th e cana dia n dep a r t m ent of commu nica- tions . the design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable shielding. as such, the drive is capable of meeting the class b limits of the fcc rules and regula- tions of the canadian department of communications wh en properly packaged. however, it is the user?s responsibility to assure t hat the drive meets the appropriate emi re quirements in their system. shielded i/o cables may be required if the enclosure does not provid e adequate shielding. if the i/o cables are external to the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con- troller. 3.1.2 electromagnetic susceptibility as a component assembly, the drive is not required to meet any suscepti bility performance requirements. it is the responsibility of those in tegrating the drive within their systems to perform those tests required and design their system to ensure that equipment operating in the same system as th e drive or external to the system does not adversely affect the pe rformance of the drive. see table 3, dc power requirements.
4 cheetah 15k.5 scsi product manual, rev. j 3.2 electromagnetic compliance sea g a t e uses an ind epe nde nt lab o r a tor y to co nfirm co mplia nce to the dir e ctive s /st and ar d( s) for ce ma rkin g a nd c- t i ck mar k in g. th e dr ive was teste d in a r epr esen t a tive sys tem f o r typical applicat ions. the s e lect ed sys - tem represents the most popular characteristics for test platforms. the system configurations include: ? typical current use microprocessor ? 3.5-inch floppy disc drive ? keyboard ? monitor/display ? printer ? external modem ?mouse although the test system with this seagate model complie s to the directives/standard (s), we cannot guarantee that all systems will comply. the co mputer manufactur er or system inte grator shall conf irm emc compliance and provide ce marking and c-tick marking for their product. electromagnetic compliance for the european union if this model has the ce marking it complies with th e european union requirements of the electromagnetic compatibility directive 89/336/ eec of 03 may 1989 as am ended by directive 92/31/ eec of 28 april 1992 and directive 93/68/eec of 22 july 1993. australian c-tick if this model has the c-tick markin g it complies with the australia/new zealand standard as/nzs3548 1995 and meets the electromagnetic compatibility (emc) fr amework requirements of au stralia?s spectrum man- agement agency (sma). korean mic if this m o d e l ha s t h e ko re an m i nis try of infor m ation and co mmu nication (mi c) logo, it comp lie s with p a ra gr ap h 1 of article 1 1 of the electromagnet ic comp atibility (emc) co ntrol regulation and me et s the electromagnetic comp atibility framework requir ement s of the r a dio research laborato ry (rr l ) ministry of inform ation and communic ation republic of korea. this drive has been tested and comp lies with the electromagnet ic interference/elec tr omagnetic susceptibility ( e mi/ems) fo r class b pro d u c t s . taiwanese bsmi if this model has the chinese national standard (cns) 13438 marking, it complies with chinese national stan- dard (cns) 13438 and meets the el ectromagnetic compatibility (emc) fr amework requirements of the tai- wanese bureau of standards, metrology, and inspection (bsmi). 3.3 european union restriction of hazardous substances (rohs) t h e eu ro pe a n u n io n r e s tric tio n o f h a z a r d o u s su bs t a n c e s (r oh s) d i re ctiv e r e s tric t s th e pr es en ce o f ch em ic al substances, in clu d in g lea d (pb ) , in ele c tro n ic pr odu ct s ef fective july 200 6. a nu mbe r of p a rt s and mater i als in seag ate pr od uct s a r e p r ocu r ed fr om exter n a l sup p lie rs. w e r e ly o n the r ep- r e sen t ations o f ou r su pplie rs r e g a r d ing the pr esen ce of rohs sub s t ances i n the s e p a r t s an d ma teria l s. our su pp lie r co ntr a ct s re qu ir e co mp lia nc e with ou r ch e m ic al su bs t a n c e r e str i ctio ns , an d o u r sup p lier s do cu m e n t the i r comp liance with ou r re quir e m ent s by pr oviding mater i al conten t d e clar ations for a ll p a r t s a n d ma teria l s for the d i sc dr ives d o cum ented in th is p ublicatio n. cur r e n t su pp lier d e clar ations includ e disclosur e of th e inclusio n of a n y ro hs- r e g u l a t ed s u b s t a nc e in suc h p a rt s or m a t e r i als .
cheetah 15k.5 scsi product manual, rev. j 5 seagate also has internal systems in place to ensure on going compliance with the rohs directive and all laws and regulations which restrict chemic al content in electronic products . these systems incl ude standard operat- ing procedures that ensure that re stricted substances are not utilized in our manufacturing operations, labora- tory analytical validation testing, and an internal au diting process to ensure that all standard operating procedures are complied with. 3.4 reference documents ch ee t a h 1 5 k .5 scs i inst allation g u ide seag ate p/n 10 038 477 7 safe ty and re gula t o r y agen cy spe c ification s seag ate p/n 75 789 512 scsi comm and s refer e n c e m anu al seag ate p/n 10 029 306 8 par a lle l scsi inte rface pro duct man ual seag ate p/n 10 029 306 9 app licable ansi sma ll com pute r system inter f ace (scsi) docu m en t nu mbe r s: t10/1143d enhanced scsi parallel interface (epi) t10/1416d primary commands-3 (spc-3) t10/1417d scsi block commands (sbc-2) t10/1157d scsi architectural model-2 (sam-2) t10/1365d spi-4 (scsi parallel interface version 4) sff - 84 51 s pecifica t ion for sca-2 unsh ielde d conn ectio n s packag e t e st s p e c ification s eag ate p/n 30 190 -0 01 ( und er 1 00 lb .) packag e t e st s p e c ification s eag ate p/n 30 191 -0 01 ( o ver 1 00 lb .) s p ecification, acous t ic t e st r e quirem ent s, a n d pr oced ure s seag ate p/n 30 553 -0 01 in case of conflict between this document and any referenced document, this document takes precedence.
6 cheetah 15k.5 scsi product manual, rev. j 4.0 general description che e t a h 15k.5 scsi dr ives co mbin e t u n n e ling ma gn et or esist i v e ( t mr) he ad s an d a wide ultra 32 0 scsi in te rface to pr ovide hig h p e r f o r m ance, h i gh cap a city d a t a sto r a ge fo r a var i ety of system s includin g eng inee r- in g wo rkst ation s , networ k ser v ers, main fr ame s , an d su pe rcomp u ter s . ultra320 sc si uses negotiated trans f er rates. these transf er rates will occur only if yo ur host adap ter support s th es e d a t a tr an sfe r r a t e s an d is c o m p a t ib le w i th t h e re qu ir ed ha rd wa re re q u ir em e n t s o f th e i/o circ uit t y p e . t h is drive als o operates at scs i -1 and scsi-2 dat a trans f er rates for backw ard comp atibility with non-ultra/ultra2/ ultra 160 /ultra 320 scsi h o st a dap ters. table 1 lists the features that differ entiate the cheetah 15k.5 scsi models. [1] see section 10.6 for details and definitions. th e dr ive reco rds an d re co ve rs da t a on ap pr oximate l y 70 m m non -r emo v a b le d i scs. th e dr ive sup por t s the sma ll com puter syste m in te rfac e (scsi) as d e scr i be d in the ansi scsi inter f a c e sp ec ifica tio ns to th e ex te nt de scr ib ed in th is m a nu al (vo l u m e 1 ) , wh ich de fin e s th e pr od u c t p e r fo r m a n c e ch ar - a c ter i stics o f th e ch ee t ah 15 k.5 scsi fa mily o f dr ives, th e parallel scsi interface manual , p a rt num ber 1 002 930 69 , an d th e scsi com m an ds refer e n c e ma nu al, p a r t nu mbe r 10 029 30 68, wh ich d e scr i be the g e n - eral interface characteris t ics of this and other families of seagate s c si drives. th e d r ive? s in te rface su pp ort s m u ltiple initiator s, d i sco nne ct/re conn ect, self- c o n figu rin g h o st so f t war e , a nd log- ical blo c k ad dr essin g . t h e h e a d an d disc as se mb ly ( hda ) is se ale d at th e fa cto r y . air circula t e s within th e hda thr oug h a n on- re pla ce a b le filt er to m a int a in a co nt a m ina tio n- fr ee h d a e n v i ro nm e n t . never disassemb le the hda an d d o no t atte mpt to ser v ic e ite m s in the se aled en clo s u r e (h ead s, me dia, a c tu- ator , etc.) as this requires special facilities. the drive c o nt ains no replac eabl e p a rt s. opening the h d a v o ids your warranty . che e t a h 15 k.5 scsi d r ives u s e a ded ica t e d la nd ing zo ne at the i nne rmo st r a d i us of the me dia to elimin ate th e poss ibility of destroying or degrading dat a by landing in the dat a zone . the drive automatic ally goes to the la ndin g zone whe n po we r is r e m o ved. t a ble 1: drive mod e l n u mber v s . d i f f e r ent i at in g f e a t ur es model number numbe r of ac tive h ead s i /o cir c u i t type [1 ] number of i/o co nn ec to r pin s st33 00 655 l w st31 46 855 l w st37 34 55l w 8 4 2 sing le- end ed ( s e) and lo w volt a g e dif f er ential ( l vd) 68 st33 00 655 lc st31 46 855 lc st37 34 55l c 8 4 2 sing le- end ed ( s e) and lo w volt a g e dif f er ential ( l vd) 80
cheetah 15k.5 scsi product manual, rev. j 7 an autom atic sh ippin g lo ck pr even t s poten tia l da mag e to the hea ds an d d i scs th at re sult s fr om movem ent du r- in g sh ippin g an d han dlin g. th e shipp i ng lo ck autom atica lly d i se nga ge s when p o wer is ap plied to the dr ive and the h ead load p r o c e s s be gins. a high-performance actuator assembly with a low-inerti a, balanced, patented, straight-arm design provides excellent performance with minimal power dissipation. 4.1 standard features the cheetah 15k.5 scsi family has the following standard features: ? perpendicular recording technology. ? integrated ultra320 scsi interface. ? multimode scsi drivers and receivers?single-ended (se) and low voltage differential (lvd) ? 16 bit i/o data bus ? asynchronous and synchronous data transfer protocol ? firmware downloadable via scsi interface ? selectable even byte sector sizes from 512 to 528 bytes/sector ? programmable sector reallocation scheme ? flawed sector reallocation at format time ? programmable auto write and read reallocation ? reallocation of defects on command (post format) ? ecc burst correction length of up to 400. ? sealed head and disc assembly ? no preventative maintenance or adjustment required ? dedicated head landing zone ? embedded servo design ? self diagnostics performed when power is applied to the drive ? zoned bit recording (zbr) ? vertical, horizontal, or top down mounting ? dynamic spindle brake ? 16,384 kbytes data buffer ? hot plug compatibility (section 10.6.4.2 lists proper host connector needed) for lc model drives ? drive self test (dst) ? supports scsi bus fairness 4.2 media characteristics the media used on the drive has an aluminum substrate co ated with a thin film magnetic material, overcoated with a proprietary prot ective layer for impr oved durability and envi ronmental protection.
8 cheetah 15k.5 scsi product manual, rev. j 4.3 performance ? supports industry standard ultra320 scsi interface ? programmable multi-segmentable cache buffer (see section 5.5 ) ? 15k rpm spindle. average latency = 2.0 msec ? command queuing of up to 64 commands ? background processing of queue ? supports start and stop commands (spindle stops spinning) 4.4 reliability ? annualized failure rate (afr) of 0.62% ? increased lsi circuitry integration ? incorporates industry-standard self-monitoring, analysis and reporting technology (s.m.a.r.t.) ? 5-year warranty 4.5 formatted capacities s t a nda rd oem m ode ls ar e for m atted to 512 bytes pe r b l ock. t he se ctor size is select a b le a t fo rma t tim e . use r s h a ving th e n e cessa r y e quip m en t may mo dify th e d a t a blo ck size be fo re issu ing a for m at com m an d an d o b t a i n d i f f er en t for m atted cap a cities th an those listed. t o provide a st able t a rget cap a city env i ronment and at the s a me time provide us ers w i th flexibility if they choose, seagate recommends product planning in one of two modes: 1. seagate designs specify capacity points at certain sector sizes that seagate guarantees current and future products will meet. we recommend customers use this capacity in their project planning, as it ensures a stable operating point with backward and forward compatibility from gene ration to genera tion. the current guaranteed operating points for this product are: 2. seagate drives also may be used at the maximum ava ilable capacity at a given sector size, but the excess capacity above the guaranteed leve l will vary between 10k and 15k fa milies and from ge neration to gener - ation, depending on how each sector size actually formats out for zone frequencies and splits over servo bursts. this added capacity potential may range from 0.1 to 1.3 percent above the guaranteed capacities listed above. using the drives in this manner gives th e absolute maximum capacity potential, but the user must determine if the extra capacity potential is us eful, or whether their assurance of backward and for - ward compatibility takes precedence. sector size st3300655lw st3300655lc ST3146855LW st3146855lc st373455lw st373455lc decimal hex decimal hex decimal hex 512 585,937,500 22ecb25c 286,749,488 11177330 143,374,744 88bb998 514 574,712,644 22416b44 282,050,768 10cfc0d0 141,025,384 867e068 520 573,653,847 22314357 280,790,184 10bc84a8 140,395,092 85e4254 522 570,053,000 21fa5188 279,041,740 10a1d6cc 139,463,602 8500bb2 524 566,007,800 21bc97f8 275,154,368 106685c0 137,577,184 83342e0 528 557,874,778 21407e5a 272,662,935 10408197h 136,331,467 82040cbh
cheetah 15k.5 scsi product manual, rev. j 9 4.5.1 programmable drive capacity using th e mo de se lect com m an d, th e d r ive can ch an ge it s cap a city t o s o mething les s than maximum. see the m o d e se lec t pa ra me te r l i st t a ble in th e scsi inter f ace m anu al . refer to th e pa ram e ter list block d e scr i ptor number of bloc ks field. a value of z e ro in the number of blocks f i eld indica tes that t h e drive shall not c h ange the cap a city it is c u rrently format ted to ha ve . a n u mb er in the n u mb er of blocks field that is less tha n th e maximu m number of lbas changes the tot a l driv e c a p a c i ty to the value in the bloc k desc riptor number of blocks f i eld. a valu e gr eate r th an the m a ximum n u mb er o f lbas is r oun ded d o wn to the ma xim u m cap a city . 4.6 factory installed accessories oem standard drives are shipped with the cheetah 15k.5 installation guide , part number 100384777, and the safety and regulatory agency specifications , part number 75789512 (unless otherwise specified). the factory also ships with the drive a small bag of jumper plugs us ed for the j5 and j6 option select jumper headers (on lw models only). 4.7 options (factory installed) all cus t omer requested opti ons are inc o rporat ed during production or p a ckaged at the ma nufacturing fac ility before shipping. some of the options available are (not an exhaustive list of possible options): ? other capacities can be ordered depending on sparing scheme and sector size requested. ? s ing l e un it shipp i ng p a ck. th e d r iv e is no rm a lly s h ip pe d in b u lk p a ck ag ing t o pr o v ide m a xim u m pr ot ec tion a gain s t tra n sit d a ma ge. unit s sh ipp ed in dividu ally req u ir e ad dition al pr otection a s p r o v id ed b y the sin g le u n it shipping pack. users planning single unit distribution should sp ecify this option. ?the cheetah 15k.5 installation guide , part number 100384777, usually ships with each standard oem drive. extra copies may be ordered. ?the safety and regulatory agency specifications , part number 75789512, usually ships with each standard oem drive. extra copies may be ordered. 4.8 accessories the following accessories are available. all accessories may be installed in the field. ? single unit shipping pack.
10 cheetah 15k.5 scsi product manual, rev. j 5.0 performance characteristics 5.1 internal drive characteristics (transparent to user) * one gbyte equals one billion bytes when referring to hard driv e capacity. accessible capacity may vary depending on operating environment and formatting. ** rounded off value. 5.2 scsi performance characteristics (visible to user) th e value s g i ve n in section 5.2.1 a pply to all mod e ls o f th e c h e e t ah 1 5 k. 5 scsi fa mily u n le ss ot he rw ise sp ec - ified. refer to the parallel scsi interface manual for additional timing details. st3300655lw st3300655lc ST3146855LW st3146855lc st373455lw st373455lc drive capacity 300.0 146.8 73.4 gbytes (formatted)* , ** read/write heads 8 4 2 tracks/surface (total) 74,340 74,340 74,340 tracks (user accessible) tracks/inch 125,000 125,000 125,000 tpi peak bits/inch 890k 890k 890k bpi areal density 110 110 110 gbits/inch 2 internal data rate 960 to 1607 960 to 1607 960 to 1607 mbits/sec (variable with zone) disc rotational speed 15k 15k 15k rpm average rotational latency 2.0 2.0 2.0 msec
cheetah 15k.5 scsi product manual, rev. j 11 5. 2. 1 s e e k t i me 5.2.2 format command execution time (minutes) [1] 5.2.3 generalized performance characteristics sust ainable disc transfer rate: scsi inte rface da t a tr an sfe r ra te ( a synchr o n ous) : synchr on ous tr an sfer ra te sector sizes: default 512 byte user data blocks variable 512 to 528 bytes per sector in even number of bytes per sector. if n (number of bytes per sector ) is odd, then n-1 will be used. notes for section 5.2 . [1] execution time measured from receipt of the last byte of the command descriptor block (cdb) to the request for a status byte transfer to the initiator (excluding connect/disconnect). [2] assumes no errors and no sector has been relocated. [3] assumes system ability to suppor t the rates listed and no cable loss. not including controller overhead (msec) 1 , 2 1. typical access times are measured under nominal conditions of temperature, volt - age, and horizontal orientation as measur ed on a representative sample of drives. 2. access to data = access time + latency time. read write average typical 3.5 4.0 single track typical 0.2 0.4 full stroke typical 6.8 7.5 st3300655lw st3300655lc ST3146855LW st3146855lc st373455lw st373455lc maximum (with verify) 120 90 60 maximum (no verify) 60 45 30 minimu m [3 ] 7 3 m byte s/sec maximu m [3 ] 125 m b yte s /sec maximu m i n st ant a n e ous one byte wid e 5 .0 mbytes/se c [3] maximu m i n st ant a n e ous two b y tes wi de 10.0 m bytes/se c [3] in lo w volt a ge d i f f er en tia l ( l vd) in terfa c e m ode 5.0 to 3 2 0 m bytes/se c read/write consecutive sectors on a track yes flaw reallocation performance impact (for flaws reallocated at format time using the spare sectors per sparing zone reallocation scheme) negligible average rotational latency 2.00 msec
12 cheetah 15k.5 scsi product manual, rev. j 5.3 start/stop time af ter dc po we r a t no mina l vo lt ag e ha s b een app lied , the d r ive b e come s r e a d y within 20 secon d s if the motor s t a r t op tio n is d i sa ble d ( i .e ., the mo to r st ar t s as soo n a s th e p o wer has b e e n ap plie d) . if a reco ve ra ble err o r co nd itio n is d e t ec te d d u r i ng th e st a r t se qu en ce , th e d r iv e e x e c u t e s a r e co ve ry pr oc ed ur e w h ich m a y c a u s e the time to becom e r ead y to exce ed 2 0 secon d s. du rin g spin up to re ad y t i me th e dr ive re sp on ds to so me co m - ma nd s over th e scsi inter f a c e in less th an 3 se co nds a f te r app lica t io n o f po we r . s t op tim e is 3 0 secon d s fro m remov a l of dc power . if the mo to r s t ar t op tion is e nab led, th e inter n a l con t r o lle r acce pt s th e co mma nds listed in the scsi inter f a c e pr odu ct man ual less th an 3 se cond s af ter dc po we r has b e e n a pplie d. af ter the mo to r s t a r t com m an d h a s b een r e ceive d th e dr ive becom es r e a d y fo r no rma l o p e r at io ns within 2 0 se cond s typically ( e xclud ing an err o r r e cover y p r o c e dur e) . th e mo to r s t ar t comm and ca n also be u s e d to co mma nd the d r ive to stop th e sp indl e ( s e e the scsi comm and s refer e n c e m anu al ). there is no power control switch on the drive. 5.4 prefetch/multi-segmented cache control th e dr ive p r o v id es p r e f e t ch (r ea d look- ahe ad ) and m u lti-seg m en te d ca ch e co ntro l a l gor ithms th at in ma ny cases ca n enh ance system pe rfor man c e . ? c a c h e ? a s used he r e in r e fer s to t h e d r iv e bu f f er s t or a g e s p a c e wh en it is u s e d in cach e o per ation s . t o sele ct p r e f e t ch an d cach e fea t u r e s the host sen d s the mo de select com m an d with the p r o per va lue s in th e ap plicable bytes in mod e pag e 08 h ( s e e the scsi inter f ace pro d u c t ma nua l ). pr efetch and cach e ope ra tio n ar e ind epe nde nt fe atur es fr om the st and p o int t h a t e a c h is en ab le d an d dis a b l ed ind e p e n d e n t l y v i a th e mo d e sele ct co m m a n d . ho we ve r , in ac tu al op e r a t io n th e pr ef et ch fe at ur e o v er la p s cache o p e r a t io n so mewha t a s is n o ted in se ctio n 5.5.1 an d sectio n 5.5.2. all d e fau l t ca ch e a n d pr efetch mo de p a ra mete r valu es ( m od e pa ge 08h ) fo r st a nda rd oem ve rsion s of this drive family are given in table 10. 5.5 cache operation note. refer to the scsi interface manual for more detail concerning the cache bits. of th e 16 mbytes p h ysica l bu f f e r sp ace in th e dr ive , ap pro x imately 1 3 ,00 0 kb ytes ca n b e used as a cache . th e bu f f er is div i de d int o lo g i ca l se gm e n t s fr om w h ic h da t a is r e a d a n d to w h ic h d a t a is wr itt e n . th e dr ive kee p s tr ack o f th e logica l bl ock ad dre s se s of th e d a t a sto r e d in each segm ent of the b u f f e r . if th e cache is en abl ed ( s e e rcd bit i n th e scsi in te rface m anu al ) , d a t a r equ ested by the ho st with a re ad com- ma nd is r e trie ve d fr om th e buf fer , if po ssib le, b e for e a n y dis c ac ces s is initiated. if cach e o p e r atio n is n o t enabled, the buf fer is still used , but only as circ ular buf f er s e gment s du ring disc medium re ad operations (dis - r e g a rd ing pr efetch op er ation for the mo men t ) . tha t is, the dr ive doe s n o t ch eck in th e bu f f er segm ent s for th e r e q uested r e a d dat a, b u t goe s d i re ctly to th e med i um to r e trie ve i t . the r e tr ieved d a t a m e re ly p a sses th ro ug h som e buf fer seg m en t on th e wa y to the ho st. all da t a tran sf er s to th e ho st ar e in ac co rd an ce w i th bu f f er -f ull r a tio r u le s. see the expla nation pr ovide d with the in for m ation ab ou t m ode pag e 02 h ( d iscon nect/r e con nect control) in the scsi in te rface ma nu al . the following is a simplified description of th e pr efetch/ca c h e op er ation: case a ?read command is received and all of the requ ested logical blocks are already in the cache: 1. drive transfers the requested lo gical blocks to the initiator. case b ?a read command requests data, and at least one r equested logical block is not in any segment of the cache: 1. t h e d r iv e fe tch e s the re qu e s te d lo gica l blo cks f r o m th e d i sc an d tr a n sf er s th em into a se gm e n t , an d th en from there to the host in accordance with the mode select disconnect/reconnect parameters, page 02h. 2. if the prefetch feature is enabled, refer to section 5.5.2 for operation from this point.
