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Seagate Cheetah ST336754SS-RF hard disk drive

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1. Table 5 Read and write retry count maximum recovery times Maximum recovery time per Maximum recovery time per Read retry count LBA cumulative msec Write retry count LBA cumulative msec 0 51 87 0 23 94 1 59 85 1 35 91 2 203 49 2 55 86 3 235 41 3 67 83 4 271 32 4 119 7 5 283 29 5 default 147 63 6 315 21 7 395 01 8 454 86 9 486 78 10 522 69 11 default 1 264 83 1 Setting these retry counts to a value below the default setting could result in degradation of the unrecov ered error rate which may exceed the value given in this product manual A setting of zero 0 will result in the drive not performing error recovery For example suppose the read write recovery page has the RC bit set to 0 read retry count set to 4 and the recovery time limit field Mode Sense page 01 bytes 10 and 11 set to FF FF hex maximum A four LBA Read command is allowed to take up to 271 32 msec recovery time for each of the four LBAs in the command lf the recovery time limit is set to 00 C8 hex 200 msec decimal a four LBA read command is allowed to take up to 200 msec for all error recovery within that command The use of the Recovery Time Limit field allows finer granularity on control of the time spent in error recovery The recovery time limit only starts counting when the drive is executing error recovery and it restarts on each command There fore each command s total recovery time is sub
2. 45 9 1 2 task management responses 45 9 2 Dual port Support ii 46 9 3 SCSI commands supported 47 9 3 1 Inquiry AAA ee e De lei Oe ER aes 51 9 3 2 Mode Sense data 51 9 4 Miscellaneous operating features and conditions 56 9 4 1 SAS physical interface 57 9 4 2 Physical characteristics 59 9 4 3 Connector reguirements 59 9 4 4 Electrical description 60 9 4 5 Pin descriptioNs L eee 60 9 4 6 SAS transmitters and receivers 61 9 4 7 POWE easter dye ete eel dn bt AeA eaten 61 9 5 Signal characteristics 61 9 5 1 Ready LED Out riot aan pn ea aan 61 9 5 2 Differential signals 62 10 0 Seagate Technology support services 73 ii Cheetah 15K 4 SAS Product Manual Rev B Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 F
3. P3 lt P3 lt Pa pa P3 lt Mode Sense 10 same pages as Mode Sense 1Ah 5Ah Prefetch 34h Read 08h Read Buffer modes 0 2 3 Ah and Bh supported 3Ch Read Capacity 25h Read Defect Data 10 37h Read Defect Data 12 B7h Read Extended 28h DPO bit supported FUA bit supported Read Long 3Eh Reassign Blocks 07h Receive Diagnostic Results lt lt lt lt lt pa lt zl lt 1Ch 48 Cheetah 15K 4 SAS Product Manual Rev B Table 8 Commands supported by Cheetah 15K 4 SAS family drives continued Command name Command code Supported Supported Diagnostics pages 00h Translate page 40h Y Y Release 17h Y Release 10 57h Y Reguest Sense 03h Y Actual Retry Count bytes Y Extended Sense Y Field Pointer bytes Y Reserve 16h Y 3rd Party Reserve Y Extent Reservation N Reserve 10 56h Y 3rd Party Reserve Y Extent Reservation N Rezero Unit O1h Y Search Data Egual 31h N Search Data High 30h N Search Data Low 32h N Seek OBh Y Seek Extended 2Bh Y Send Diagnostics 1Dh Y Supported Diagnostics pages 00h Y Translate page 40h Y Set Limits 33h N Start Unit Stop Unit spindle ceases rotating 1Bh Y Synchronize Cache 35h Y Test Unit Ready 00h Y Ver
4. XI IX 2X 29 21 Ea ZIK I I 2X 1 150 NS y y S 1 45 057 101 60 25 3 17 125 DRIVE 4 000 010 i CENTER 50 80 LINE 2 000 2X 100 13 i 2X 3 942 20 68 814 98 42 XK 3 875 qt r PE 4 z a 2 0 76 6 030 co o 77 3 Mi J D i 013 005 X TE CONNECTOR 36 37 TAB CENTERLINE 1 432 3504 38 L 005 Z gen 138 015 0 99 a zixiv Y 025 039 010 1101 016 Figure 16 Physical dimensions 38 Cheetah 15K 4 SAS Product Manual Rev B 7 0 Defect and error management The drive as delivered complies with this product manual The read error rates and specified storage capaci ties are not dependent upon use of defect management routines by the host initiator Defect and error management in the SCSI protocol involves the drive internal defect error management and SAS system error considerations errors in communications between the initiator and the drive Tools for use in designing a defect error management plan are briefly outlined in this section References to other sections are provided when necessary 7 1 Drive internal defects errors During the initial drive format operation at the factory media defects are identified tagged as being unusable and their locations recorded on the d
5. 00 00 00 00 40 00 00 00 00 00 00 00 3A A7 00 00 00 00 00 00 53 9 3 2 2 ST373454SS Mode Sense data E rj Page 0 0x00 00 00 OF 00 00 00 CHG Page 0 0x00 B7 40 0F 00 00 00 E rj Page 1 0x01 CO OB FF 00 00 00 05 00 FF FF CHG Page 1 0x01 FF FF 00 00 00 00 FF 00 FF FF S E HA Page 2 0x02 00 00 00 00 00 00 00 00 00 Al 00 00 00 00 CHG Page 2 0x02 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 E hg Page 3 0x03 2B 10 00 00 00 18 00 00 02 C2 02 00 00 01 00 AA 00 91 40 00 00 00 CHG Page 3 0x03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ta trj Page 4 0x04 00 C6 88 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3A AJ 00 00 CHG Page 4 0x04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Z ta trj Page 7 0x07 00 OB FF 00 00 00 00 00 FF FF CHG Page 7 0x07 OF FF 00 00 00 00 00 00 FF FF S ta tj Page 8 0x08 14 00 FF FF 00 00 FF FF FF FF 80 20 00 00 00 00 00 00 CHG Page 8 0x08 B5 00 00 00 FF FF FF FF 00 00 