cheetah 15k.5 scsi product manual, rev. j 13 each cache segment is actually a self-contained circular buffer whose length is an integer number of logical blocks. the drive dynamically creates and removes se gments based on the workload. the wrap-around capa- bility of the individual s egments greatly enhances the ca che?s overall performance. note. the size of each segment is not reported by mode sense command page 08h, bytes 14 and 15. the value 0xffff is always reported regardless of the actual size of the segment. sending a size specification using the mode sele ct command (bytes 14 and 15) does not set up a new segment size. if the strict bit in mode page 00h (byte 2, bi t 1) is set to one, the drive responds as it does for any attempt to change an unchangeable parameter. 5.5.1 caching write data w r ite c a ch in g is a wr ite o p e r a t i on by t h e dr ive th at m a ke s us e o f a d r iv e b u f f e r st or ag e a r ea wh er e th e da t a t o b e wr itte n to th e med i um is stor ed while the drive p e r f o rms th e w r ite comm and . if re ad ca ch ing is en able d ( r cd=0) , th en dat a written to t he med i um is r e t a ined in th e cache to b e ma de avail- a b le fo r fu tu re r ead cache hit s . th e sam e b u f f er sp a c e an d se gme n t a tion is u s e d a s se t up for re ad functions. th e b u f f e r seg m en t a tion sche me is set up or ch an ged inde pe nde ntly , having no th ing to do with the st a t e of rcd . w h en a write command is is sued, if rcd=0, th e ca ch e is first che c ke d to see if any logi ca l b l ocks th at ar e to be writ te n ar e a l re ad y st or ed in th e ca ch e fr om a p r e v io us r e a d o r wr ite co m m a n d . i f th er e a r e , th e r e spe c tive ca che segm ent s ar e clear ed . th e new da t a is cache d fo r sub s e que nt re ad comm and s. if the n u mb er o f write da t a logica l b l ocks exceed the size of th e se gme n t b e in g wr itte n into, whe n the en d of th e seg m en t is r e a c h ed, the da t a is written in to the b egin n in g of the sa me ca che segm ent, o v erwr itin g the da t a th at was wr itte n th er e at th e beg inn i ng of th e op er ation; ho we ve r , th e dr ive doe s no t o v e r write d a t a that ha s no t yet be e n writ te n t o th e me d i um . if wr ite cachin g is en ab led ( w ce=1) , th en th e d r ive m a y re tu rn go od st a t u s o n a write com m an d af te r the dat a h a s b een tra n sfer red in to the cache , bu t be fore the d a t a ha s be en written to th e med i um. if a n er ror o c cu rs while wri t ing the dat a to the medium , and good st atus has al ready been re turned, a def erred error w ill be gen- er a t ed . th e syn c h r o n ize ca che comma nd ma y be u s e d to for c e th e dr ive to write all ca ched wr ite d a t a to th e med i um. upon c o mpletion of a sy nc hronize c a che command, all dat a re c e ived from prev ious w r ite c o mmands w ill have be e n writ te n t o th e me d i um . t a ble s 10 , 1 1 an d 12 s h o w t h e m o de d e f a u l t se ttin g s fo r th e dr ive . 5.5.2 prefetch operation if the pre f e t ch fea t u r e is e nab led, dat a in con t ig uou s lo g i ca l b l ocks on the disc imm edia t e l y be yo nd tha t wh ich was req u e s ted b y a read comm and a r e r e trie ve d and stor ed in the bu f f er for immed i ate tr an sfe r fr om the bu f- fer to the ho st o n su bsequ en t re ad co mma nds tha t re que st tho s e lo gical b l ocks ( t his is tru e e v e n if cach e op e r a t io n is disa b l ed ). t h ou gh th e pr ef et ch o p e r a t io n u s e s th e buf fer a s a ca ch e, fin d ing the r equ ested da t a in th e bu f f er is a p r efe t c h hit , n o t a ca ch e op e r a t io n h i t. t o ena ble pre f etch , use mod e se lect p age 0 8h, b y te 12 , bit 5 ( d isab le re ad ahe ad - dra b i t). dra bit = 0 e nab les pre f etch . the drive does not us e the max p r efetch field (bytes 8 and 9) or the prefetch c e iling field (bytes 10 and 1 1 ). whe n p r e f e t ch (r ea d lo ok-a hea d) is en able d ( e n able d b y dra = 0 ) , the dr ive en able s pr efetch o f co ntiguo us block s from the disc when it senses that a prefetch hit will likely occ u r . the drive di s a bles prefetch w h en it decides that a prefetch hit is not likely to occur.
14 cheetah 15k.5 scsi product manual, rev. j 6.0 reliability specifications the following reliability specif ications ass u me correct ho st/drive operationa l interface, includi ng all interface timings, power supply voltages, environmental requireme nts and drive mounting constraints (see section 9.4). note. [1] error rate specified with automatic retries and data correction with ecc enabled and all flaws reallocated. 6.1 error rates the error rates stated in this specification assume the following: ? the drive is operated per this specification usin g dc power as defined in this manual (see section 7.2 ). ? errors caused by host system failures are excluded from error rate computations. ? assume random data. ? default oem error recovery settings are applied. th is includes awre, arre, full read retries, full write retries and full retry time. 6.1.1 recoverable errors recove rab l e er ro rs ar e th ose de te cted and cor r e c te d by th e dr ive , an d do n o t r e q u ir e user in terve n tion. recoverable dat a errors w ill use corr ec tion, al though ec c on-the- fly is not considered for purpos es of rec o v - er ed e r ro r s p e c if ic at ion s . re co ver e d da t a e r r o r r a t e is de te rm in ed us ing r e a d b i t s tr an sfe r re d fo r re co ve ra b l e er ro rs o c c u r r in g d u r i ng a read, and using write bits transferred for recoverable errors occurring during a write. 6.1.2 unrecoverable error unr e cover a b l e dat a er ro rs (se n se key = 03h ) a r e sp ecifie d a t le ss than 1 secto r in er ror pe r 1 0 16 bit s tr an s- ferred. unrecoverable data errors resulting from the same cause are treated as 1 error for that block. se ek er r o rs le ss th an 1 0 in 10 8 seeks re ad er ror ra te s [ 1 ] recovered dat a l e ss tha n 10 er ro rs in 10 12 bit s tr an sf er re d (o em d e f a u l t s e t t in gs) unrecovered dat a le ss th an 1 s e c t or in 1 0 16 bit s tra n sfe r r ed ( o em de fa ult se tting s) miscorrec ted dat a le ss th an 1 s e c t or in 1 0 21 bit s transf erred an nu alized fa ilur e ra te (afr) 0 .6 2% pr even tive m a inten a n c e n on e re quir e d
cheetah 15k.5 scsi product manual, rev. j 15 6.1.3 seek errors a se ek er ro r is defin ed as a fa ilur e of the dr ive to p o si tion th e hea ds to th e a ddr essed track. after de te cting an in itia l see k er ro r , the d r ive auto m atically pe rfor ms a n er ro r re co ve ry p r o c e ss. if t h e e r r o r re co ve ry pr o c es s fa ils, a seek positioning error (e rror code = 15h or 02h) will be reported w i th a h a rdw a re error (04h) in the sens e key . re co ve ra ble see k e r r o r s a r e spe c ifie d at less th an 1 0 er ro rs in 10 8 seek s. unrecoverable seek errors ( s ense key = 0 4h) ar e cla s sified a s dr ive fa ilur e s. 6.2 reliability and service you can enhance the reliability of chee tah 15k.5 scsi disc drives by en suring that the dr ive receives ade- quate cooling. section 7.0 provides temperature meas urements and other information that may be used to enhance the service life of the drive. section 9.3 provides recommended air-flow information. 6.2.1 annualized failure rate (afr) and mean time between failures (mtbf) th ese dr ive s sha ll a c h i eve an afr of 0 . 6 2 % ( m tbf o f 1, 40 0,000 h o u r s) when o per at ed in a n envir onm ent th at e n sur e s the hda ca se tem per atur es do n o t e x ce ed the valu es spe c ifie d in section 7.4.1. oper ation at case temp er atur es ou t s ide th e s p e c if icat ion s in se ctio n 7 . 4 . 1 ma y in cr ea se th e af r (d ec re as e the m t bf). afr a nd mt bf st a t istics ar e po pula t io n st atistics tha t ar e no t r e leva nt to ind i vidua l u n it s. afr and mtbf specifications are ba sed on the following assumptions for enterprise storage system environ- ments: ? 8,760 power-on hours per year ? 250 average on/off cycles per year ? operating at nominal voltages ? system provides adequate cooling to ensu re the case temperatures specified in section 7.4.1 are not exceeded. 6.2.2 preventive maintenance no routine scheduled preventive maintenance shall be required.
16 cheetah 15k.5 scsi product manual, rev. j 6.2.3 hot plugging cheetah 15k.5 scsi disc drives th e ansi spi- 4 d o cume nt de fi nes the ph ysical r e q u ir eme n t s f o r r e mo va l an d in se rt ion of sc si d e v i c e s on the scsi b u s. f our cases ar e ad dre s se d. the ca se s a r e di f f e r e n tiated b y the st a t e of the scsi b u s wh en th e remov a l or ins e rtion oc curs. case 1 - all bu s d e vice s p o wer ed of f d u r i ng r e mo va l or in se rtion case 2 - rst signa l a s se rted con t inuo usly d u rin g re mo val or insertion case 3 - cur r ent i/o p r oce s ses no t allo we d du rin g inser t io n or r e m o val case 4 - cur r ent i/o p r oce s s allowe d dur ing in se rtion or r e mo va l, e x cep t o n th e device be ing cha nge d sea g a t e chee t ah 15k.5 scsi disc dri v e s sup p o r t all fo ur hot plu g g i ng ca se s. pr ovisio n sha ll be mad e b y th e system such that a device be ing inse rted ma ke s p o wer a nd gr ou nd conn ections pr ior to th e co nn ectio n of a n y d e vice sign al con t act to the bus. a d e vice be ing re mo ved sha ll main t a in po we r a n d gr ou nd co nne ctio ns af ter the discon nection of a n y d e vice sign al co nt act fro m th e bu s (s ee s f f - 84 51 s p e c if ic ation for sca-2 unshielded con nection s) . it is the respons i bility of the sy stems in tegrator to assure that no haz a rds from temper ature, energy , volt age, or esd po te nt ial ar e pr es en te d du rin g th e ho t co nn ec t/d isc o n n e c t o p e r a t io n. all i/o pr ocesses for the scsi de vice be ing inse rted or r e m o ved shall be q u iescent. all scsi d e vices o n th e b u s sha ll have r e ceiver s tha t confo rm to th e spi- 4 st and ar d. if the d e vice be ing ho t p l ugg ed u s e s sing le- end ed ( s e) dr ive r s and th e bus is cur r ently o p e r atin g in low vo lt ag e dif f e r e n t i al ( l vd) m o d e , th en all i / o pr oc es ses fo r a ll de vice s o n th e b u s mu st be co mp le te d, an d t h e b u s q u i - es ce d, b e f o r e a tte m p t i ng to h o t plu g . fo llow i ng th e inse rtion of the ne wly in st alled de vice , th e scsi host a dap te r m u st issue a bus re set, follo wed b y a synch r on ou s tra n sfer neg otiation . fa ilur e to p e rfo rm the scsi bus reset co uld r e sult in err o n eou s b u s o p e r atio ns. th e scsi bu s ter m ina t io n an d te rm ination p o wer so ur ce sha ll be exter n a l to the d e vice bein g inser t ed or re m o v e d . end user s shou ld no t mix devices with h i gh volt a ge dif f er en tia l ( h vd) d r iver s a n d r e ceiver s a nd de vice s with se, l v d, o r m u ltimod e d r iver s and r e ceiver s on th e sa m e scsi bus since th e co mmon mo de vo lt ag es in th e hvd e n viro nme n t m a y n o t be contr o lle d to safe le ve ls for se an d l v d devices (see ansi spi-4 ). th e d i sc dr ive spind l e mu st com e to a com p lete stop prio r to co mple te ly r e mo ving the dr ive fr om th e cabin e t cha s sis. use o f th e s t op s p indle comm and o r p a rtial wi th dra w al o f the dr ive , en oug h to be d i scon nected fro m the power sour ce, prio r to r e mo va l ar e me th ods for in surin g tha t this re qui rem ent is met. d u ring driv e insertion, care should be taken to avoid exceeding the limits stated in section 7.4.4, "shock and vibration" in this manual. 6.2.4 s.m.a.r.t. s.m.a.r.t. is an acronym for self-monitoring analysis and reporting te chnology. this technology is intended to recognize conditions that indicate drive degradation an d is designed to provide sufficient warning of a failure to allow data back-up before an actual failure occurs. note. the firmware will monitor specific attributes for degradat ion over time but ca nnot predict instanta - neous drive failures. each attribute monitors a specific set of conditions in the operating performance of the drive, and the thresh- olds are optimized to minimize ?false? predictions.
cheetah 15k.5 scsi product manual, rev. j 17 controlling s.m.a.r.t. th e ope ra tin g mod e of s.m.a.r.t . is contr o lled b y th e dexcpt bit a nd the perf bit of the ? i n f o r m a tiona l exception s co ntrol m ode page ? ( 1 ch) . t he dexcpt bit is us ed to en a b le o r d i sa ble th e s . m . a.r . t . pr oc es s. setting the dex c pt bit will dis a ble all s.m.a.r.t . func tions. w h en enabl ed, s.m.a.r.t . w ill collect on-line dat a a s the d r ive p e r f o rms no rma l re ad/write o per ation s . when th e per f bit is se t, th e d r ive is co n s id er ed to b e in ?on-line mode only? and will not perform of f-line functions. t h e pr oc ess of m e as ur ing of f-lin e a t t r ib ut es a n d sa vin g d a t a can be fo rc ed by t h e rez e r o un it co m m a n d . f o rc - ing s.m.a.r . t . will res e t the ti mer so that the next scheduled interrupt will be two hours . th e d r ive can be in te rr og ated b y the host to de te rmin e the tim e re main ing b e for e the next sche du led m easur e- ment and dat a logging process w ill occ u r . this is ac c o mplished by a log sens e co mmand to log p age 0x3e. th e pur po se is to allo w the custo m er to contr o l wh en s. m . a.r.t . in te rr up tio n s o c cur . as d e scr i be d abo ve , for c - ing s.m.a.r.t by the rezero un it command will reset the timer. performance impact s.m.a.r.t. attribute data will be saved to the disc for th e purpose of recreating the ev ents that caused a predic- tive failure. the drive will measure an d save parameters once every two hours subject to an idle period on the scsi bus. the process of measuring off-line attribute da ta and saving data to the disc is uninterruptable and the maximum delay is summarized below:: reporting control reporting is controlled in the informational exceptions control page (1ch). subject to the reporting method, the firmware will issue a 01-5d00 sense code to the host . the error code is preserve d through bus resets and power cycles. determining rate s.m.a.r.t . mon i to rs th e ra te a t which er ro rs occu r an d signa ls a pr ed ictive failur e if the r a te of deg ra de d err o r r a te incr eases to an u n a c cep t ab le level. t o dete rmin e ra te , e r r o r event s ar e log g e d and co mp ar ed to the n u m- b e r o f to t a l op er ations for a given attribu t e. the in terv a l define s the nu mbe r of op er ation s o v e r which to m ea- sur e the ra te . th e cou n ter th at ke ep s tr ack of th e cur r e n t num ber of op er ations is re fe rr ed to as th e inter v a l counter . s.m.a.r.t . me asur es er ro r r a te, he nce for ea ch attrib ut e the occurr en ce of an er ro r is r e cor ded . a co unter ke ep s t r a ck of th e nu m b e r of er ro r s fo r th e cu rr en t in te rv al. t h is co un te r is r e f e r r e d to a s t h e f a ilur e cou n t e r . er ro r rate is simp ly th e num ber o f er ro rs per o per ation . th e algo rithm that s.m.a.r.t . uses to re co rd r a t e s o f er ro r is to se t t h r e s h o l ds fo r t h e n u m b er of er ro rs an d th e in te rv al. if t h e n u m b er of er ro r s e xce ed s t h e th re sh o l d b e for e the in te rval expir e s, then the e r r o r r a te is co nsid e r ed to be un accept a b le. if the n u mb er of err o r s do es n o t excee d the thr e sho l d befor e th e inter v a l exp i res, the n th e e r r o r r a te is co nside r e d to be accep t able . in either case, the interval and failure counters are reset and the process starts over. predictive failures s.m.a.r.t. signals predictive failures when the drive is performing unacce ptably for a period of time. the firm- ware keeps a running count of the number of times the error rate for each attribute is unacceptable. to accom- plish this, a counter is incremented whenever the error rate is unacceptable and decremented (not to exceed max i mu m pr oce ssing de lay on- l in e only delay de xcpt = 0, perf = 1 fu lly- en abled de la y dexc pt = 0, perf = 0 s.m . a.r.t . delay times 42 mil lise c o nds 163 mil lisecon ds
18 cheetah 15k.5 scsi product manual, rev. j zero) whenever the error rate is acceptable. this counter is referred to as the failure history counter. there is a separate failure history counter for each attribute. should the counter co ntinually be incremented such that it reaches the predictive threshold, a predictive failure is signaled. 6.2.5 thermal monitor cheetah 15k.5 scsi drives implement a temperature warning system which: 1. signals the host if the temperature exc eeds a value which would threaten the drive. 2. signals the host if the temperature exceeds a user-specified value. 3. saves a s.m.a.r.t. data frame on the drive wh ich exceed the threatening temperature value. a temp er atur e sen s o r m onitor s th e d r ive tem per atur e a nd issue s a war n ing over the in te rface wh en th e tem- pe ra tu r e exc e e d s a s e t th re sh old . t h e t e m p er at ur e is m e as ur ed a t po we r- up a n d th en a t te n- min u t e in ter v a l s a f te r po we r- up . the t h ermal monit o r syst em generat e s a w a rning c o de of 01-0b01 when the temperature ex ceeds the spec i- fied lim it in comp liance with th e scsi st an da rd. the d r ive temp era t ure is re por ted in the fru cod e fie l d of mo de sense da t a . y o u ca n use th is infor m ation to dete rmi ne if t h e war n in g is d u e to th e t e m p er at ur e ex ce ed ing the d r ive thr eaten ing tem per atur e or t h e u s e r - s p e c i fied t e m p er at ur e. th is fe atur e is con t r o lle d b y th e ena b le w a r n ing ( e w a sc) bit, an d the re por ting mecha n ism is con t r o lle d b y th e me thod o f repo rting infor m a t io nal ex ce ption s fi eld (m rie) on the info r m a t io nal exce ption s contr o l (iec) mo de p a g e (1 ch ). t h e cu r r e n t a l go rit h m im p l em e n t s two t e m p er at ur e tr ip po int s . the first t r ip point is se t at 68 c which is th e ma ximum temp er atur e limit accor d in g to the d r ive specific a t i on. the secon d tr ip po int is user -sele c t a ble usin g th e l o g sele ct c o m m a nd . th e re fe re nc e te m p e r atu r e p a ra m e t e r in th e t e m p er at ur e lo g p a g e (s ee t a ble 2) can b e used to set th is tr ip po int. the defau lt va lue for this dr ive is 6 8 c , ho we ver , you ca n set it to any valu e in th e ra ng e o f 0 to 68 c . if yo u sp e c ify a t e m p er at ur e g r e a t e r th an 68 c in this field , th e te mpe r a t u r e is r oun de d d o wn to 68 c. a sen s e co de is se nt to the h o st to indic a te t h e rounding of the p a ramet e r field. whe n the fir s t tem per atur e tri p po int is exce ed ed, s.m.a.r.t . da t a is collect ed and a fra m e is saved to the d i sc. 6.2.6 drive self test (dst) drive self t e st ( d st ) is a techn o lo gy de si gne d to re co gn ize dr ive fa ult cond itions th a t qu alify the dr ive as a faile d un it. dst valid ates th e fu ncti ona lity of th e dr ive a t a system le ve l. there are two test coverage options implemented in dst: 1. extended test 2. short text th e m o st th oro u g h op tion is the extend ed te st tha t p e r f or ms var i o u s t e s t s on th e d r iv e a n d sca n s ev er y lo gic a l b l ock a ddr ess (l ba) of th e d r ive. the sh or t test is ti me -r estr icte d an d limited in len g th?it d oes no t scan th e e n tire m edia sur f ace, but doe s som e fu nda men t al test s a nd sca n s por tions of th e med i a. if dst en co un te rs an e r r o r d u r i ng e i th er o f the s e te st s, it r epo rt s a fault cond itio n. if the dr ive fails th e te st, remove it from service and retu rn it to seagate for service. t a ble 2: t e mpe r at ure lo g p a ge ( 0 dh) parameter code description 00 00h prim ary t e mp era t ure 00 01h refer ence t e mp er atur e
cheetah 15k.5 scsi product manual, rev. j 19 6.2.6.1 dst failure definition the drive will pres ent a ?diagnostic faile d? condition throu gh the self-tes t s result s va lue of the diagnostic log p a g e if a fun c tio nal failu re is encou nter ed dur ing dst . the chan nel and se rvo p a ram e ter s a r e no t m odified to test the dr ive mo re str i ng ently , an d th e n u mb er of r e trie s ar e n o t r edu ce d. all r e tr ies an d r e cover y pr ocesses are enabled during the test. if dat a is rec o verable, no failure condition will be reported regardle ss of the number o f re tries re qu ired to r e cover th e da t a . the following conditions are consid ered dst failure conditions: ? seek error after retries are exhausted ? track-follow error after retries are exhausted ? read error after retries are exhausted ? write error after retries are exhausted recovered errors will not be re ported as diagnostic failures. 6.2.6.2 implementation this section provides all of the information necess ary to implement the dst function on this drive. 6.2.6.2.1 state of the drive prior to testing th e d r ive m u st b e in a r ead y st a t e be fo re issui ng the sen d diagn ostic co mman d . the r e ar e mu ltiple r e a s o n s wh y a dr ive m a y no t b e read y , s o m e of which ar e v a lid c ond iti ons, and not er ro rs. for examp l e, a dr ive ma y b e in proces s of doing a format, or another dst . it is the re spons i bility of the host applic ation to determ ine the ?not r ead y? cause. while not technically pa rt of dst , a not re ad y cond itio n also qu alifies the d r ive to be re turn ed to seag ate as a failed driv e. a drive not rea d y co nditio n is r epo rted b y the d r ive un de r th e followin g co nditio n s: ? motor will not spin ? motor will not lock to speed ? servo will not lock on track ? drive cannot read configuration tables from the disc in these conditions, the drive responds to a test unit ready command with an 02 /04/00 or 02/04/03 code. 6. 2.6.2.2 invoking dst t o in vo ke dst , su bmi t the se nd dia gno stic comm and with the ap pro p r i ate fu nction cod e ( 001 b for th e sho r t test or 010 b for the e x te nde d test) in byte s 1, bit s 5, 6 , a nd 7 . re fe r to th e scsi com m an ds refere nce m anu al , p art number 100293068, for additional information about invoking dst. 6. 2.6.2.3 short and extended tests dst has two testing options: 1. short 2. extended th ese testin g op tio n s are describ ed in the following tw o subsections. each test consists of three segments: an electrical te st segment, a servo test segment, and a read/verify scan segment.
20 cheetah 15k.5 scsi product manual, rev. j short test (function code: 001b) th e p u rp ose o f the sh or t te st is to pr ovide a tim e - limited test th at test s a s m u ch o f the dr ive as possible with in 1 20 se co nd s. th e sh ort te st d oes n o t sca n th e e n tire med i a su rface, b u t do es some fun dam ent a l test s an d scans portions of the media. a c o mple te read/v erify sc an is not performe d and only factual failures will report a fault condition. this option provides a quick confidence test of the drive. extended test (function code: 010b) th e ob jective o f the e x ten ded te st optio n is to emp i rically test critical dr ive co mpo nen t s . for examp l e, th e se ek test s and on- track op era t i ons test the p o sitionin g me ch an ism . th e re ad o p e r atio n test s the rea d he ad e l eme n t a nd th e med i a su rface. t he wr ite e l eme n t is tested th r oug h rea d /write/r ead op er ation s . t he integ r ity of th e me dia is checked thro ug h a r ead /ver ify sc an o f th e m edia . motor fun c tion ality is teste d by de fa ult a s a p a r t of th es e tes t s. the anticipated length of the extended test is reported through the control mode page. 6.2.6.2.4 log page entries when the drive begins dst, it creates a new entry in th e self-test results log page . the new entry is created by inserting a new self-test parameter block at the beginni ng of the self-test results log parameter section of the log page. existing data will be moved to make room for the new parameter block. the drive reports 20 param- eter blocks in the log page. if ther e are more than 20 parameter blocks, the least recent parameter block will be deleted. the new parameter bloc k will be initialized as follows: 1. the function code field is set to th e same value as sent in the dst command 2. the self-test results value field is set to fh 3. the drive will store the log page to non-vo latile memory af ter a se lf- t est is co mple te or h a s be en abo rted , th e d r iv e upd ates the self-t e s t result s v a lue field in it s self- t e st re su lt s l o g p a g e in n on- vola tile m e mo ry . the host may use l og sen s e to re ad the resu lt s fro m up to th e las t 20 se lf-t es t s pe rf or me d b y th e d r iv e. t h e se lf- t e s t r e sult s value is a 4- bit field th at r epo rt s the r e sult s of th e te st. if th e f i eld is ze ro , t h e d r ive p a ss ed wit h no e r r o r s de te cted by the dst . if th e fie l d is not ze ro , the test faile d fo r the r easo n re por ted in the field . the dri v e will report the failu re condition and lba (if app lic able) in the self-tes t r e s u lt s log p a rameter . the sense key, asc, ascq, and fru are used to report the failure condition. 6.2.6.2.5 abort th er e are sever a l ways to a bor t a dia gno stic. y o u ca n us e a scsi bu s re se t or a bus device res e t message to ab or t the d i agn osti c. y o u can ab or t a dst executing in b a ckg r o u n d mo de b y us ing th e a bor t co de in the dst function co de fie l d. this will cause a 01 (self-test aborted by the application c lient) code to appear in the self -tes t res u lt s values log. all other abort mechanisms will be reported as a 02 (self-te st routine was interrupte d by a reset condition). 6.2.7 product warranty beginning on the date of shipment to customer and contin uing for a period of five years, seagate warrants that each product (including components and subassemblies) or spare part that fails to function properly under nor- mal use due to defect in materials on workmanship or du e to nonconformance to the applicable specifications will be repaired or replaced, at seagate? s option and at no char ge to customer, if retu rned by customer at cus- tomer?s expense to seagate?s designa ted facility in accordance with seagat e?s warranty proc edure. seagate will pay for transporting the repair or replacement item to customer. for more deta iled warranty information refer to the standard term s and conditions of purchase for seagate products.
cheetah 15k.5 scsi product manual, rev. j 21 shipping whe n tr anspo rting or ship ping a dri v e , a sea g a t e ap pro v ed co nt ain e r mu st b e u s e d . kee p you r o r ig inal box. th ey ar e ea sily ide n tifie d by the sea g a t e - a ppr oved p a ckag e lab e l. shipp i ng a dr ive in a no n- app ro ve d con- t a iner vo ids th e dr ive war r anty . seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran- sit. contact your authorized seagate distributor to pu rchase additional boxes. seagate recommends shipping by an air-ride carrier experienced in handling computer equipment. product repair and return information seagate customer service centers are the only facilities autho rized to service seagat e drives. seagate does not sanction any third-party repair fa cilities. any unauthorized repair or tampering with the factory-seal voids the warranty.
22 cheetah 15k.5 scsi product manual, rev. j 7.0 physical/electrical specifications this section provides information relating to the physic al and electrical characteristics of the cheetah 15k.5 scsi drive. 7.1 ac power requirements none. 7.2 dc power requirements the voltage and current requirements for a single drive are shown in the following table. values indicated apply at the drive power connector. the tables show current values in amperes. table 3: st3300655lc dc power requirements notes lvd mode voltage +5 v +12 v regulation [5] 5% 5% [2] average idle current dc x [1] [6] 0.70 0.80 maximum starting current (peak dc) dc (peak ac) ac 3 3 [3] [3] 0.76 1.07 1.94 3.35 delayed motor start (max) dc 3 [1] [4] 0.57 0.03 peak operating current dc maximum dc maximum (peak) dc x 3 3 [1] [1] 0.69 0.70 1.38 1.18 1.23 2.90
cheetah 15k.5 scsi product manual, rev. j 23 t a ble 4: st31 468 55 lc dc p o we r requ ire m ent s t a ble 5: st3 734 55 lc dc p o we r r e quire ment s [1] measured with average reading dc ammeter or equivalent sampling scope. instantaneous current peaks will exceed these values. power supply at nominal voltage. number of dr ives tested = 6, 35 degrees c ambient. [2 ] f or +12 v , a ? 1 0 % to le ra nc e is p e r m i ssib l e d u r in g in itia l s t ar t o f sp ind l e, an d m u st r e t u r n to 5 % be fo r e 1 5 ,000 rp m is r eache d. th e 5% mu st b e ma int a ined a f te r th e d r iv e s i gn ifie s th at it s po we r- up se qu e n c e has been completed and that the drive is abl e to accept selection by the host initiator. [3] see +12 v current profile in figure 1 . [4] this condition occurs when the motor start option is enabled and the drive has not yet received a start motor command. [5] see section 7.2.1 ?conducted noise immunity.? specified voltage tolerance is inclusive of ripple, noise, and transient response. [6] during idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track. general notes for tables 3, 4, and 5: 1. minimum current loading for each supply voltage is not less than 1.2% of the maximum operating current shown. 2. the +5 and +12 volt supplies shall employ separate ground returns. 3. where power is provided to multiple drives from a common supply, careful consideration for individual drive power requirements should be noted. where multiple units are powered on simultaneously, the peak notes lvd mode voltage +5 v +12 v regulation [5] 5% 5% [2] average idle current dc x [1] [6] 0.71 0.57 maximum starting current (peak dc) dc (peak ac) ac 3 3 [3] [3] 0.74 1.04 1.94 3.32 delayed motor start (max) dc 3 [1] [4] 0.56 0.03 peak operating current dc maximum dc maximum (peak) dc x 3 3 [1] [1] 0.67 0.68 1.42 0.88 0.94 2.50 notes lvd mode voltage +5 v +12 v regulation [5] 5% 5% [2] average idle current dc x [1] [6] 0.69 0.42 maximum starting current (peak dc) dc (peak ac) ac 3 3 [3] [3] 0.72 1.00 1.94 3.32 delayed motor start (max) dc 3 [1] [4] 0.56 0.03 peak operating current dc maximum dc maximum (peak) dc x 3 3 [1] [1] 0.67 0.68 1.40 0.78 0.82 2.38
24 cheetah 15k.5 scsi product manual, rev. j starting current must be available to each device. 4. parameters, other than spindle start, are measured after a 10-minute warm up. 5. no terminator power. 7.2.1 conducted noise immunity noise is specified as a periodic and random distributi on of frequencies covering a band from dc to 10 mhz. maximum allowed noise values given below are peak-t o-peak measurements and apply at the drive power connector. 7.2.2 power sequencing the drive does not require power sequencing. the drive protects against inadverten t writing during power-up and down. daisy-chain operation requires that power be supplied to the scsi bus terminator to ensure proper termination of the peripheral i/o cables. to automatically delay motor start based on the target id (scsi id) enable the delay motor start option and disable the enable motor start option on the j6 connector on lw mod- els or on the backplane for lc models. see section 9.1 for pin selection information. to delay the motor until the drive receives a start unit command, enable the en able remote motor start option on the j6 connector on lw models or on the backplane for lc models. 7.2.3 current profile fig u r e s 1 and 2 sh ow +5v an d +12v samp le cu rr en t pr ofiles for the st3 3 0 065 5lc mod e l. all times and cur r ent s ar e typica l. see t a b l e 3 for ma ximum cur r e n t r e q u ir eme n t s . +5 v = 2 5 0 mv pp fr om 0 to 10 0 khz to 2 0 mhz. +1 2 v = 8 0 0 mv pp fr om 10 0 hz to 8 khz. 4 5 0 mv pp fr om 8 khz to 20 khz. 2 5 0 mv pp fr om 20 khz to 5 m h z.
cheetah 15k.5 scsi product manual, rev. j 25 figure 1. typical st3300655lw dr ive +12v lvd current profile figure 2. typical st3300655lw dr ive +5 v lvd current profile
26 cheetah 15k.5 scsi product manual, rev. j 7.3 power dissipation st3 300 65 5l w/st33 006 55 lc fo r dr ives usin g low volt a ge dif f er entia l inte rface cir c uit s , ty pica l po we r diss ip a t io n un d e r idle conditions is 13.1 watt s ( 4 4 . 7 0 btus pe r ho ur ). t o obt a i n o p e r atin g p o wer fo r typica l ra ndo m r e a d o per atio n s , r ef er t o th e f ollo win g i/ o rat e cu rv e (s ee fig ur e 3) . l o c at e the t y pic a l i / o ra te fo r a d r iv e in y o u r s yst em on th e ho rizon t al axis and rea d the cor r e spon din g +5 volt cu rr en t, +1 2 vo lt cur r e n t, a nd tot a l watt s o n th e vert ical axis. t o calculate btus per hour , multiply w a tt s by 3.4123. ) figu re 3. st3 3006 55l c dc cur r en t an d p o wer vs . iops (l vd) st33006 5 5 l c curre nt / p o w e r vs t hro ug hp ut ( s cs i - l v d) r a nd om 8 b l oc k r e a ds 0. 0 00 0. 2 0 0 0. 4 00 0. 6 00 0. 8 00 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 1. 8 0 0 0. 0 5 0. 0 1 00 . 0 1 5 0. 0 20 0. 0 25 0. 0 3 00 . 0 3 50 . 0 40 0. 0 i/ o s p e r s e co n d ampe r e s 0. 0 0 2. 0 0 4. 0 0 6. 0 0 8. 0 0 10 . 0 0 12 . 0 0 14 . 0 0 16 . 0 0 18 . 0 0 power (watts) 5vo l t a 12 v o l t a wat t s
cheetah 15k.5 scsi product manual, rev. j 27 st3 146 85 5l w/st31 468 55 lc fo r drive s u s ing low volt ag e d i f f er en tia l inte rface cir c u i t s , typical p o wer dissip a tion und er idle cond itio ns is 10 .3 9 watt s ( 3 5.45 bt us pe r ho u r). t o obt a i n o p e r atin g p o wer fo r typica l ra ndo m r e a d o per atio ns, refer to t h e follow i ng i/o rate cu rve (see fig u r e 4) . l o c at e the t y pic a l i/o ra te fo r a d r iv e in y o u r s yst em on th e ho rizon t al axis and rea d the cor r e spon din g +5 volt cu rr en t, +1 2 vo lt cur r e n t, a nd tot a l watt s o n th e vert ical axis. t o calculate btus per hour , multiply w a tt s by 3.4123. figure 4. st3146855lc dc current and power vs. iops (lvd) s t 3 1 4 6 8 5 5 l c curre nt / p o w e r vs t hro ug hp ut ( s cs i - l v d) r a nd om 8 b l oc k r e a ds 0.0 00 0. 2 00 0. 4 00 0. 6 00 0. 8 00 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 1. 8 0 0 0. 0 5 0. 0 1 00 . 0 1 5 0. 0 20 0. 0 25 0. 0 3 00 . 0 3 50 . 0 40 0. 0 i/ o s p e r s e co n d ampe r e s 0. 0 0 2. 0 0 4. 0 0 6. 0 0 8. 0 0 10 . 0 0 12 . 0 0 14 . 0 0 16 . 0 0 18 . 0 0 power (watts) 5vo l t a 12 v o l t a wat t s
28 cheetah 15k.5 scsi product manual, rev. j st3 734 55 l w /st 373 455 lc fo r dr ives usin g low volt a ge dif f er entia l inte rface cir c uit s , ty pica l po we r diss ip a t io n u nder idle conditions is 8.49 watt s ( 2 8 . 9 7 btus pe r ho ur ). t o obt a i n o p e r atin g p o wer fo r typica l ra ndo m r e a d o per atio n s , r ef er t o th e f ollo win g i/ o rat e cu rv e (s ee fig ur e 5) . l o c at e the t y pic a l i / o ra te fo r a d r iv e in y o u r s yst em on th e ho rizon t al axis and rea d the cor r e spon din g +5 volt cu rr en t, +1 2 vo lt cur r e n t, a nd tot a l watt s o n th e vert ical axis. t o calculate btus per hour , multiply w a tt s by 3.4123. figure 5. st373455lc dc current and power vs. iops (lvd) st3734 5 5 l c curre nt / p o w e r vs t hro ug hp ut ( s cs i - l v d) r a nd om 8 b l oc k r e a ds 0. 0 00 0. 2 00 0. 4 00 0. 6 00 0. 8 00 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 1. 8 0 0 0. 0 5 0. 0 1 00 . 0 1 5 0. 0 20 0. 0 25 0. 0 3 00 . 0 3 50 . 0 40 0. 0 i/ o s p e r s e co n d amper e s 0. 0 0 2. 0 0 4. 0 0 6. 0 0 8. 0 0 10 . 0 0 12 . 0 0 14 . 0 0 16 . 0 0 18 . 0 0 power (watts) 5vo lt a 12 vo lt a wat t s
cheetah 15k.5 scsi product manual, rev. j 29 7.4 environmental limits t e m per atur e an d hum idity value s e x p e r i enced b y the d r iv e must be such th at co nde ns ation d oes not occur on a n y d r ive p a rt. altitude a nd atmo sp her ic p r e s sur e specif ica t ions are r e fer e n c e d to a st an dar d da y at 5 8 .7 f (14.8c). maximum wet bulb temperature is 82f (28c). 7.4.1 temperature a. operating the maximum allowable continuous or sustained hda case temperature for the rated annualized failure rate (afr) is 122f (50c). the maximum allowable hda case temperature is 60c. occasional excur - sions of hda case temperatures above 122f (50c) or below 41f (5c) may occur without impact to specified afr. continual or sustained operation at hda case temperatures outside these limits may degrade afr. provided the hda case temperatures limits are met, the drive meets all specifications over a 41f to 131f (5c to 55c) drive ambient temperature range with a maximum temperature gradient of 36f (20c) per hour. air flow may be needed in the drive enclosure to ke ep within this range (see section 8.3). operation at hda case temperatures outsid e this range may adversely affect the dr ives ability to meet specifications. to confirm that the required cooling for the electronics and hda case is provided, place the drive in its final mechanical configuration, perform random write/read operations and measure the hda case temperature after it has stabilized. b. non-operating ?40 to 158f (?40 to 70c) package ambient with a maximum gradient of 36f (20c) per hour. this specification assumes that the drive is packaged in the shipping container designed by seagate for use with drive. figure 6. locations of the hda temperature check point 7.4.2 relative humidity the values below assume that no condensation on the drive occurs. a. operating 5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour. b. non-operating 5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour. 7.4.3 effective altitude (sea level) a. operating ?1,000 to +10,000 feet (?305 to +3,048 meters) hda temp. check point .5" 1 .0"
30 cheetah 15k.5 scsi product manual, rev. j b. non-operating ?1,000 to +40,000 feet (?305 to +12,210 meters) 7.4.4 shock and vibration shock and vibration limit s specified in th is d o c u m e nt ar e m e asu r ed dir e c t ly on the dr ive chassis. if th e d r ive is ins t alle d in an e n c l osu r e t o whic h the s t at ed sh o ck a n d /o r vib r a t io n crit er ia is a p p lied , re so na nc es m a y oc cu r in te rn ally to th e e n closur e r e sulting i n dr ive move men t in ex c e s s of th e s t at ed lim it s . if th is sit u a tio n is ap p a re nt , it may be ne cessa r y to m odify th e enclo su re to min i mize dr ive m o veme nt. th e limit s of shock an d vibra t ion d e fined with in this doc um ent ar e spe c ified with th e dr ive mou n ted b y a n y of th e fo ur m e th od s sh ow n in f i gu r e 7, a n d in ac co rd an ce w i th th e r e s t ric t io ns o f sec t ion 9. 4. o r ie nt a t io n o f the side n e a r est th e led m a y b e up o r do wn . 7.4.4.1 shock a. operating?normal th e d r ive, a s inst alled for no rma l op er ation, sha ll op er a t e er ro r f r e e wh ile s u b j ec te d to int e r m i tte nt sh ock no t e x cee d in g 1 5 gs a t a m a ximum dur ation of 1 1 msec (h alf sine wa ve ). th e d r ive, a s inst alle d for no rma l o per ation , sha ll o per ate e r r o r fre e while sub j ecte d to inter m itte nt sho c k no t e x cee d ing 60 gs at a maximu m duration of 2 msec (half sinewave). shock may be applied in the x, y, or z axis. b. operating?abnormal equipment, as installed for normal operation, does not incur physical damage wh ile subjected to intermit - tent shock not exceeding 40 gs at a maximum duration of 11 msec (half sinewave). shock occurring at abnormal levels may promote degraded operational perf ormance during the abnormal shock period. speci - fied operational performa nce w ill c o ntinue when normal operati ng s h ock levels resu me. shoc k may be applied in the x, y, or z axis. shock is not to be repeated more than two times per second. c. non-operating the limits of non-operating shock shall apply to all cond itions of handling and tran sportation. this includes both isolated drives and integrated drives. the drive subjected to nonrepetitive shock not exceedin g 75 gs at a maximum duration of 11 msec (half sinewave) shall not exhibit device damage or performa nce degradation. shock may be applied in the x, y, or z axis. the drive subjected to nonrepetitive shock not exceed ing 250 gs at a maximum duration of 2 msec (half sinewave) does not exhibit device damage or performanc e degradation. shock may be applied in the x, y, or z axis. the drive subjected to nonrepetitive shock not exceedin g 120 gs at a maximum duration of 0.5 msec (half sinewave) does not exhibit device damage or performanc e degradation. shock may be applied in the x, y, or z axis. d. packaged disc drives shipped as loose load (not p a lletized) general freight w ill be p a ck aged to withs t a nd drop s from h e igh t s as define d in th e t able b e low . f o r ad dition al det a ils r e fer to seag ate sp ecifica t io ns 3 019 0- 00 1 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 kg). package size packaged/product weight drop height <600 cu in (<9,800 cu cm) any 60 in (1524 mm) 600-1800 cu in (9,800-19,700 cu cm) 0-20 lb (0 to 9.1 kg) 48 in (1219 mm) >1800 cu in (>19,700 cu cm) 0-20 lb (0 to 9.1 kg) 42 in (1067 mm) >600 cu in (>9,800 cu cm) 20-40 lb (9.1 to 18.1 kg) 36 in (914 mm)
cheetah 15k.5 scsi product manual, rev. j 31 drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by seagate for general freight shipment shall withstand a drop test fr om 48 inches (1,070 mm) against a concrete floor or equivalent. figure 7. recommended mounting z y x z y x
32 cheetah 15k.5 scsi product manual, rev. j 7.4.4.2 vibration a. operating?normal the drive as installed for normal operation, shall comply with the complete sp ecified performance while subjected to continuous vibration not exceeding 10?500 hz @ 0.5 g (zero to peak) vibration may be applied in the x, y, or z axis. operating normal translational random flat profile: 10?500 hz 0.4 grms b. operating?abnormal equipment as installed for normal operation shall not incur physical damage while subjected to periodic vibration not exceeding: 15 minutes of duration at major resonant frequency 10?500 hz @ 0.75 g (x, y, or z axis, zero to peak) vibration occurring at these levels may degrade ope rational performance during the abnormal vibration period. specified operational perf ormance will continue when normal operating vibration levels are resumed. operating abnormal translational random flat profile 10 - 500 hz 1.2 grms c. non-operating the limits of non-operating vibration shall apply to all conditions of handling and transportation. this includes both isolated driv es and integrated drives. the drive shall not incur physical damage or degraded performance as a result of continuous vibration not exceeding 5?22 hz @ 0.040 inches (1.02 mm) displacement (zero to peak) 22?500 hz @ 2.00 g (zero to peak) vibration may be applied in the x, y, or z axis. non-operating translational random flat profile: 10?500 hz 1.2 grms 7.4.5 air cleanliness the drive is designed to operate in a typical of fice environment with minimal environmental control. 7.4.6 corrosive environment sea g a t e e l ectr on ic dr ive com pon en t s p a ss acceler a ted cor r o s io n te stin g e qui va lent to 10 yea r s exposur e to lig ht ind u str i al e n viro nme n t s cont a i nin g sulfur ou s g a ses, ch lor i ne and nitr ic o x id e, classes g a nd h p e r ast m b84 5 . ho we ver , this a c ce ler a ted testing can not dup licate ever y po tentia l ap plication envir onm ent. users should use caution exposing any electronic comp onents to uncontrolled chemical pollutants and corro- sive chemicals as electronic drive component re liability can be affected by the installation environment. the sil- ver, copper, nickel and gold films used in seagate produc ts are especially sensitive to the presence of sulfide, chloride, and nitrate contaminants. sulfur is found to be the most damaging. in addition, electronic components should never be exposed to condensing water on the surf ace of the printed circuit board assembly (pcba) or exposed to an ambient relative humidity greater than 95 %. materials used in cabinet fabrication, such as vulca- nized rubber, that can outgas corrosive compounds should be minimized or eliminat ed. the useful life of any electronic equipment may be extended by replacing ma terials near circuitry with sulfide-free alternatives.
cheetah 15k.5 scsi product manual, rev. j 33 7.4.7 acoustics sou n d p o wer d u r i ng idle m ode sh all be 3.7 be ls typica l wh en me asur ed to iso 777 9 sp ecifica t io n. so und p o wer while ope ra tin g sh all be 4 . 3 bels typica l wh en m e asu r ed to i s o 7 779 sp ecifica t io n. there will not be any discrete tones more than 10 db above the masking noise on ty pical drives when mea- sured according to seagate specificat ion 30553-001. there will not be an y tones more than 24 db above the masking noise on any drive. 7.4.8 electromagnetic susceptibility see section 3.1.2. 7.5 mechanical specifications the following nominal dimensions are exclusive of the de corative front panel accesso ry. however, dimensions of the front panel are shown in figure below. refer to figures 8 and 9 for detailed mounting configuration dimensions. see section 9.4, ?drive mounting.? figure 8. lw mounting configuration dimensions he ight (m ax): 1.02 8 in. 2 6.1 1 mm wid t h (m ax): 4.01 0 in. 1 01 .8 5 mm de pth (m ax): 5.78 7 in. 1 46 .9 9 mm weight (max): 1.85 pou nds 0.839 kilograms j h l b s k [1] f [1] d e p mounting holes are 6-32 unc 2b, three on each side and four on the bottom. max screw penetration into side of drive is 0.15 in. (3.81 mm). max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in. (3.05 mm). notes: [1] -x- u -z- t // -z- a m c r ref -z- v -x- inches a b c d e f h j k l m p r s t u v 26.10 147.00 101.60 95.25 3.18 44.45 28.50 101.60 6.35 41.60 4.60 41.28 46.13 8.00 0.38 0.38 6.73 1.028 5.787 4.000 3.750 .125 1.750 1.122 4.000 .250 1.638 .181 1.625 1.816 .315 .015 .015 .265 max max ?.010 ?.010 ?.010 ?.010 ?.020 ?.010 ?.010 ?.010 ?.020 ?.020 max max ?.010 max max ?.25 ?.25 ?.25 ?.25 ?.50 ?.25 ?.25 ?.25 ?.50 ?.50 max max ?.25 dimension t able millimeters ref
34 cheetah 15k.5 scsi product manual, rev. j figure 9. lc mounting configuration dimensions j h l b a s k [1] m c r ref f [1] d e p mounting holes are 6-32 unc 2b, three on each side and four on the bottom. max screw penetration into side of drive is 0.15 in. (3.81 mm). max screw tightening torque is 6.0 in-lb (3.32 nm) with minimum full thread engagement of 0.12 in. (3.05 mm). notes: [1] inches a b c d e f h j k l m n p r s t u 26.10 147.00 101.60 95.25 3.18 44.45 28.50 101.60 6.35 41.60 4.60 1.02 41.28 66.50 7.00 0.38 0.38 1.028 5.787 4.000 3.750 .125 1.750 1.122 4.000 .250 1.638 .181 .040 1.625 2.618 .276 .015 .015 max max ?.010 ?.010 ?.010 ?.010 ?.020 ?.010 ?.010 ?.010 ?.020 max max max max ?.25 ?.25 ?.25 ?.25 ?.50 ?.25 ?.25 ?.25 ?.50 max max dimension t able millimeters -x- u -z- -x- n -z- t // -z- -z- -x- ref
cheetah 15k.5 scsi product manual, rev. j 35 8.0 defect and er ror management sea g a t e co ntinu e s to use in nova t ive tech nolo g ies to m ana ge d e fect s an d er ro rs. the s e te chno logie s are d e signe d to incre a se da t a integ r ity , p e rfo rm dr ive se lf-ma inten ance, an d va lidat e pr op e r dr ive op e r a t io n. scsi defect and error management involves drive inte rnal defect/error management and scsi system error considerations (errors in communications between the in itiator and the drive). in addition, seagate provides the following technologies us ed to increase data inte grity and drive reliability: ? background media scan (see section 8.4 ) ? media pre-scan (see section 8.5 ) ? deferred auto-reallocation (see section 8.6 ) ? idle read after write (see section 8.7 ) the read error rates and specified storage capacities ar e not dependent on host (initiator) defect management routines. 8.1 drive internal defects during the initial drive forma t operation at the factory, media defects are identified, tagged as being unusable, and their locations recorded on the drive primary defect s list (referred to as the ?p? list and also as the etf defect list). at factory format time, these known defects are also reallocated, that is, reassigned to a new place on the medium and the location listed in the defects reallocation table. the ?p? list is not altered after factory formatting. locations of defects found and reallocated during error recovery procedures after drive shipment are listed in the ?g? list (defects growth list). the ?p? an d ?g? lists may be referenced by the initiator using the read defect data command (see the scsi commands reference manual ). 8.2 drive error recovery procedures whe neve r an er ro r occu rs d u r i ng dr ive o p e r atio n, the dr ive, if p r o g ra mme d to do so, p e r f o r m s er ro r reco ve ry p r oce dur es to attemp t to r e cover the d a t a . th e er ro r r e cover y pr ocedu re s u s e d de pe nd o n the o p tion s p r e v i- o u sly se t u p in the er ro r r e cover y p a ra meter s mod e p age . er ro r r e cover y and de fe ct ma nag eme n t ma y in vo lve th e us e o f se ver a l scsi co m m a n d s , th e d e t a ils o f whic h ar e de scr ibe d in th e scsi inter f ace pro duct m anu al. t h e drive imple m en t s se le ct ab le erro r re c o v e r y time limit s su ch as are re q u i re d in vid e o a p p lica t io ns . f o r ad d i - tion al in fo rm ation on this, re fe r to the err o r recover y page t a ble in th e scsi co mma nds re fe re nce m anu al , which de scr i be s the mo de sele ct/mo de sen s e er ro r recover y p a r a me ters. the error reco ve ry schem e sup por ted b y th e dr ive p r o v id es a m ean s to co ntro l the tot a l er ro r r e cove ry time for the entire command in addition to controlling the recovery level for a single lba. the tot a l amount of time spent in e r r o r re co ve ry for a co mma nd can be lim ite d via the re co ve ry t i me limit bytes in the er ro r recover y mod e pag e . th e tot a l am oun t of ti me spe n t in er ror r e cover y fo r a single lba can be limited via the read retry cou n t o r w r ite retry coun t bytes in th e err o r re co ve ry mod e page . th e dr ive fir m war e er ro r re co very alg o ri thms cons ist of 1 1 levels for read rec o v e ries and 5 levels for writes.
36 cheetah 15k.5 scsi product manual, rev. j t a b l e 6 e qua tes the read a nd w r ite re tr y cou n t with the ma ximum po ssible r e cover y time for re ad an d wr ite re co ve ry of in divid u a l l bas . t h e t i me s giv e n d o no t in clu d e tim e t a ken to p e rfo rm r eallo ca tions, if re allo ca tio n s a r e p e r f o rme d. reallo ca tions ar e pe rfor me d when th e arre bit (for re ad s) or a w re bit (for wr ites) is one , th e rc bit is ze ro , and th e recove ry t i m e lim i t fo r the co mma nd h as no t ye t b ee n me t. t i me n eed ed to pe rfor m rea llocation is not co un te d aga inst the re co ve ry t i me l i mit. th e rea d co ntinu ous ( r c) b i t, whe n se t to o ne, r equ es t s th e d i sc dr ive to tr an sfe r th e r e qu es te d d a t a le n g th with o u t ad din g de lay s ( f or re tr ies or ecc cor r e c t i on ) t h a t may be re qui red to insur e d a t a in te gr ity . th e disc d r ive ma y sen d er ro neo us dat a in or der to main t a in the co ntinuo us flo w o f d a t a . the rc bit shou ld on ly b e us ed w h e n d a t a in te gr ity is no t a co nc er n an d s p e e d is of u t m o st imp o r t ance. if th e re co ve ry t i me li mit or re tr y co un t is r e a c h e d du r i ng er ro r r e c o ve r y , th e st a t e of th e rc bit is exam ined . if the rc b i t is se t, the dr ive will transfer the unrec o v e red dat a with no error indication and c o ntinue to execute the rema ining c o mmand. if the rc bit is not set, the dri v e will s t op dat a transfer with the last good l ba, and report a ?c heck condition, un re co ve re d re ad er ro r .? [1 ] t he se va lu es ar e su bje c t to ch a n g e . setting the s e r e try cou n t s to a va lue be low the de fa ult setting cou l d r e sult in a n in crea sed un reco ve re d error rate whi c h may exceed the value giv e n in this produc t manual. a setting of zero (0 ) will resul t in the d r ive no t pe rfor min g er ror re co ve ry . fo r e x amp l e, supp ose the read /w r i te recover y p a ge has the rc bit se t to 0, r ead re try coun t se t to 4, a nd th e r e cover y ti me lim it fie l d ( m od e se nse p a g e 0 1 , b y tes 1 0 a nd 1 1 ) se t to ff f f h e x (m aximum ). a fou r l b a re ad com m an d is allo we d to t a ke up to 253 .1 1 msec re co ve ry time fo r ea ch of the fo ur lbas i n the comm and . if the re cover y tim e limit is set to 0 0 c8 he x ( 200 mse c de cim a l) a four l ba r ead com m an d is allo we d to t a ke u p to 20 0 msec for all er ro r r e cover y within th at co mman d . the use of the reco ve ry t i me l i mit field allows fine r g r a nula r ity on co ntro l of the time sp ent in er ro r r e covery . the re covery t i me lim it on ly s t ar t s co u n tin g wh en th e d r ive is ex ec ut in g er ro r r e cov e r y a n d it r e s t ar t s o n e a c h c o m m a nd . th er efor e, ea ch co mma nd? s tot a l re co ve ry time is sub j ec t t o th e r e c o v e r y t i me limit . not e : a r e c o v e r y tim e limit of 0 will us e the drive? s default v a lue of ff ff . mi nimum rec o v e ry time limit is achieved by setting the recovery t i me limit field to 00 01. table 6: rea d and wr it e re try c ount maximum rec o ve ry times [ 1 ] re ad re tr y co un t [1 ] max i mu m rec o ve ry tim e p e r lba (c um ul a tiv e, m s ec ) wr i t e r e t r y co un t ma xi mu m r e co ver y tim e p e r lb a (cu m ul ati v e, m s e c ) 0 5 1. 87 0 23 . 9 4 1 5 9. 85 1 35 . 9 1 2 2 03 .4 9 2 55 .8 6 3 2 19 .4 5 3 67 .8 3 4 2 5 3 .1 1 4 1 19.79 5 2 79.35 5 (d ef aul t ) 1 4 7 . 7 2 63 1 1 . 2 7 73 9 5 . 1 2 84 6 3 . 1 2 94 9 5 . 0 4 10 53 0.95 1 1 (d ef aul t ) 1 ,282.97
cheetah 15k.5 scsi product manual, rev. j 37 8.3 scsi systems errors infor m atio n on the r e p o r t in g of ope ra tio nal e r r o r s or fa ult s acro ss th e inter f ace is g i ve n in the scsi interface pr odu ct ma nu al . messag e pro t o c ol system is d e scrib ed in th e scsi in te rface pr od uct m anu al . several of the me ssa ges a r e used in the scsi syste ms er ror ma na gem ent system . t he re qu est se nse com m an d r e tur n s in fo rma tion to the h o st abo ut num er ous kinds of er ro rs or fa ult s . t he recei v e dia gno stic result s re por t s the r e sult s of d i ag nostic o per atio n s pe rfor me d by the drive . status returned by the drive to the initiator is described in the scsi commands reference manual . status reporting plays a role in the scsi systems error manage ment and its use in that respect is described in sec- tions where the various commands are discussed. 8.4 background media scan backgr o u nd m edia sca n ( b ms) is a se lf- i nitiate d me di a sca n. bm s is de fin e d in th e t 1 0 d o c u m e nt spc-4 a v a ilable fro m the t1 0 co mmitte e . bms per fo rm s se qu entia l re ads a c r o ss the en tir e p a ck o f the med i a while th e dr ive is id le. in r a id ar ra ys , bm s allo ws h o t sp ar e dr ive s t o be s c a n n e d fo r d e fe c t s pr ior t o be in g pu t into servic e by t h e hos t syst em. on regula r duty drives, if the host sys tem mak e s use of t h e bms log page, it can av oid plac ing dat a in s u s p ect loc a ti ons on the media. unreadable and re c o vered error sites will be logged or r eal located p e r arre/a wre settings. with bms, the host sys tem can cons ume le ss po we r an d system over he ad by on ly che c king bm s st atus and r e sult s ra th er th an tying u p the b u s an d co nsum ing p o wer in the p r oce s s of ho st-i ni tiated m edia scan nin g activ- ity . since th e ba ckg r ou nd scan fu nctions ar e o n ly do ne d u r i ng id le pe rio d s, bm s ca uses a ne glig ible im p a ct to sys- te m pe rf or m a n ce . t h e firs t bm s sca n for a ne wly man u factur ed dr ive is p e rfo rme d as quickly a s po ssib le to ver i fy the med i a an d pr otect dat a by se ttin g the ? s t a r t ti me a f ter id le? to 5ms, all subseq ue nt scan s b e g i n af ter 500ms of idle time. other f eatures that normally us e id le time to function will f unction normally becaus e bms fun c tion s fo r bu rst s of 80 0ms an d then su sp en ds activi ty fo r 10 0ms to a llow other ba ckg r ou nd fu nctio n s to o per ate. bms interrupt s immediately to s e rvice host commands from the interf ace bus w h ile performing reads . bms will complete any bms - initiated error rec o ve r y p r io r t o re tu rn ing to s e r vice ho st- i nitiated co mman d s. ove r h ead a s sociate d with a r e tur n to ho st- s e r vicing a ctivity fr om bms on ly imp a ct s the fir st com m an d that in te rr upted bms, th is r e sult s in a typica l d e lay of abo ut 1 ms. 8.5 media pre-scan me dia pre- scan is a fe atur e tha t a llows th e d r ive to r e p a ir me dia err o r s th at would othe rwise h a ve be en fo und by t h e h o s t sys te m du r i ng c r itic al da t a a cce ss es e a r l y in th e dr ive ? s lif e . t h e de fa u l t s e t t in g fo r me d i a pre - s c a n is en ab led o n st an da rd pr odu ct s. me dia pr e- sca n che c ks ea ch write co mman d to det er min e if the d e stinatio n l b as h a ve be en sca nne d b y bms. if the lbas ha ve b een ver i fied, th e d r ive pr oc ee ds with the n o rm al wr ite command. if the lbas have not been ve rified by bms, pre-scan will convert th e write to a write verify to certify th at th e da t a was proper ly written to the disc. note . dur i ng pre - scan write verify commands, write pe rformance may decrease by 50% until pre-scan completes. write performance testing should be performed after pre-scan is complete. this may be checked by reading the bms status. t o expedite the s c an of the full p a ck and subsequently exit from the pr e-scan period, bms will begin scanning immediately when the drive goes to idle during the pre-sc an period. in the event that the drive is in a high transaction traffic environment and is unable to complete a bms scan within 24 power on hours bms will dis- able pre-scan to restore full performance to the system.
38 cheetah 15k.5 scsi product manual, rev. j 8.6 deferred auto-reallocation de fe rr ed au to -r ea lloc a t i on ( d ar) simplifies re allo ca tio n alg o rith ms a t the system le ve l b y allo wing the d r ive to r e a llocate un re ada ble lo cations on a subse que nt wr it e comma nd . sites ar e ma rked for dar d u rin g r ead ope r- at ion s p e r f o r m e d by t h e drive . wh en a wr ite c o m m a n d is r e ceiv ed fo r an lb a m a rk ed for dar, t h e au to -r ea llo - ca tio n pr oc es s is in vo ke d an d a tte m p t s t o re wr ite th e d a t a to the original location. if a ve rifica tion of this re wr ite fails, the s e c t or is re-mapp ed to a sp are location . this is in contrast to the sy stem havin g to u s e the reassign co mma nd to r eassign a lo ca tion th at was un re ad- a b le a nd the n ge ner ate a wr ite co mman d to re wr ite t he dat a . da r is most ef fective when a w re and ar re a r e ena bled ?this is th e d e faul t setting fr om the seag at e factor y . with a w re and arre d i sa bled dar is unable to reallocate the failing location and will report an error sens e code indic a ting that a write command is being attempted to a prev iously failing location. 8.7 i dle read af ter w r ite idle read a f ter w r ite (ir a w) utilizes idle time to verify the integrity of rec e ntly written dat a . during idle periods, n o active system r e q uest s , the d r ive r ead s r e cen t ly wr itte n da t a fr om the m edia and com p a r e s it to valid wr ite com m an d d a t a re sid ent in the dr ive s dat a b u f f e r . an y se ctor s that fail th e co mp a r iso n r e sult in t h e invocation of a r e write a nd au to -r ea llocation p r o c e s s. t he p r oce s s atte mpt s to rewr ite th e dat a to the o r ig inal lo ca tio n . if a verific a tion of this rewrite fails, the sector is re-mapped to a spare location.
cheetah 15k.5 scsi product manual, rev. j 39 9.0 installation note . th ese d r ives a r e desig ned to be used on ly on sin g le- e n d e d ( s e) or low volt age dif f ere n tial (l vd) busses. do not install these drives on a high voltage differential (hvd) bus. the first thing to do when ins t alling a drive is to set the drive sc si id and set up c e rt ain operating options . this is usually done by inst alling small shor ting jumpers on the j5 co nnec t or (see figu re 10), or via the driv e to host i/o signals on the lc model. some users connect cables to j5 and perform the set-up using remote switches. configure drive options fo r o p tion jump er location s a n d defin itio ns re fe r to fi gu res 1 0 an d 1 1 . drive defau lt mod e p a r a me te rs ar e n o t normally needed for installation. refer to section 10.3.2 for default mode parameters if they are needed. ? e nsu r e tha t the scsi id o f the dr ive is n o t the sa me as th e ho st ada pter . m o st ho st ad apter s u s e scsi id 7 because id 7 is the highest priority on both 8 and 16 bit data buses. ? if multiple devices are on the bus set the drive scsi id to one that is not presently used by other devices on the bus. ? if the drive is the only device on the bus, attach it to the end of the scsi bus ca ble. the user, system integra - tor, or host equipment manufacturer must provide external terminators. note. for additional information about terminator requirements, refer to sections 10.8 and 10.9 . ? s et all app ro pr iate optio n j u mp ers fo r de sir e d o per ation p r io r to p o wer o n . if ju mpe r s a r e cha n g ed af ter power has been applied, recycle the drive power to make the new settings effective. ? i nst a lla ti on in str u ctio ns ar e p r ovid ed b y h o st syste m do c u m e nt a t io n o r w i th an y a d dition ally pur chased dr ive installation software. if necessary see section 10 for seagate support services telephone numbers. ? do not remove the manufacturer?s installed labels from the drive and do not cover with additional labels, as the manufacturer labels contain information required when servicing the product. formatting ? drives are shipped from the factory low level formatted with 512 byte sectors. 9.1 drive id/option select header figure 10 shows the drive id select jumper connector. figure 11 shows the option select jumper connector for all models. figure 11 shows the drive?s j6 jumper connector. the notes following the figures describe the func- tions of the various jumper positions on the connectors . suggested part number for the jumpers used on j6 is molex 52747-0211 (seagate part number 77679052). a bag with the two jumper plug types is shipped with the standard oem drives.
40 cheetah 15k.5 scsi product manual, rev. j figure 10. j5 jumper header (on lw models only) scsi id = 8 scsi id = 9 scsi id = 10 scsi id = 11 scsi id = 12 scsi id = 13 scsi id = 14 scsi id = 15 a 3 a 2 a 1 scsi id = 0 (default) scsi id = 1 scsi id = 2 scsi id = 3 scsi id = 4 scsi id = 5 scsi id = 6 scsi id = 7 a 0 j1-dc power 68 pin scsi i/o connector j1 j5 pin 1 [1] [2] drive hda (rear view, pcb facing downward) [2] pin 1 pcb 1p 2p 3p 4p +5v ground [4] host alternate usage plug pins 1, 3, 5, and 7 are optional connections to switching circuits in host equipment to establish drive id. remote switches for id selection use jumpers as shown or connect a cable for remote switching as shown below. dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage plug. [4] reserved pins 2, 4, 6, and 8 are normally not grounded. they are driven low (ground) for 250 ms after a reset or pwr on to allow drive to read scsi id selected. a 0 a 1 a 2 a 3 1 1 97531 12 10 8 6 4 2 +5v drive activity led +5v n.c. n.c. ground
cheetah 15k.5 scsi product manual, rev. j 41 figure 11. j6 option select header (on lw models only) 9.1.1 notes for figures 10 and 11 . [1] notes explaining the functions of the various jump ers on j5 and j6 jumper header connectors are given here and in section 9.1.2 . the term ? default ? means as standard oem units are configured with a jumper on those positions when shipped from factory. ?off? me ans no jumper is installed; ?on? means a jumper is installed. off or on underlined is factory default condition. the pcba on lc models does not have connector j5 or j6. the j5 connector signals conform to sff- 8009 revision 2.0, unitiz ed connector for cabled drives, signal assignments for aux iliary connectors. [2] these signals are also on 80-pin j1 i/o connector. see tables 19 and 20 , note 9 . [3] voltage supplied by the drive. [4] dashed area is optional host circuitry (external to the drive) connected to host supplied optional usage plug. [5] do not connect anything to j5 pins 9, 11-12 or j6 pins 13-20. [6] connect an external drive activity led to j5 pin 8 (see figure 10 ) and the drive?s +5v power source, through an appropriately sized current limiting resistor. jumper plug (enlarged to show detail) j6 drive front pin 1 reserved [1] [5] parity disable term. power to scs i bus s e d s m e w p p d t p force single-ended bus mode write protect enable remote motor start delay motor start
42 cheetah 15k.5 scsi product manual, rev. j 9.1.2 function description note. j6 does not exist on the lc model and is supported on the lw model only. j6 jumper installation jumper function description se on forces drive to use single-ended i/o drivers/receivers only. off drive can operate on the interface in low volt age differential mode or single-ended, depend - ing on the voltage state of the i/o ?diffsns? line. default is se jumper not installed. ds me off off spindle starts immediately after power up - default setting. off on drive spindle does not start until start unit command received from host. on off s p ind l e s t ar tu p is d e layed by scsi id time s 12 se co nds af ter power is ap plie d, i.e., drive 0 sp ind l e st a r t s imme diately when dc power co nn ec te d, d r ive 1 st ar t s a f te r 12 se co nd de lay , drive 2 starts after 24 second delay, etc. on on drive spindle starts when start unit command received from host. delayed start feature is overridden and does not apply when me jumper is installed. wp on entire drive is write protected. off drive is not write protected. default is wp jumper not installed. pd on parity checking and parity error reporting by the drive is disabled. off drive checks for parity and reports result of parity checking to host. default is pd jumper not installed. res off reserved jumper position. default is no res jumper installed. tp off the drive does not supply terminator power to external terminators or to the scsi bus i/o cable. on drive supplies power to scsi bu s i/o cable. when drives have differential i/o circuits, a jumper on the tp position may be needed to power external terminators (see system docu - mentation). these drives do not have terminator circuits on the drive.
cheetah 15k.5 scsi product manual, rev. j 43 9.2 drive orientation the balanced rotary arm actuator design of the drive allows it to be mounted in any or ientation. all drive perfor- mance characterization, however, has been done with the driv e in horizontal (discs level) and vertical (drive on its side) orientations, and these are t he two preferred mounting orientations. 9.3 cooling th e host e n closur e m u st pr ovide he at r e mo val fr om th e d r ive. y ou shou ld co nfirm t h a t the ho st e n c l os ur e is d e signe d to ensur e th at the d r ive ope r a t e s w i th in th e t e m p er at ur e m e as ur em e n t g u i de line s d e s c r i b e d in sec - tion 7.4.1. in som e cases, force d air f low ma y b e r e q u ir ed to ke ep te mpe r a t u r e s a t or belo w th e tem per atur es spec ified in section 7.4.1. if for c ed air i s ne ce ssa r y , p o ssible air - flo w p a tte r n s ar e shown in fig u r e 12 . the a i r- flow p a tter n s are cr eate d by fans either forc ing or draw ing air as s h own in th e illus t rations. conduction, conv ec tion, or other forced air- flow patterns are acceptable as long as the temper ature measurement guidelines of section 7.4.1 are met. figure 12. air flow (suggested) above unit under unit note. air flows in the direction shown (back to front) or in reverse direction (front to back) above unit under unit note. air flows in the direction shown or in reverse direction (side to side)
44 cheetah 15k.5 scsi product manual, rev. j 9.4 drive mounting whe n mo unting th e dr ive using th e bo ttom hole s ( x - y plan e in fig u r e 7) ca re must be t a ke n to en su re th at th e d r ive is no t p h ysica lly d i stor ted du e to a stif f no n- fla t mo untin g surface . th e allo wa ble m oun ting sur f a ce stif fne s s is 80 l b /in (1 4.0 n/mm) . th e follo win g e qua ti o n an d p a r a g r ap h d e fine the allowa ble m oun tin g sur f a ce stif fnes s: wh er e ?k ? r e pr es en t s th e m o un tin g s u r f a ce stif f n e ss ( u nit s of lb/in o r n/mm) , and ?x? re pr esent s the ou t- of-p lan e mounting s u rface dis t orti on (unit s of inches or milli me ters ). the out-of-plane distor tion (?x?) is determined by d e fining a pla ne with thre e of the fo ur mo untin g p o int s fixed an d e valua tin g th e o u t-o f - p la ne defle ction of th e fou r th mo unting p o in t whe n a kn own for c e (f) is applied to the fourth point. note . befo re mou n ting the drive in a n y kind of 3 . 5 - in ch to 5 . 2 5 - i nch a d a p ter fram e, ver i fy with se aga te t e chn o lo gy that the d r ive ca n me et the shock a nd vi bration specifications wh ile m o un te d in s u c h an a dap te r fra m e. adap ter fr ame s that ar e ava ilabl e may not ha ve a mech anical stru ctur e cap a b l e of mo un tin g th e dr ive so tha t it ca n mee t the sho c k an d vib r a t io n specifica t ions liste d in th is ma nu al. 9.5 grounding sig nal g r ou nd ( p cba) and hda gr ou nd a r e con n e c ted to geth e r in th e dr ive and ca nn ot b e sep a r a ted b y th e u s e r . t he equ ipme nt in wh ich the dr ive is m oun te d is co nn ec te d d i re ctly t o th e hd a an d pc ba w i th n o e l e c tr i- cally is olating shock mount s . if it is des i red for th e system cha s sis to no t be con nected to th e hda/pcba g r o und , the syste ms in te gr ator o r use r must pr ovide a nonc onduc t ive (electrically is olatin g) me thod o f m oun t- in g th e dr ive in th e ho st equ ipme nt. incr eased r a d i ated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive gr ound. this is the system designer? s and integrator?s responsibility. k * x = f < 15lb = 67n
cheetah 15k.5 scsi product manual, rev. j 45 10.0 interface requirements this section partially describes the interface requirements as implemented on the drives. 10.1 general description this s e c t ion des c ribes in ess e ntially g ene ra l te rm s the inter f ace r equ ire m en t s su ppo rted by the ch eet a h 1 5 k.5 scsi. no a t te mpt is mad e to d e scrib e all of the m i nute de t a ils of con d ition s an d co nstr ain t s tha t mu st be con- side re d by d e sign ers whe n d e sign ing a system in which this fam ily o f dr ive s ca n pr op er ly o p e r a t e . se aga te d e clar es that the dr ives op er ate in accor dan ce with the ap pro p r i ate ansi s t an dar ds r e fer ence d in va rio u s p l aces he re in, with excep t io ns as n o ted her ein or in the sea gate par a lle l scsi inter f ace man ual and the scsi com m an ds refe ren ce man ual . 10 .2 scsi interface mess ages s upported t a b l e 7 list s the me ssa ges su pp orte d by the ch eet a h 15 k.5 scsi fami ly dr ives. t a ble 7: scsi mes sag es s uppor te d b y ch eet ah 15 k.5 scsi f a mily d r iv es mess ag e nam e me ssag e co de s upp orte d (y = ye s) (n = n o ) abort 0 6h y abort-t a g 0 dh y bus device re se t 0 ch y clear aca 1 6h n clear que ue 0 e h y command complete 00h y co n t in ue i/ o pr oc es s 1 2 h n dis co nn ec t 0 4 h y exte nde d messag e s 0 1h [1 ] y id e n t i fy 80 h- f f h y igno re wide r e sid ue (two bytes) 2 3 h y initiate rec o very 0fh n initiator d e tected er ro r 0 5h y l i nk ed co m m a n d co mp le te 0ah y l i nk ed co m m a n d co mp le te with f l ag 0bh y messag e p a rity e r r o r 0 9h y message reject 07h y modify dat a pointer [ 1] n no o p e r a t i on 08 h y p a r a lle l pr ot oc ol r e q u e st [1] [2 ] y qu eue t a g me ssag es (two byte s) ac a 2 4h n he ad o f qu eue t ag 2 1h y
46 cheetah 15k.5 scsi product manual, rev. j notes. [1] extended messages (see the scsi interface product manual ). [2] supports all options except qas_req and iu_req. 10.3 scsi interface commands supported t a b l e 8 following list s th e scsi inter f a c e co mma nds th at are su ppo rted b y the d r ive. oem standard drives are shipped set to operate in ultra320 mode. or der ed q ueu e t a g 22h y sim p le q ueu e t a g 20h y q u ic k ar bit r a t io n an d se lect ion ( q as ) 5 5 h y releas e recov e ry 10h n re st or e po int e r s 0 3 h y save da t a po inter 02h y sy nch r on ou s da t a tr an sfe r re q. [ 1 ] y t a rg et tr an sfer disabl e 13h n t e rm ina t e i/o pr ocess 1 1 h n wide da t a tra n sfe r requ est [ 1 ] y t a ble 8: comman d s sup port e d by che e t a h 15k.5 scsi fa mily drive co mmand name co mmand c o d e su pp or ted by scsi-2/3 chan ge definitio n 40h n comp ar e 39h n copy 18h n copy an d v e r i fy 3ah n format unit [1] 04h y d p r y bit supported n dcr t bit su ppo rted y s t pf bit su pp or te d y ip bit su ppo rted y dsp bit su ppo rted y im med bit supp or te d y v s (v endor spec ific) n inqu iry 12h y da te co de p age (c1h ) y de vice beh a vior p a ge ( c 3 h ) y firm wa re num ber s p a g e (c0 h ) y im plem ented ope r a t in g de f p a g e (8 1h) y ju mpe r settings p a ge ( c 2h) y su pp or te d v i t a l prod uct dat a p a ge ( 00h ) y un it ser i al numb er p a g e (8 0h ) y t a ble 7: scsi mes sag es s uppor te d b y ch eet ah 15 k.5 scsi f a mily d r iv es mess ag e name me ssag e co de s upp orte d (y = ye s) (n = n o )
cheetah 15k.5 scsi product manual, rev. j 47 lo ck- unlo c k cache 36h n lo g select 4ch y p cr bit y du bi t n ds bi t y tsd bit y et c bi t n tmc b i t n lp bit n lo g sense 4 dh y a p plication c lient log p a ge (0fh) y ba ckgr ou nd me dium scan p a ge ( 15h ) y bu f f e r over -r un /und er -r un p a g e (0 1h) n ca ch e s t atistics p a g e (3 7h ) y factory lo g p a ge ( 3 eh) y last n de fe rr ed er ro rs o r asyn ch ro nou s even t s p a g e (0bh ) n last n er ro r event s p age ( 0 7 h ) n no n- med i um err o r p a ge ( 06h ) y pa ge s sup por ted list ( 0 0 h ) y re ad er ror co un te r p age ( 0 3 h ) y re ad rever se err o r cou n ter p a g e (0 4h ) n s e lf-test result s p age (10h) y s t a r t- stop cycle co un te r p age ( 0 eh ) y t e m p er at ur e p a ge ( 0 d h ) y v e rif y er ro r co un te r p a ge ( 0 5 h ) y w r ite er ror co un te r p age ( 02 h) y mod e sele ct (sam e p a ges as mod e sense 1 a h ) 15h y [2] mod e sele ct (1 0) ( s a m e p a g e s a s mo de sen se 1ah) 55h y mode sense 1 ah y [2] c a c h in g par a me te rs p a ge ( 0 8h ) y co ntro l m ode p a ge ( 0 ah) y disconn ect/reco nne ct (0 2h) y e rro r re co ve ry p a ge ( 0 1 h ) y for m at p a ge ( 0 3 h ) y in fo rma tion exce ption s contr o l p a ge ( 1 ch) y backg r o und scan m ode su bp age (01 h ) y no tch a nd par t itio n page ( 0 ch) n po rt co ntro l pa ge ( 19 h) y p o wer condition p a ge (1ah) y t a ble 8: comman d s sup port e d by che e t a h 15k.5 scsi fa mily drive (cont in ued) co mmand name co mma nd c o de su ppor ted by sc si-2/3
48 cheetah 15k.5 scsi product manual, rev. j rig i d disc dr ive geo m etr y p a g e (0 4h) y un it atte ntion p a g e (0 0h) y v e rif y er ro r re co ve ry p a g e ( 0 7 h ) y x o r control p age (10h) n m o de se ns e (1 0) ( sam e p a g e s a s m o de se ns e 1ah ) 5 a h y pr ef et ch 3 4 h n read 08h y read bu f f er (mo de s 0, 2, 3, ah a nd bh supp or te d) 3ch y read ca p a city 25h y read de fe ct da t a (1 0) 37h y read de fe ct da t a (1 2) b7h y read extend ed 28h y d p o bit supported y fua bi t supp or te d y read l o n g 3eh y reassign blo c ks 07h y receive diagnostic result s 1 ch y su pp or te d dia g n o stics p a ges (0 0h) y t r a n slate p a g e (40h) y releas e 17h y re le as e ( 1 0) 5 7 h y requ est sen se 03h y a ctual retry count by tes y exten ded se nse y f i e l d poin te r by te s y reser v e 16h y 3rd pa rty re se rve y e xte nt re se rv atio n n re se rv e (1 0) 5 6 h y 3rd pa rty re se rve y e xte nt re se rv atio n n rezero u n it 01h y search dat a equal 31h n search dat a high 30h n sea r ch dat a low 32h n seek 0bh y seek extended 2 bh y send d i agnostics 1 dh y su pp or te d dia g n o stics p a ges (0 0h) y t a ble 8: comman d s sup port e d by che e t a h 15k.5 scsi fa mily drive (cont in ued) co mmand name co mma nd c o d e su pp or ted by scsi-2/3
cheetah 15k.5 scsi product manual, rev. j 49 [1] the drive can format to any even number of bytes per sector from 512 to 528. [2] tables 10 show how individual bits are set and which are changeable by the host. [3] warning: a power loss during flash programming can resu lt in firmware corruption. this usually makes the drive inoperable. t r a n slate p a g e (4 0h) y set limit s 33h n s t ar t unit/s to p un it ( s p i nd le ce ases rot a ting) 1bh y syn chro n ize cache 35h y t e st unit re ady 00h y ve r i f y 2 f h y by t c h k bi t y wr i t e 0 a h y w r ite an d v e r i fy 2eh y dpo b i t y w r ite buf f er ( m od es 0 , 2 , supp or te d) 3bh y firmw a re download option (mo des 5, 7, ah a nd bh sup por ted) [3 ] y w r ite exte nde d 2 ah y dpo b i t y fua bit y w r ite lo ng 3fh y w r ite same 41h y pb d a t a n lbda t a n xdre ad 52h n xdw r ite 50h n xpw rite 51h n t a ble 8: comman d s sup port e d by che e t a h 15k.5 scsi fa mily drive (cont in ued) co mmand name co mma nd c o de su ppor ted by sc si-2/3
50 cheetah 15k.5 scsi product manual, rev. j t a b l e 9 list s the s t an dar d in qui ry comm and d a t a th at the d r ive sh ould r e tur n to the initiator p e r the fo rm at give n in the scsi interface product manual, part number 100293069, inquiry command section. [ ] 1 03 means scsi-3 (ultra160) implemented. note. seagate has chosen to set this bit to 03, scsi-3 (ultra160) implemented, rather than 04, scsi-4 (ultra320) implemented, due to compatibility issues with some host bus adapters. this setting will not affect the ultra320 f unctionality of the drive. [ ] 2 the drive can be changed betwee n these two configurations: 02 means response data in scsi-2/scsi-3 format. 12 means the drive uses the hierarchical addressing mode to assign luns to logical units (default is 12). r# four ascii digits representing the last four digits of the product firmware release number. this informa - tion is also given in the vital product data pa ge c0h, together with servo ram and rom release num - bers. s# eight ascii digits representing the ei ght digits of the product serial number. [ ] 3 byte s 1 8 th ro ugh 2 6 re fle c t mod e l of dr ive . th e t able a b o v e sho w s the he x valu es for m ode l st3300655lw. refer to the values below for the values of bytes 18 through 26 of you particular model: s t 3 3 0 0 6 5 5 l w 3 33 33 03 03 63 5354c57 st3 300 65 5lc 33 33 30 30 36 35 35 4c 43 s t 3 1 4 6 8 5 5 l w 3 33 13 53 63 83 5354c57 st3 146 85 5lc 33 31 35 36 38 35 35 4c 43 st3 734 55 l w 33 37 33 34 35 35 4c 57 20 st3 734 55 lc 33 37 33 34 35 35 4c 43 20 [ ] 4 copyright year - the year the drive?s firmware code was built. 10.3.1 inquiry vital product data instead o f the st an da rd inq u iry da t a sh own in t able 9 , the in itia to r can r equ est sever a l v i t a l pro duct dat a p a g e s by se tting th e inq u iry comm and evpd bit to on e. the scsi co mman d s refere nce ma nu al l i s ts t h e vi ta l pr odu ct dat a p a ge s a n d describ es th eir form at s. a se p a ra te in qui ry comma nd must be se nt to th e d r ive for each vital product data page the init iator wants the drive to send back. t a ble 9: che e t a h 1 5 k.5 scsi fam ily drive s t andard i n quiry dat a b y t e s d at a (h ex) 0-15 00 00 [03] 1 [12] 2 8b 00 01 3e 53 45 41 47 41 54 45 20 vendor id 16-31 53 54 [33] [33] [30] [3 0] [36] [35 ] [35] [4c] [57] 3 20 2 0 20 20 20 product id 32-47 r# r# r# r# s# s# s# s# s# s# s# s# 00 00 00 00 48-63 00 00 00 00 00 0 0 00 00 00 00 00 00 0 0 00 00 00 64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80-95 00 00 00 00 00 0 0 00 00 00 00 00 00 0 0 00 00 00 96-111 00 43 6f 70 79 72 69 67 68 74 20 28 63 29 20 [y] copyright 112-127 [y] [ y] [y] 4 20 53 6 5 61 67 61 74 65 20 4 1 6c 6c 20 no tice 128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20
cheetah 15k.5 scsi product manual, rev. j 51 10.3.2 mode sense data th e m ode sense co mma nd pro v ides a mea n s for th e d r ive to r e po rt it s op er a t ing p a ra meters to the initiator . th e d r ive main t a in s fo ur set s of m ode p a r a me te rs, de fault va lues, saved value s , cu rr ent va lues a nd ch an ge- able values. defau l t va lues a r e har d cod e d in the drive fir m war e th a t is stor ed in fl ash eprom n onvol atile me mor y on the d r ive pcba. defaul t valu es can be cha nge d on ly b y d o wn lo adin g a comp lete set of new firmwar e in to th e fla s h eprom. an in itiator can r equ est a nd re ce ive fr om the dr iv e a li st o f de fault va lues an d u s e th ose in a mod e sele ct comm and to set up ne w cur r e n t and save d va lues, wh er e th e va lue s ar e chan ge able . save d val ues a r e store d on the disc me dia using a mo de sele ct co mman d . only p a r a m e ter value s that ar e a llowed to be cha nge d can be cha nge d b y th is metho d . see ? c h ang ea ble va lues? de fin e d be low . par a me te rs in th e s a v e d va lu es list tha t ar e no t c h a n g e a b l e by th e m ode se lect com m an d ge t their va lue s fro m th e de fa ult va lue s sto r a g e . cu rr en t va lue s ar e vo lat ile va lue s cu rr en tly be in g us ed b y th e dr ive t o co ntr o l it s op e r a tio n. a mo de sele ct co mma nd can be u s e d to cha n g e th ese va l ues (o nly tho s e tha t ar e ch an gea ble ) . orig inally , th ey are installed fro m sa ved or defau lt valu es a f ter a p o we r on res e t , hard reset, or bus d e v i ce reset message. cha nge ab le valu es for m a bit ma sk, sto r e d in no nvola t ile m e m o ry , t h a t d i ct at es w h ic h o f th e cu rr en t va lu es a n d saved va lue s can b e cha nge d by a mo de se lect com m an d. a ? o n e ? a llows a ch an ge to a co rr espon din g bit; a ? z e r o ? allo ws n o ch an ge. f o r exam ple , in t a ble 10 r e fe r to mod e p a ge 01 , in th e r o w entitled ? c hg? . th ese ar e h e x nu mbe r s re pr esen tin g the ch ang ea ble va lues for mod e p a g e 0 1 . note tha t b y te s 0 4 , 05 , 0 6 , an d 0 7 ar e n o t cha nge ab le, be ca use tho s e field s are all ze ro s. if some ch an gea ble co de ha d a hex valu e ef , that e qua tes to the bin a r y p a tter n 1 1 1 0 1 1 1 1 . if ther e is a zer o in an y bit po sitio n in th e fie l d, it mea n s tha t b i t is no t ch ang eab le. bit s 7, 6 , 5, 3, 2, 1 , an d 0 ar e chan ge able , b e c ause tho s e b i t s a r e a ll o nes. bit 4 is n o t ch ang eab le. th ou gh th e dri v e always r e p o r t s non -zer o va lue s in b yte s 00 an d 0 1 , tho s e p a r t icu l ar bytes a r e ne ve r ch an ge- ab le . th e chan ge able valu es list ca n on ly be ch ang ed b y do wn loa d ing n e w fir m war e into the flash eprom. on st and ar d oem drive s the saved va lues a r e t a ken fr om the defau lt va lues list and stor ed into the sa ve d val- u e s stor ag e location o n the m edia p r io r to shipp i ng . whe n a dr ive is p o wer ed u p , it t a ke s saved va lues fr om th e me dia a nd sto r es th em to th e cu rr ent va lue s sto r ag e in vo latile memory . it is not poss ible t o ch an g e th e cu rr en t valu es (o r th e saved value s ) with a mod e se lect co mma nd b e for e the dr ive is u p to spe e d an d is ? r ea dy .? an a t tem p t to do so r e sult s in a ?ch e ck con d ition st atus bein g re turn ed . note . beca use th er e m ay be several different versions of drive control firmware in the total population of drives in the field, the mode se nse values given in the following ta bles may not exactly match those of some drives. th e follo win g t a b l es list the valu es of th e da t a bytes re tur n e d by the d r ive in r e spo n se to the mo de se nse com- ma nd p a g e s fo r scsi ultr a16 0 imp l eme n t a tion ( s ee the scsi com m an ds refer e n c e man ual ). definitions: sa v = current saved value. def = defau l t valu e. s t a nda rd d r ives ar e sh ipp ed con f ig ur ed this wa y . chg= ch ang eab le bit s ; in dicates if cur r e n t a n d save d va lues ar e chan gea ble . note . save d va lues for oem d rives are norma lly the same as the default values.
52 cheetah 15k.5 scsi product manual, rev. j t a ble 10 : st3300655 mode sense data mod e sense header d ata ab 00 10 08 22 ec b 2 5c 00 00 02 00 mod e sense pages da ta sav 81 0a c 0 0b ff 00 00 00 05 00 ff ff def 81 0a c 0 0b ff 00 00 00 05 00 ff ff chg 81 0a f f ff 00 00 00 00 ff 00 ff ff sav 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 def 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 chg 82 0e f f ff 00 00 00 00 00 00 ff ff 87 0 0 00 00 sav 83 16 6 8 58 00 00 00 38 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 def 83 16 6 8 58 00 00 00 38 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 chg 83 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 84 16 0 1 22 64 08 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 def 84 16 0 1 22 64 08 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 chg 84 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 87 0a 0 0 0b ff 00 00 00 00 00 ff ff def 87 0a 0 0 0b ff 00 00 00 00 00 ff ff chg 87 0a 0 f ff 00 00 00 00 00 00 ff ff sav 88 12 1 4 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 def 88 12 1 4 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 chg 88 12 a 5 00 00 00 ff ff ff ff 00 00 20 0 0 00 00 00 00 00 00 sav 8a 0a 0 2 00 00 00 00 00 00 00 0f 0c def 8a 0a 0 2 00 00 00 00 00 00 00 0f 0c chg 8a 0a 0 3 f0 00 00 00 00 00 00 00 00 sav 19 06 0 1 00 ff ff 00 00 def 19 06 0 1 00 ff ff 00 00 chg 19 06 0 0 00 ff ff 00 00 sav 9a 0a 0 0 02 00 00 00 0a 00 00 00 04 def 9a 0a 0 0 02 00 00 00 05 00 00 00 04 chg 9a 0a 0 0 03 ff ff ff ff 00 00 00 00 sav 9c 0a 1 0 00 00 00 00 00 00 00 00 01 def 9c 0a 1 0 00 00 00 00 00 00 00 00 01 chg 9c 0a 9 d 0f ff ff ff ff ff ff ff ff sav 80 06 0 0 00 0f 00 00 00 def 80 06 0 0 00 0f 00 00 00 chg 80 06 f 7 40 0f 00 00 00 rea d capaci ty data 22 ec b2 5b 00 00 0 2 00
cheetah 15k.5 scsi product manual, rev. j 53 t a ble 1 1 : st3146855 mode sense data mod e sense header d ata ab 00 10 08 11 17 7 3 30 00 0 0 02 00 mod e sense pages da ta sav 81 0a c 0 0b ff 00 00 00 05 00 ff ff def 81 0a c 0 0b ff 00 00 00 05 00 ff ff chg 81 0a f f ff 00 00 00 00 ff 00 ff ff sav 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 def 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 chg 82 0e f f ff 00 00 00 00 00 00 ff ff 87 0 0 00 00 sav 83 16 3 4 2c 00 00 00 1c 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 def 83 16 3 4 2c 00 00 00 1c 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 chg 83 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 84 16 0 1 22 64 04 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 def 84 16 0 1 22 64 04 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 chg 84 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 87 0a 0 0 0b ff 00 00 00 00 00 ff ff def 87 0a 0 0 0b ff 00 00 00 00 00 ff ff chg 87 0a 0 f ff 00 00 00 00 00 00 ff ff sav 88 12 1 0 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 def 88 12 1 4 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 chg 88 12 a 5 00 00 00 ff ff ff ff 00 00 20 0 0 00 00 00 00 00 00 sav 8a 0a 0 2 00 00 00 00 00 00 00 05 57 def 8a 0a 0 2 00 00 00 00 00 00 00 05 57 chg 8a 0a 0 3 f0 00 00 00 00 00 00 00 00 sav 19 06 0 1 00 ff ff 00 00 def 19 06 0 1 00 ff ff 00 00 chg 19 06 0 0 00 ff ff 00 00 sav 9a 0a 0 0 02 00 00 00 0a 00 00 00 04 def 9a 0a 0 0 02 00 00 00 05 00 00 00 04 chg 9a 0a 0 0 03 ff ff ff ff 00 00 00 00 sav 9c 0a 1 0 00 00 00 00 00 00 00 00 01 def 9c 0a 1 0 00 00 00 00 00 00 00 00 01 chg 9c 0a 9 d 0f ff ff ff ff ff ff ff ff sav 80 06 0 0 00 0f 00 00 00 def 80 06 0 0 00 0f 00 00 00 chg 80 06 f 7 40 0f 00 00 00 rea d capaci ty data 11 17 73 2f 00 00 0 2 00
54 cheetah 15k.5 scsi product manual, rev. j t a ble 12 : st373455 mode sense data mod e sense header d ata ab 00 10 08 08 8b b 9 98 00 00 02 00 mod e sense pages da ta sav 81 0a c 0 0b ff 00 00 00 05 00 ff ff def 81 0a c 0 0b ff 00 00 00 05 00 ff ff chg 81 0a f f ff 00 00 00 00 ff 00 ff ff sav 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 def 82 0e 8 0 80 00 0a 00 00 00 00 00 00 00 0 0 00 00 chg 82 0e f f ff 00 00 00 00 00 00 ff ff 87 0 0 00 00 sav 83 16 1 a 16 00 00 00 0e 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 def 83 16 1 a 16 00 00 00 0e 00 00 03 da 02 0 0 00 01 00 e6 00 aa 40 0 0 00 00 chg 83 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 84 16 0 1 22 64 02 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 def 84 16 0 1 22 64 02 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 3a a 7 00 00 chg 84 16 0 0 00 00 00 00 00 00 00 00 00 00 0 0 00 00 00 00 00 00 00 0 0 00 00 sav 87 0a 0 0 0b ff 00 00 00 00 00 ff ff def 87 0a 0 0 0b ff 00 00 00 00 00 ff ff chg 87 0a 0 f ff 00 00 00 00 00 00 ff ff sav 88 12 1 4 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 def 88 12 1 4 00 ff ff 00 00 ff ff ff ff 80 2 0 00 00 00 00 00 00 chg 88 12 a 5 00 00 00 ff ff ff ff 00 00 20 0 0 00 00 00 00 00 00 sav 8a 0a 0 2 00 00 00 00 00 00 00 02 d1 def 8a 0a 0 2 00 00 00 00 00 00 00 02 d1 chg 8a 0a 0 3 f0 00 00 00 00 00 00 00 00 sav 19 06 0 1 00 ff ff 00 00 def 19 06 0 1 00 ff ff 00 00 chg 19 06 0 0 00 ff ff 00 00 sav 9a 0a 0 0 02 00 00 00 0a 00 00 00 04 def 9a 0a 0 0 02 00 00 00 05 00 00 00 04 chg 9a 0a 0 0 03 ff ff ff ff 00 00 00 00 sav 9c 0a 1 0 00 00 00 00 00 00 00 00 01 def 9c 0a 1 0 00 00 00 00 00 00 00 00 01 chg 9c 0a 9 d 0f ff ff ff ff ff ff ff ff sav 80 06 0 0 00 0f 00 00 00 def 80 06 0 0 00 0f 00 00 00 chg 80 06 f 7 40 0f 00 00 00 rea d capaci ty data 08 8b b9 97 00 00 0 2 00
cheetah 15k.5 scsi product manual, rev. j 55 10.4 scsi bus conditions and miscellaneous features supported asynchronous scsi bus conditions supported by the driv e are listed below. these conditions cause the scsi device to perform certain actions and can alter the sc si bus phase sequence. othe r miscellaneous operating features supported are also listed here. refer to the parallel scsi interface manual and the scsi commands reference manual for details. table 13: scsi bus conditions and other miscellaneous features co nd itio n/ fe at ur e su pp or te d by : su pp orte d c o n d i ti on s or fea t ure y a dap ti ve c a chin g y a rbitrating system y a synchronous dat a t r ansfer n a synchron ous eve n t n o ti fi ca ti on y a tten ti on con d ition n a uto contin gent alleg i an ce c ondi ti on y con ti ngen t alle gia n ce cond ition y d eferred error handling y discon nect/r e conn ect n high vo lt age di f f eren tial (hvd) interface avail abl e y low vol t a ge dif f eren ti al (l vd) i n terfa ce avail able y p arameter rou ndin g (co n trolled b y the ro und bi t in mode se lect p age 0) y q u eue t agging (up to 64 queue t ags supp orted) y r ep orti ng actual retry co unt in exten ded sense byte s 15 , 16 a nd 17. y r ese t con d ition y s egmen te d cachi n g y s ynchron ous dat a t r ansfer n z e r o latency rea d su pp orte d s t a tu s yg o o d y c he ck co nditio n y c on dition met/goo d yb u sy y i nte r me dia t e/good y i nte r me dia t e/co nditio n me t/go od y r ese r va ti on confli ct y q u eue f ull n a ca a ctive
56 cheetah 15k.5 scsi product manual, rev. j 10.5 synchronous data transfer the data transfer period to be used by the drive and th e initiator is established by an exchange of messages during the message phase of operation. see the section on message protocol in the parallel scsi interface manual and scsi commands reference manual . 10.5.1 synchronous data transfer periods supported in th e follo win g t able s , m is th e synchr o n ous p e r i od va lu e (in the tr an sfer r a te n e g o tiation messag e ) th at r epr e- se nt s th e as so ciat ed t r a n s f e r p e r io d an d tr an sfe r ra te va lu es . table 14 lists the synchronous data transfer periods supported by the drive in dt data phase. dt data phase is only allowed when using the lvd interface. t a ble 14 : synchronous dt data transfer periods t a b l e 15 list s th e synchr on ous dat a tra n sfer pe rio d s sup por ted by the d r ive in st da t a ph ase. st da t a pha se is allowed with either lvd or se interface except as noted. t a ble 15 : syn c hro nous st da t a tr ans f e r p e riods 10.5.2 req/ack offset cheetah 15k.5 scsi family drives support req/ack offset values from 7 to 63 (3fh). offsets of 1 through 6 are negotiated to 0 (asynchronous transfer). 10.6 physical interface th is se ctio n d e scr i be s th e con n e c tor s , ca bles, signa ls , te rmin a tor s and bu s tim i ng of the dc a nd scsi i/o in te rface. see section 1 0 .8 an d se ctio n 10.9 for add itio na l ter m ina t or in fo rma tio n . fig u r e s 13 a nd 1 4 show the lo ca tio n s of th e dc p o wer co nne cto r , scsi inter f ace conn ector , d r ive sele ct he ad- e r s, a nd op ti on select hea der s. det a ils of the ph ysical, e l ectrical and log i cal cha r a c te rist ics are given in s e c t ions follow i ng, while the sc si operational aspects of seagate drive interfaces are given in the parallel scsi in terface manual . m (decimal) t r an sfer p e riod (nanoseconds) transfer rate (megatransfers/second) transfer rate (mbytes/second) on wide bus 8 6.25 160.0 320.0 9 12.5 80.0 160.0 10 25 40.0 80.0 12 50 20.0 40.0 25 100 10.0 20.0 m (decimal) t r a n sfer p e rio d (nanoseconds) transfer rate (megatransfers/second) 10 25 40.0 1 1. this transfer rate is only a llowed when using the lvd interface. 12 50 20.0 25 100 10.0 50 200 5.0
cheetah 15k.5 scsi product manual, rev. j 57 10.6.1 dc cable and connector l w mod e l d r ives r e ceive dc po we r thr o u gh a 4- pin conn ecto r ( s ee figu re 15 for pi n assign men t ) mou n ted at the re ar of th e m a in pcba. re co mme nde d p a r t num ber s of the m a ting co nne cto r ar e l i sted be low , but eq uiva- le nt p a r t s m a y be used . l c mo del dr ives rece ive p o wer thr o u g h the 8 0 - p in i/o co nne cto r . see t able s 1 9 and 20. figu re 1 3 . l w m o d e l d r ive ph ysica l inte r f a c e (68-p i n j1 scsi i/o con n e c tor ) t yp e of cab le co nn ec to r c o n t act s (20-1 4 a w g) 14 a w g m p 1-4 8 0 424 -0 amp 60 619 -4 ( l o o se piece) amp 61 1 17- 4 ( s tr ip) j5 pin 1a 68 pin scsi i/o connector pin 1p j1-dc power j1 pin 1 j1-dc power pin 1p 2p 3p 4p power +12v +12v ret + 5v ret + 5v j1 pin 1 1p 2p 3p 4p j5 pin 1a pcb
58 cheetah 15k.5 scsi product manual, rev. j figure 14. lc model drive physical interface (80-pin j1 scsi i/o connector) 10.6.2 scsi interface physical description che e t a h 1 5 k.5 scsi d r ives su pp ort th e physical inter f ac e re qu ir em e n t s of t h e u l tra 3 2 0 sc si p a r a lle l i n t e r - face- 4 (spi-4 ), a nd op era t e com p a t ib ly at the in te rfac e with de vi ce s th at sup por t ea rlie r scsi-2 a nd scsi- 3 st an dar ds. it shou ld be note d th at this i s on ly tr ue if the system s e ngin e e r in g ha s b een co rr ectly do ne , a nd if e a r lier scsi- 2 an d scsi-3 d e vice s r e spon d in an a c cep t ab le man ner ( p e r ap plicab le scsi s t a nda rd s) to r e ject n e wer ultra 320 p r o t o c ol exte nsion s tha t they do n?t sup p o r t. th e dr ive s d o cume nted in this m anu al supp or t single - e nde d an d low volt a g e d i f f er en tia l p h ysi c a l in te rcon nect s (h er e a f te r re fe rr ed to as se a n d l v d, re sp ec tive ly) as de scr ibe d in t h e co rr es po n d in g a n si spi do cu m e n t r e f - e r e n ced in the pr eced ing p a r a g r a ph. the s e d r ives impl e m en t dr iver a nd re ceiver circu i t s that ca n op era t e ei th er se or l v d. however , th ey can n o t switch dyna mically b e tween se an d l v d op era t ion. th e d r ives typ i ca lly ope ra te on a bus with othe r scsi d e vices. all d e vices on the bu s m u st o per ate in th e sam e mo de , e i ther se or l v d, b u t no t a mixtur e of the s e . all sig n a l s on th e bu s ar e comm on betwee n al l devices on th e b u s . t h is bu s m u s t be te rm in at ed at bo th en d s with th e p r o p e r imp e d a n c e in or de r t o o p e r ate co rr ec tly . do no t te r m in at e in te rm e d ia te s c si dev i ces . in some cases , the scs i d e vices at e a ch e nd have onb oa rd te rm ina- tion cir c u i t s tha t can b e en able d by inst alla tio n of a jum per plug ( te ) o n the d e vice . th ese ter m ina t io n circuit s r e ceive power fro m e i th er a so ur ce inte rna l to th e d e vice , or from a line in the inte rface ca ble spec ific ally pow - e r e d fo r th at p u r pose. lc a n d l w mo de l d r ives d o no t ha ve o nbo ar d te rmin a tion circu i t s . so me typ e of e xte rna l ter m ina t ion cir c u i t s must be pr ovide d for these drive s b y th e e nd user or de sig ner s of the equ ipme nt into wh ich the drives will be integrated. see the ansi t10 s t andard referenced above for the maximum number of d e vice s tha t can successfu lly op er ate at va rio u s int e r f a ce tr an sfe r ra te s o n se an d l v d bu se s. l c mod e l d r ives p l ug into pcba or bu lkh ead con nector s in the ho st . th e y ma y be co nn ec te d in a da isy ch a i n b y the host backpla ne wirin g or pcba circu i t r uns that ha ve ade qu ate dc cur r e n t ca rr ying cap a city to su ppo rt the n u mb er o f dr ives p l ug ged in to th e pcba or b u lkhe ad con nector s . a sing le 80 -p in i/o connector cab l e can- n o t supp or t th e dc cu rr en t n e e d s of sever a l d r ives, so no cab l es be yo nd th e b u lkhea d con n e c tor s sh ou ld b e us ed . a sin g le d r iv e co nn ec te d via a ca ble to a h o st 8 0 - p i n i/o c o n n e ct o r is no t r e com m e nd ed . j6 80-pin scsi i/o connector pin 1
cheetah 15k.5 scsi product manual, rev. j 59 table 16 shows the interface transfer rates supported by the various drive models defined in this manual. 10.6.3 scsi interface cable requirements the characteristics of cables used to connect parallel in terface drives are discussed in the ansi standards ref - erenced in this section. 10.6.3.1 cable requirements the characteristics of cables used to connect ultra320 scsi parallel interface devices are discussed in detail in section 6 of ansi standard t10/1365d rev. 3. the cable characteristics that must be considered when interconnecting the drives described in this manual in a ultra320 scsi parallel, daisy-chain interconnected system are: ? characteristic impedance (see t 10/1365d sections 6.3.3 and 6.3.4) ? propagation delay (see t10/1365d sections 6.3.6 and 6.3.7) ? stub length (see t10/1365d section 6.9) ? device spacing (see t10/1365d section 6.9) t o min i m i ze d i sc on tin u a n c es an d s i gn al r e f l ec tion s, cab l es o f d i f f e r e n t impe da nces shou ld n o t be used in th e sam e bus. imp l eme n t a tio n s may re quir e tra de- of fs in sh ie ldin g ef fe ctiven ess, cabl e le n g t h , nu m b e r of lo ad s a nd sp acing , tr an sfer r a tes, and cost to achie v e satisf a c tor y system o p e r atio n. if shie lde d a nd u n shie lded cab l es are mixed within the sam e scsi bus, th e ef fect of imp eda nce misma t ch mu st be car e fully consid ere d . pr ope r im ped an ce matchin g is esp e cially imp o r t ant in or der to m a int a in a deq ua te mar g in at f a st -2 0, f ast - 40, fast-80, and fast-160 scsi transfer rates. note. for lvd operation, twisted pair cables are reco mmended. for lvd fast-40 operation, twisted pair cables are strongly recommended. for fast-80 and fast-160 operation, twisted pair cables are required . lc models the 80-pin connector option provided on lc models is in tended for use on drives that plug directly into back- plane connector in the host equipment. in such installations, all backplane wiring segments are subject to the electromagnetic concepts presented in standard t10/1365d , rev. 3, section 6. for lc model drives, installa- tions with connectors on cables are not recommended. 10.6.4 mating connectors part numbers for the different type connectors that mate with the various cheetah 15k.5 scsi i/o connectors are given in the sections following. t a ble 16 : int e rf ace tra n sf er ra te s supp ort e d inter f ace typ e / driv e mo de ls maxi m u m tran sfer r a te a syn chr o n o u s f ast-5 f ast-10 f a st-2 0 (ult ra) f ast-40 (u l t ra2) f ast-80 (ultra160) f ast-160 (ultra320 ) se st33 006 55 l w /lc st31 468 55 l w /lc st37 345 5l w/l c yes yes ye s y e s no no no l v d s t33 006 55 l w /lc st31 468 55 l w /lc st37 345 5l w/l c yes yes yes y es yes yes yes
60 cheetah 15k.5 scsi product manual, rev. j 10.6.4.1 mating connectors for lw model drives th e non sh ield ed ca ble co nn ecto r sh all b e a 6 8 con d u c tor co n nector consisting of two r o ws of 3 4 ma le co nt act s with adj acent co nt a c t s 0.05 0 inch (1 .2 7 mm) ap ar t. recommended mating flat cable connector part numbers are: [1] see figure 15 . th e dr ive de vi ce conn ector is a no nshi eld e d 68 con ductor con nector con s isti ng of two rows o f 34 fema le p i ns with adjacent pins 50 mils apart. the connector is keyed by means of its shape (see figure 16). 10.6.4.2 mating connectors for lc model drives th e n onsh i elde d con nector shall b e a n 8 0 -co ndu cto r con nec tor co nsistin g o f two r o ws of 40 cont a c t s with a d ja- cen t con t act s 5 0 (1 .27 mm ) mils ap ar t ( s ee fig u r e 17 ). i/o conn e c tion using a ca ble is not r e comme nd ed. th e le ngth a nd size of the h o st e q u i pme n t dc po we r car r yi ng co nd ucto rs fr om th e dc p o wer so urce to the host e quip m en t 8 0 -p in disc d r ive in te rface conn ector ( s) sho u ld be strictly d e signe d accor d ing to p r o per power tr an s- mission design c o ncept s . no pos s ibility for the equipment user to att a ch an 80-pin cable/c o nnec t or should be allo we d, s i nce th e len g t h of t h e d c p o w er c a r r y i ng co nd ucto rs co uld no t be con t r o lle d and the r e f o r e coul d b e c o me to o lon g f o r s a f e p o wer tr an sm iss i on to th e dr ive. multiconn ecto r 8 0 - c o ndu cto r cable s sho u ld espe- cially no t b e allo we d, sin c e th e po we r- carr ying con d u c tor s o n the 8 0 - c o ndu cto r inter f ace wer e not inten d e d to sup por t a se ries of dr ive s . to in su re th at b o th d r ive con nector a n d h o st equ ipme nt m a tin g c o n n e ct or m a t e p r op er ly , b o t h dr ive co nn ec to r a nd ho st e q u i pme n t ma tin g co nne cto r m u st me et t he pr ovisions of ? s f f -8 45 1 s p ecifica t io n fo r sca- 2 unshielded c o nnections.? t o obt a in this spec ification, visit the follow i ng w e b site: www .sf f committee.org amp mo del 7 860 96- 7 f em ale, 68 -pin , p a n e l mou n t amp mo del 7 860 90- 7 f em ale, 68 -pin , cab l e mou n t amp mo del 7 499 25- 5 ( 5 0 mil co nd ucto r cente r s, 2 8 or 3 0 a w g wir e ) use two, 34 con ductor , 50 mil ce nter flat cab l e with thi s co nne cto r . this typ e co nn ecto r can on ly b e used o n ca ble e nds. [1 ] amp mo del 8 8 -5 87 0- 294 -5 w/o s t ra in relief (2 5 mil co nd ucto r cente r s, 3 0 a w g wir e) . use eithe r on cable e nds o r in ca ble midd le se ctio n for d a isy- chain ins t alla tio n s [1 ]. amp mo del 1 - 48 04 20- 0 p ower con n e c tor 4 cir cuit h o u s in g ber g 69307 -0 12 12 -po s itio n, 2 x 6, 2 mm re cept a c le h o u s in g
cheetah 15k.5 scsi product manual, rev. j 61 recom m en ded m a ting 8 0 - position pcba m oun t conn ector s : right -an g le to pcba con n ec tor s sea g a t e p/n: 77 67 855 9 am p us p/ n: 2- 55 7 1 0 1 - 1 amp jap a n p/n: 5 - 1 754 74 -9 fo r ad dition al infor m ation ca ll amp f ax ser v ice at 1 - 8 00- 52 2- 675 2. [1] closed end type 68-pin connector used. terminators enabled. [2] open end type (in-line application) connector used. [3] host need not be on the end of the daisy-chain. anot her device can be on the end with the terminator, the host having no terminator. [4] t ot a l in te rface cab l e leng th m u st no t excee d th at spec ified in ansi document t 10/13 65 d (in c ludin g host adapter/initiator). the cable length restrictio n limits the total number of devices allowed. [5] scsi id7 has highest arbitration priority, then id15 to id8 (id 8 has the very lowest priority). [6] last drive on the daisy chain. [7] open-end type 68-pin connector used. if end device, us e external terminator and closed-end type 68-pin connector. figure 15. scsi daisy-chain in terface cabling for lw drives s t r a i g h t -i n c o n n ec tor h ot pl ug vers i o n (wi t h g r ou n d gu id e-p i n ) sea gate p/n: 77 67 870 3 amp us p/n: or 2- 55 71 03- 1 94 -0 68 0-0 2 - 1 787 31 1- 1 with po lariza tio n amp us p/n: or 2- 55 71 03- 2 94 -0 68 0-0 2 - 2 787 31 1- 2 withou t p o lar i zation amp jap a n p/n: 5- 17 54 75- 9 host adapter pcb pin 1 (check your adapter for pin 1 location) [6] scsi id 1 scsi id 0 scsi id 7 [5] [1] [3] [2] 2 through x scsi devices [4] terminator [7] ?lw? model drive
62 cheetah 15k.5 scsi product manual, rev. j figure 16. nonshielded 68-pin scsi device connector used on lw drives .0787 (2.00) .519 (13.18) .315 (8.00) 3.650 (92.71) .840 ? .005 (21.34) .315 ? .010 (8.00) +.001 ?.002 dia .083 (2.1) trifurcated pins (4 places) .085 (2.16) x 45? chamfer typ .20 (5.08) typ .60 (15.24) .100 (2.54) pos. 1 pos. 2 1 2 3 4 1.816 (46.13) position 1 pos. 68 pos. 35 1.650 (41.91) .980 (24.89) 1.368 (37.74) .767 (19.48) .050 (1.27) .218 (5.54) pos. 1 .022 .050 .020 .047 .0787 .200 1.650 .3937 .600 .346 3.650?.005 .270 .1 5 5
cheetah 15k.5 scsi product manual, rev. j 63 figure 17. nonshielded 80-pin scsi sca-2 connector used on lc drives 7.00 (.276) 12.70 (.500) 2.15 +/- 0.10 2 places 57.87 +/- 0.2 (2.278 +/- .008) ? 0.15 (.0059) my m 62.15 +/- 0.15 (2.447 +/- 0.006) housing x x contact 0.3 (.012) mym 1.27 (.05) typ c l of datum y c l of datum y 0.50 (.020) pin 1 pin 40 pin 41 pin 80 pin 1 front view end v iew t op v iew back v iew insert mating i/o connector grounding pins grounding pins 0.15 (.0059) mym
64 cheetah 15k.5 scsi product manual, rev. j table 17: lw 68-conductor single-ended (se) p cable signal/pin assignments [11] note. a minus sign preceding a signal name in dicates that signal is active low. no te s [ ]: see p a ge following t a ble 20. signal name [1] connector contact number [3] cable conductor number [2] connector contact number [3] signal name [1] gnd 1 1 2 35 ?db12 gnd 2 3 4 36 ?db13 gnd 3 5 6 37 ?db14 gnd 4 7 8 38 ?db15 gnd 5 9 10 39 ?dbp1 gnd 6 11 12 40 ?db0 gnd 7 13 14 41 ?db1 gnd 8 15 16 42 ?db2 gnd 9 17 18 43 ?db3 gnd 10 19 20 44 ?db4 gnd 11 21 22 45 ?db5 gnd 12 23 24 46 ?db6 gnd 13 25 26 47 ?db7 gnd 14 27 28 48 ?dbp gnd 15 29 30 49 gnd gnd 16 31 32 50 gnd te r m p w r 17 33 34 51 termpwr te r m p w r 18 35 36 52 termpwr reserved 19 37 38 53 reserved gnd 20 39 40 54 gnd gnd 21 41 42 55 ?atn gnd 22 43 44 56 gnd gnd 23 45 46 57 ?bsy gnd 24 47 48 58 ?ack gnd 25 49 50 59 ?rst gnd 26 51 52 60 ?msg gnd 27 53 54 61 ?sel gnd 28 55 56 62 ?c/d gnd 29 57 58 63 ?req gnd 30 59 60 64 ?i/o gnd 31 61 62 65 ?db8 gnd 32 63 64 66 ?db9 gnd 33 65 66 67 ?db10 gnd 34 67 68 68 ?db11
cheetah 15k.5 scsi product manual, rev. j 65 table 18: lw 68-conductor lvd p cable signal/pin assignments [11] note . a m i n u s sig n pr ec ed ing a s i gn al na m e in dicates t h at signal is act i ve low . no te s [ ]: see p a ge following t a ble 20. signal name [1] connector contact number [3] cable conductor number [2] connector contact number [3] signal name [1] +db12 1 1 2 35 ?db12 +db13 2 3 4 36 ?db13 +db14 3 5 6 37 ?db14 +db15 4 7 8 38 ?db15 +dbp1 5 9 10 39 ?dbp1 +db0 6 11 12 40 ?db0 +db1 7 13 14 41 ?db1 +db2 8 15 16 42 ?db2 +db3 9 17 18 43 ?db3 +db4 10 19 20 44 ?db4 +db5 11 21 22 45 ?db5 +db6 12 23 24 46 ?db6 +db7 13 25 26 47 ?db7 +dbp 14 27 28 48 ?dbp ground 15 29 30 49 ground diffsns [8] 16 31 32 50 ground te r m p w r 17 33 34 51 termpwr te r m p w r 18 35 36 52 termpwr reserved 19 37 38 53 reserved ground 20 39 40 54 ground +atn 21 41 42 55 ?atn ground 22 43 44 56 ground +bsy 23 45 46 57 ?bsy +ack 24 47 48 58 ?ack +rst 25 49 50 59 ?rst +msg 26 51 52 60 ?msg +sel 27 53 54 61 ?sel +c/d 28 55 56 62 ?c/d +req 29 57 58 63 ?req +i/o 30 59 60 64 ?i/o +db8 31 61 62 65 ?db8 +db9 32 63 64 66 ?db9 +db10 33 65 66 67 ?db10 +db11 34 67 68 68 ?db11
66 cheetah 15k.5 scsi product manual, rev. j table 19: lc 80-pin single-ended (se) i/o connector pin assignments [11] note. a minus sign preceding a signal name in dicates that signal is active low. no te s [ ]: see p a ge following t a ble 20. signal name [1] connector contact number [3] signal number [3] contact name [1] 12 v charge 1 41 12 v gnd 12 v 2 42 12 v gnd 12 v 3 43 12 v gnd 12 v 4 44 mated 1 [12] nc [10] 5 45 nc [10] nc [10] 6 46 diffsns [8] ?db11 7 47 gnd ?db10 8 48 gnd ?db9 9 49 gnd ?db8 10 50 gnd ?i/o 11 51 gnd ?req 12 52 gnd ?c/d 13 53 gnd ?sel 14 54 gnd ?msg 15 55 gnd ?rst 16 56 gnd ?ack 17 57 gnd ?bsy 18 58 gnd ?atn 19 59 gnd ?dbp 20 60 gnd ?db7 21 61 gnd ?db6 22 62 gnd ?db5 23 63 gnd ?db4 24 64 gnd ?db3 25 65 gnd ?db2 26 66 gnd ?db1 27 67 gnd ?db0 28 68 gnd ?dp1 29 69 gnd ?db15 30 70 gnd ?db14 31 71 gnd ?db13 32 72 gnd ?db12 33 73 gnd +5 v 34 74 mated 2 +5 v 35 75 5 v gnd +5 v 36 76 5 v gnd nc [10] 37 77 active led out [4] [9] rmt-start [5] [9] [12] 38 78 dlyd-start [6] [9] [12] scsi id (0) [7] [9] [12] 39 79 scsi id (1) [7] [9] [12] scsi id (2) [7] [9] [12] 40 80 scsi id (3) [7] [9] [12]
cheetah 15k.5 scsi product manual, rev. j 67 table 20: lc 80-pin single-ended (l vd) i/o connector pin assignments [11] note. a minus sign preceding a signal name in dicates that signal is active low. notes [ ] : see page following this table. signal name [1] connector contact number [3] signal number [3] contact name [1] 12 v charge 1 41 12 v gnd 12 v 2 42 12 v gnd 12 v 3 43 12 v gnd 12 v 4 44 mated 1 [12] nc [10] 5 45 nc [10] nc [10] 6 46 diffsns [8] ?db11 7 47 +db11 ?db10 8 48 +db10 ?db9 9 49 +db9 ?db8 10 50 +db8 ?i/o 11 51 +i/o ?req 12 52 +req ?c/d 13 53 +c/d ?sel 14 54 +sel ?msg 15 55 +msg ?rst 16 56 +rst ?ack 17 57 +ack ?bsy 18 58 +bsy ?atn 19 59 +atn ?dbp 20 60 +dbp0 ?db7 21 61 +db7 ?db6 22 62 +db6 ?db5 23 63 +db5 ?db4 24 64 +db4 ?db3 25 65 +db3 ?db2 26 66 +db2 ?db1 27 67 +db1 ?db0 28 68 +db0 ?dbp1 29 69 +dp1 ?db15 30 70 +db15 ?db14 31 71 +db14 ?db13 32 72 +db13 ?db12 33 73 +db12 +5 v 34 74 mated 2 +5 v 35 75 5 v gnd +5 v charge 36 76 5 v gnd nc [10] 37 77 active led out [4] [9] rmt_start [5] [9] [12] 38 78 dlyd_start [6] [9] [12] scsi id (0) [7] [9] [12] 39 79 scsi id (1) [7] [9] [12] scsi id (2) [7] [9] [12] 40 80 scsi id (3) [7] [9] [12]
68 cheetah 15k.5 scsi product manual, rev. j notes [ ] for tables 17 through 20 . [1] see section 10.6.4.1 for detailed electrical char acteristics of these signals. [2] the conductor number refers to the conductor posi tion when using 0.025-inch (0.635 mm) centerline flat ribbon cable. other cables types may be used to implement equivalent contact assignments. [3] connector contacts are on 0.050 inch (1.27 mm) centers. [4] front panel led signal; indicates drive activity for host front panel hard drive activity indicator. [5] asserted by host to enable motor start option (enables starting motor via scsi bus command). [6] asserted by host to enable delayed motor start option (motor starts at power on or after a delay of 12 sec - onds times drive id). this and [3] above are mutually exclusive options. [7] binary code on a3, a2, a1 and a0 asserted by host to set up scsi bus id in drive. [8] g nd p r ovid es a m ean s fo r d i f f e r en ti al de vice s to dete c t the pr esence of a sin g le e n d ed device o n the bus. drive will not operate i/o bus at ultra2 or fast er scsi data rates if this is grounded. [9] signals [4] through [7] are used in place of insta lling jumpers and cables on option select connector j6. see section 8.1.1 notes. [10] ?nc? means no connection. [11] 8 bit devices which are connected to the 16 data bi t lvd i/o shall leave the following signals open: ?db8, ?db9, ?db10, ?db11, ?db12, ?d b13, ?db14, ?db15, and ?dbp1. 8 bit devices which are connected to the 16 data bit single-ended (se) i/o shall have the following signals open: db8, ?db9, ?db10, ?db11, ?db12, ?db13, ?db14, ?db15, and ?dbp1. all other signals should be connected as shown. [12] pins 38, 39, 40, 44, 78, 79, and 80 are option select pins and are tied high by the drive circuitry. the pre - fer r e d electrica l con nection a t the ba ckp l ane is eith e r ope n or g r o und ed ( ope n for the ?1 ? setting, gr oun de d for th e ?0? settin g) . alter natively , th ese pin s ma y b e dr ive n by a 3.3v log i c de vice , pu lled u p to 3.3v through a pull-up resistor (recommended size of 10k ohm), or grounded through some other means. 10.7 electrical description che e t a h 15k.5 scsi d r ives ar e mu lti m od e de vices. tha t is, th eir i/o circuit s can o per ate a s e i th er sin g le- e nde d or lo w volt a ge d i f f er en tia l d r iver s/r e ceiv er s ( s elect a ble using th e i/o ? d iff s ens? lin e) . see ansi standard t10/1320d for de tailed electrical specifications. 10.7.1 multimode?se and lvd alternatives wh en th e int e r fa c e ?di f f s n s ? lin e is b e t w ee n -0 .3 5 v an d +0 .5 v , th e d r ive inte r fa c e circ uit s op er at e sing le - e nde d an d up to a nd in clu d in g 20 m tr ansfer s /s (fa s t- 20 o r ultr a scsi) . wh en ? d iffsns? is be twee n +0.7 v and +1.9 v , th e dr ive in te rface circu i t s op er ate lo w vo lt ag e dif f e r e n tial an d up to an d includ ing 16 0 m tr an sfe r s / s or le ss (f as t- 16 0 or ult ra 32 0 scsi ). th is mu ltim ode de sign doe s no t allo w dyna mically cha ngi n g tr ansmission mo des. drive s must op er ate only i n th e mo d e fo r w h ic h th e inst a lla tio n an d int e r f a ce ca bli ng is d e sign ed. multimo de i/o cir c u i t s u s e d by the se d r ives d o not o p e r a t e at high volt a ge dif f er ential levels a n d sho u ld ne ve r be expo se d to hig h vo lt ag e d i f f er en tia l e n viro nme n t s un less th e co mmon mo de vo lt ag es in th e e n viro nme n t ar e con t rolle d to safe le ve ls fo r sin g le- e nde d an d low vo lt age d i f f e r en tial devices (see ansi spi-4 spec ification t 10/13 65 d) . l c a n d l w mo del d r ive s d o no t have o n b oar d ter m in ator s. t e r m ina t ion of the i/o lines mu st b e pr ovide d for by the host equ ipme nt d e sign er s or end u s ers. l v d ou tput cha r acteristics each dif f er entia l sign al d r iven b y l v d inter f a c e d r iver s shall ha ve the follo win g outpu t char acter i stics whe n me asur ed a t the d i sc dr ive con n e c tor : s t ea dy st ate l o w le ve l outpu t d i f f er en tia l vo lt age = 0.32 v = < |v s | = < 0.8 v ( s igna l n e g a tion/log i c 0 ) s t ea dy st ate high level output differential voltage = 0.32 v = < |v s | = < 0.8 v (signal assertion/logic 1)
cheetah 15k.5 scsi product manual, rev. j 69 lvd input characteristics ea ch dif f e r e n t i al s i gn al re ce ive d b y l v d in te rf ac e r e ceiv e r circuit s shall ha ve th e followin g inpu t cha r a c ter i stics whe n mea s u r e d at th e disc d r ive conn ector: steady state low level input differential voltage = 0.030 v = < v in = < 3.6 v (signal negation/logic 0) steady state high level input differential voltage = ?3.6 v = < v in = < ?0.030 v (signal assertion/logic 1) differential voltage = + 0.030 v minimum with common-mode voltage range 0.845 v = < v cm = < 1.685 v. (t10/1302d revision 20b, section a.3.1). figure 18. typical se-lvd alternat ive transmitter receiver circuits 10.7.1.1 general cable characteristics t o minimize discontin uities an d sig nal refle c tion s, ca bles o f dif f e r e n t imp eda nces sho u ld no t be used in the sam e bu s. imple m en t a tion s ma y r e q u ir e tra de- of fs in sh ieldin g e f fective n e s s, ca ble le ng th , the num ber of lo ads, tran sfe r r a tes, and cost to achieve sa tisfactory system op era t ion. if sh ielde d a nd u n shie lded cable s ar e mixe d within the same scsi bu s, th e e f fect o f imp eda nce mismatch m u st be car e fully con s ider ed . pro per impedance matching is especially important in order to ma intain adequate margin at fast scsi transfer rates. 10.7.1.2 single-ended drivers/receivers th e ma ximum to t a l cabl e len g th a llo wed with d r ives u s in g sing le- end ed i/o d r iver an d r e ceiver ci rcuit s d epe nds on se ve ra l factors. t a b l e 2 1 list s the ma xi mum leng ths allo wed fo r dif f e r e n t con f ig ur ations o f dr ive u s a ge. t hese value s ar e fr om th e spi d o cume nt s. all de vice i/o lin es mu st h a ve equ al to or less tha n 2 5 p f capacitance to ground, measured at the beginning of the stub. a stub length of no more than 0.1 meter (0.33 ft) is allowed off the mainline interconnection with any connected equipment. the stub length is measured from the tran sceiver to the connection to the mainline scsi bus. table 21: cable characterist ics for single-ended circuits i/o transfer rate maximu m numbe r of devices on the bus maximu m le ngth between scsi s.e. terminators transmission line impedance req/ack other signals < 10m transfers/s (fast 10) 16 (wide scsi bus) 3 meters (9.8 ft) 90 + 6 ohms 90 + 10 ohms < 20m transfers/s (fast 20) 4 (wide scsi bus) 3 meters (9.8 ft) 90 + 6 ohms 90 + 10 ohms < 20m transfers/s (fast 20) 8 (wide scsi bus) 1.5 meters (4.9 ft) 90 + 6 ohms 90 + 10 ohms vcca vccb single ended circuitry single ended receiver single ended negation driver single ended assertion driver single ended ground driver single ended: lvd: lvd signal drivers lvd signal drivers lvd receiver ground gnd +signal ?signal ?signal
70 cheetah 15k.5 scsi product manual, rev. j sin g le- e n ded i/o cable p i n assignm ent s for l w d r ives ar e sh own in t a b l e 18. single-ended i/o pin assignments for lc models are show n in table 19. the lc model does not require an i/o cable. it is designed to connect directly to a back panel connector. 10.7.1.3 cables for low voltage differential drivers/receivers the spi-3 and spi-4 specification for differential impedance for lvd cables is 122.5 + 12 .5 o h ms . the maximum s c si bus lengt h bet w een the t e rminators f o r a sc si l v d point -to-point syst em (one initiator a nd on e t a r g e t ) is 25 m e ter s (8 2 feet) . the maximum scsi bus length between the terminators f o r a scsi l vd mu lt idrop syst em (up to 16 t o t a l sc si de vic e s) is 12 m e te rs (3 9 .37 f e e t) . h o w e ve r , im ple m en t a tio n of this 12 -me te r tot a l le ngth is dep end en t on th e con f ig ur ation of th e syste m an d the ch oice o f ca ble. se e t a b l es 22 an d 2 3 fo r e x am p l es of r e com m e nd ed scsi l v d cab l e type s a nd len g ths. it should be noted fr om th e da t a in t a bles 22 an d 23 th at shield ed r o u nd twiste d- p a ir cab l es ca n b e used to imp l eme n t a 12 -me te r system , while t w ist-n - flat cable s ca n not be u s e d to imple m en t a 1 2 - m eter system du e to h i ghe r levels o f attenu ation an d cr osst alk. in add itio n, twis t-n - f l at ca b l es wit h sh or ter sections of tw is t allow g r e a ter cro s st a l k an d their leng th s mu st be r e d u ced a s shown in t a b l e 23 . t a ble 22 : shielde d round t w ist e d- p a ir ca ble s ?in t o a multi- drive ba ck pla n e cable d escr ip tio n diff erential im ped a n c e , n o mi nal single- end e d i m pe dan c e , no min a l single- en ded ca p a c i t a n c e, max i mum ti m e de la y , no mina l co nd uc tor dc r e sist an ce, no min a l maximu m shielde d ro un d tw iste d-p a ir c a bl e l e ng th for u160/u320 30 a w g solid 130 oh ms 9 0 o h ms 17 pf /f t 1 .3 6 ns/f t 0 .1 13 oh ms/f t 1 2 me te rs minu s the scsi trac e l ength of th e backpla ne 28 a w g stran ded 123 oh ms 8 0 o h ms 19 pf /f t 1 .5 4 ns/f t 0 .0 67 ohms/f t 1 2 me te rs minu s the scsi trac e l ength of th e backpla ne 28 a w g stran ded 132 oh ms 8 5 o h ms 20 pf /f t 1 .5 0 ns/f t 0 .0 65 ohms/f t 1 2 me te rs minu s the scsi trac e l ength of th e backpla ne t a ble 23 : t w ist - n- f l a t ca ble s ?in t o a multi- drive ba ck pla n e ca ble de scrip tio n di fferen t ial i m p e da nc e , n o mi na l si ng le -e nde d i m pe dan ce, no mi nal single- en ded ca p ac i t an c e, ma ximum ti m e de la y , no mina l co nd ucto r dc r esist an ce, no mi na l maximum t w ist-n-flat cab le len g th u 320 u160 tpe, 22.25? twist, 1.75? flat, (24? flat to f l at ), 30 a w g so lid tinn ed copp er 13 1 ohms 9 3 o h ms 15.3 pf /f t 1 .4 5 ns/f t 0 .105 o h ms/f t 3. 05 me te rs (10.0 f t ) 6.1 meters (20.0 f t ) t pe, 8.1? twi st, 1.75? flat, (9 .85 ? fla t to f l at ), 30 a w g so lid tinn ed copp er 13 1 ohms 9 3 o h ms 15.3 pf /f t 1 .4 5 ns/f t 0 .105 o h ms/f t 2. 45 me te rs (8.33 f t ) 4.9 meters (16.66 f t ) t pe, 4. 25? twist, 1. 75? flat, (6? f l at to flat ), 30 a w g solid tinn ed copp er 13 1 ohms 9 3 o h ms 15.3 pf /f t 1 .4 5 ns/f t 0 .105 o h ms/f t 1. 52 me te rs (5.0 f t ) 3.04 meters (10.0 f t )
cheetah 15k.5 scsi product manual, rev. j 71 10.8 terminator requirements caution: these drives do not have onboard internal terminat ors. the user, systems integrator or host equip - me nt man u facture r mu st pr ovide a te rm inator ar ra nge men t e x ter n a l to th e dr ive wh en ter m ina t ion is r equ ire d . fo r l w dr ives, te rmin a tor mo dule s ca n b e p u r c h a sed that p l ug between the scsi i/o cab l e a n d the dr ive i/o con n e c tor o r on th e end of a sho r t i/o ca ble stu b e x ten d in g p a st the last cable connector. lc drives are designed to be plugged into a backpanel connector without cabling. 10.9 terminator power lw drives you can configure terminator power from the drive to th e scsi bus or have the host adaptor or other device supply terminator power to the external terminator. see section 9.1 for illustration s that show how to place jumpers for this configuration. lc drives these drives cannot furnish terminat or power because no conductors in the 80-pin i/o connector are devoted to terminator power.
72 cheetah 15k.5 scsi product manual, rev. j 10.10 disc drive scsi timing table 24: disc drive scsi timing these values are not current cheetah 15k.5 scsi values, but are listed for information only. description waveform symbol [1] waveform table [1] typical timing target select time (no arbitration) t00 n/a <1 s target select time (with arbitration) t01 4.5-1,2 1.93 s target select to command t02 4.5-1 3.77 s target select to msg out t03 4.5-2 1.57 s identify msg to command t04 4.5-3 3.36 s command to status t05 4.5-5 command depen - dent command to data (para. in) t06 4.5-9 command depen - dent command to data (para. out) t07 4.5-10 command depen - dent command to data (write to data buffer) t08 4.5-10 command depen - dent command to disconnect msg t09 4.5-6 command depen - dent disconnect msg to bus free t10 4.5-6,14 0.52 s disconnect to arbitration (for reselect) this measures disconnected cmd over - head t11 4.5-6 command depen - dent target win arbitration (for reselect) t12 4.5-7 3.00 s arbitration to reselect t13 4.5-7 1.60 s reselect to identify msg in t14 4.5-7 1.39 s reselect identify msg to status t15 4.5-8 command depen - dent reselect identify ms g to data (media) t16 4.5-11 command depen - dent data to status t17 4.5-15 command depen - dent status to command complete msg t18 4.5-5,8,15 0.98 s command complete msg to bus free t19 4.5-5,8,15 0.51 s data to save data pointer msg t20 4.5-14 4.00 s save data pointer msg to disconnect msg t21 4.5-14 0.79 s command byte transfer t22 4.5-4 0.04 s next command byte access: 4.5-4 next cdb byte access (byte 2 of 6) t23.6.2 4.5-4 0.58 s next cdb byte access (byte 3 of 6) t23.6.3 4.5-4 0.12 s next cdb byte access (byte 4 of 6) t23.6.4 4.5-4 0.12 s next cdb byte access (byte 5 of 6) t23.6.5 4.5-4 0.12 s next cdb byte access (byte 6 of 6) t23.6.6 4.5-4 0.12 s
cheetah 15k.5 scsi product manual, rev. j 73 notes. [1] see the timing examples section of the parallel scsi interface manual . [2] maximum scsi asynchron ous interface transfer rate is given in section 5.2.3 of this manual. [3] synchronous transfer period is determined by negotiations between an initiator and a drive. the drive is capable of setting periods as given in section 10.5 . see also the synchronous data transfer section and the extended messages section of the parallel scsi interface manual for a description of synchronous data transfer operation. next cdb byte access (byte 2 of 10) t23.10.2 4.5-4 0.59 s next cdb byte access (byte 3 of 10) t23.10.3 4.5-4 0.11 s 1 s next cdb byte access (byte 4 of 10) t23.10.4 4.5-4 0.12 s 1 s next cdb byte access (byte 5 of 10) t23.10.5 4.5-4 0.11 s 1 s next cdb byte access (byte 6 of 10) t23.10.6 4.5-4 0.11 s 1 s next cdb byte access (byte 7 of 10) t23.10.7 4.5-4 0.13 s 1 s next cdb byte access (byte 8 of 10) t23.10.8 4.5-4 0.12 s 1 s next cdb byte access (byte 9 of 10) t23.10.9 4.5-4 0.12 s 1 s next cdb byte access (byte 10 of 10) t23.10.10 4.5-4 0.12 s 1 s data in byte transfer (parameter) t24 4.5-12 0.04 s data out byte transfer (parameter) t25 4.5-13 0.04 s next data in byte access (parameter) t26 4.5-12 0.12 s next data out byte access (parameter) t27 4.5-13 0.12 s data in byte transfer (media) [2] t28 4.5-12 0.04 s data out byte transfer (media) [2] t29 4.5-13 0.04 s next data in byte access (media [2] t30 4.5-12 0.12 s next data out byte access (media [2] t31 4.5-13 0.12 s msg in byte transfer t32 4.5-5,7,8,14,15 0.04 s msg out byte transfer t33 4.5-2 0.04 s status byte transfer t34 4.5-5,8,15 0.04 s synchronous data transfer characteristics: request signal transfer period [3] ? ? various (800 ns max) t a ble 24 : disc driv e scsi t i min g ( c ont in ued) t h e s e va lu es ar e no t cu rr en t c h e e t a h 1 5 k. 5 scsi va lue s , bu t ar e liste d fo r in fo rm a tio n on ly . de scrip tio n w ave form sy mbo l [1] w a vefo r m t a b l e [1 ] t y p ical timin g
74 cheetah 15k.5 scsi product manual, rev. j 10.11 drive activity led t h e fo llo win g t a b l e pr ov ide s d r iv e ac tivity l e d s t at us. t a b l e 2 5 : driv e ac ti vi ty l e d st a t u s s p indle st a t us command s t at us led st at us s p in nin g u p with dc powe r ap plie d n /a on u n til spin up is co mplete s pun d o wn s t a r t uni t on w h ile p r ocessing the command powe red dow n by re mo va l of dc po wer n/a o f f due to abse n ce of p o wer s pun u p s t op unit on w h ile p r ocessing the command s pun d o wn no comman d a c ti vi ty o f f s pun d o wn w r ite/read buf f er on w h ile p r ocessing the command s pun d o wn scsi bu s re se t o n w h ile p r ocessing the reset s pun d o wn t e st unit read y o n w h ile p r ocessing the command s pun u p no comman d a c ti vi ty o f f s pun u p w r ite/read on w h ile p r ocessing the command s pun u p scsi bu s re se t o n w h ile p r ocessing the reset s pun u p t e st unit read y o n w h ile p r ocessing the command s pun u p f o rmat wi th imme diate op ti on on on w h ile the comman d i s i n itial l y p r o c essed s pun u p f o rmat wi th out immedia t e l ed togg les on/of f o n each cylin der bou ndary s pun u p w r ite sa me c omma nd in pro g- ress togg les on/of f
cheetah 15k.5 scsi product manual, rev. j 75 index symbols +5 and +12 volt supplies 23 numerics 68-conductor connector 60 68-pin connector 61 80 conductor connector 60 80 conductor interface 60 80-pin connector option 59 80-pin i/o connector 66 , 67 a ac power 22 access time 11 accessories 9 acoustics 33 activity indicator 68 activity led 74 actuator 43 actuator assembly 7 afr 14 air cleanliness 32 air flow 43 suggested 43 altitude 29 altitude and atmospheric pressure 29 ambient 29 annualized failure rate 14 annualized failure rates (afr) 15 ansi scsi documents 5 arbitration priority 61 asynchronous interface transfer rate 73 audible noise 3 australia/new zealand standard 4 automatic retry 14 automatic shipping lock 7 average idle current 22 , 23 average latency 8 average rotational latency 10 , 11 b background media scan 37 background processing 8 backward compatibility 6 bits/inch 10 bms 37 buffer 12 space 12 bulkhead connector 58 bus device reset message 51 bytes per sector 49 c cable 57 cache 12 cache buffer 8 cache mode 12 cache operation 12 cache segments 13 caching write data 13 canadian department of communications 3 capacities 9 capacity, drive, programmable 9 ce marking 4 changeable bit 51 changeable value 51 check condition 51 circuits 69 class b limit 3 command 12 , 46 command descriptor block (cdb) 11 command queuing 8 condensation 29 conducted noise immunity 23 , 24 connect/disconnect 11 connector 57 connector contact 68 continuous vibration 32 controller 12 controller overhead 11 cooling 43 c-tick marking 4 current 24 current profile 24 , 25 current requirements 22 current value 51 d daisy-chain 24 , 58 , 61 dar 38 data block size modifing the 8 data correction 14 data transfer period 56 data transfer protocol 7 data transfer rate 11 dc cable and connector 57 dc current 58 dc power 12 , 14 , 42 , 57 dc power carrying conductor 60 dc power connector 56 dc power re quirements 22 dc power source 60 dedicated landing zone 6
76 cheetah 15k.5 scsi product manual, rev. j default 41 , 42 default mode parameter 39 default value 51 defect/error management 35 defects 35 deferred auto-reallocation 38 delayed motor start option 22 , 23 , 68 delayed start 42 differential i/o circuit 42 differentiating features 6 dimensions 33 disc rotational speed 10 drive 32 drive activity 68 drive activity led 74 drive capacity 10 programmable 9 drive default mode parameter 39 drive firmware 51 drive id 39 drive id select jumper connector 39 drive id/option select header 39 drive interface connector 60 drive internal defects and errors 35 drive mounting 33 , 44 constraints 14 drive orientation 43 drive power 39 drive primary defects list 35 drive scsi timing 72 drive select header 56 drive spindle 42 dynamic spindle brake 7 e ecc 14 ecc correction capability 7 electrical characteristics 56 , 68 electromagnetic compatibility 3 electromagnetic susceptibility 33 embedded servo 7 emc compliance 4 emi requirements 3 environmental control 32 environmental limits 29 environmental requirements 14 eprom 51 error 14 management 35 error management system 37 error rate 14 error recovery 35 errors 35 etf defect list 35 european union requirements 4 evpd bit 50 execution time 11 extended messages 46 f fcc rules and regulations 3 firmware 51 flat ribbon cable 68 flaw reallocation 11 format 49 format command 11 format time 11 formatting 39 front panel 33 front panel led 68 g gradient 29 ground return 23 grounding 44 h hard reset 51 hda 6 , 44 heat removal 43 host 42 , 49 , 58 , 61 host adapter 39 adapter/initiator 61 host backplane wiring 58 host equipment 44 , 59 , 60 dc power 60 host i/o signal 39 host system 39 host system malfunction 14 host/drive operational interface 14 hot plug 7 , 16 humidity 29 i i/o connector 58 identified defect 35 idle read after write 38 input characteristics 69 inquiry command 50 inquiry vital product data 50 installation 39 installation guide 9 installation instructions 39 instantaneous current peak 23 integrated ult ra1/ultra2 scsi controller 7 interface cable length 61 interface data 11 interface requirements 45
cheetah 15k.5 scsi product manual, rev. j 77 in te rface timing 14 internal data rate 10 iraw 38 j j1-auxiliary 39 jumper 9 , 39 , 41 , 42 , 68 jumper function description 42 jumper header 41 jumper plug type 39 l landing zone 7 led 74 logical block address 12 logical characteristics 56 logical segments 12 low voltage differential (lvd) drivers and receivers 7 lvd 68 lvd interface receiver circuits 69 m mating connector 57 , 59 , 60 mating flat cable connector 60 maximum current requirements 24 maximum operating current 23 maximum starting current 22 , 23 me jumper 42 mean time between failure (mtbf) 15 media 7 , 51 media pre-scan 37 message protocol 56 message protocol system 37 messages scsi interface 45 miscellaneous features 55 mode page 01 51 mode page 08h 12 mode parameter 51 mode select command 12 , 51 mode sense command 51 mode sense data 51 mode sense value 51 model number table 6 motor start command 12 motor start delay option 68 motor start option 12 , 23 , 68 mounting configuration 33 mounting configuration dimensions 33 , 34 mounting constraints 14 , 44 mounting point 44 mounting surface 44 mounting surface distortion 44 mounting surface stiffness 44 mtbf 14 , 15 multiconnector 80 conductor 60 multimode drivers and receivers 7 multi-segmented cache control 12 n noise 24 audible 3 non-operating 29 , 30 , 32 temperature 29 non-operating vibration 32 nonshielded 68 conductor connector 60 o office environment 32 operating 29 , 30 , 32 operating option 39 operating parameter 51 option jumper 39 option jumper location 39 option select header 56 option select jumper 39 options 9 orientation 30 , 43 out-of-plane deflection 44 out-of-plane distortion 44 output characteristics 68 p package size 30 package test specification 5 packaged 30 parity 42 parity checking 42 parity error 42 pcb 41 pcba 39 , 44 , 51 , 57 , 58 , 61 pcba circuit run 58 pd jumper 42 peak bits/inch 10 peak starting current 23 performance characteristics 10 performance degradation 30 peripheral i/o cable 24 physical characteristics 56 physical damage 32 physical interface 56 , 58 power 23 , 42 power connector 22 , 24 power control switch 12 power dissipation 26 power distribution 3 power sequencing 24
78 cheetah 15k.5 scsi product manual, rev. j power supply v o ltage 14 power-carrying conductor 60 power-on 39 , 68 power-on reset 51 power-up 24 , 42 prefetch 12 prefetch (read look-ahead) 12 prefetch mode 12 prefetch operation 12 prefetch segmented cache control 12 preventive maintenance 14 , 15 product data page 50 programmable drive capacity 9 r radio interference regulations 3 rcd bit 12 read error rate 14 read error rates 35 read retry count 35 read/write head 10 ready 51 receive diagnostic results 37 receiver circuits 69 recommended mounting 31 recoverable errors 14 reference documents 5 regulation 22 , 23 relative humidity 29 reliability 8 reliability and service 15 reliability specifications 14 remote switch 39 repair information 21 req/ack offset 56 request sense command 37 resonance 30 s s.m.a.r.t. 8 , 16 safe power transmission 60 safety 3 saved value 51 scsi commands 46 interface data transfer rate 11 messages 45 scsi bus cable 39 scsi bus condition 55 scsi bus id 68 scsi bus phase sequence 55 scsi command 35 scsi commands reference manual 5 scsi i/o connector 58 scsi id 39 , 42 scsi interface 12 , 58 scsi interface cable 59 scsi interface commands supported 46 scsi interface connector 56 scsi interface data 11 scsi interface product manual 3 , 5 , 6 scsi systems error 37 scsi systems error management 37 seagate support service 39 sector sizes 11 seek error 14 defined 15 self-monitoring analysis and reporting technology. see s.m.a.r.t. se-lvd alternative 69 shielding 3 shipping 21 shipping container 29 shock 30 and vibration 30 shock mount 44 signal ground 44 single unit shipping pack 9 single-ended (se) drivers and receivers 7 spindle startup 42 standard day 29 standards 3 start motor command 23 start unit command 42 start/stop time 12 status 37 stop spindle 12 stop time 12 straight-in connector 61 supply voltage 23 support services 1 synchronous data transfer 56 synchronous data transfer operation 73 synchronous data transfer period 56 synchronous transfer period 73 system chassis 44 t technical support services 1 temperature 18 , 29 , 43 non-operating 29 regulation 3 see also cooling temperature sensor 18 termination 24 terminator enable jumper te 61 terminator power 71 terminator requirements 39 , 71 thermal monitor 18
cheetah 15k.5 scsi product manual, rev. j 79 tp1 position 42 tracks/inch 10 tracks/surface, total 10 transfer period 56 transmitter receiver circuits 69 tunneling magnetoresistive heads 6 u ultra160 51 ultra160 mode 46 ultra160 scsi interface 6 ultra320 scsi controller 7 unformatted 8 unrecoverable errors 14 v vibration 30 , 32 vital product data 50 volatile memory 51 voltage 22 , 23 w warranty 8 , 20 wet bulb temperature 29 wide ultra160 scsi interface 6 wp jumper 42 write protect 42 write retry count 35 z zoned bit recording (zbr) 7

seagate technology llc 920 disc drive, scotts valley, california 95066-4544, usa publication number: 100384776, rev. j

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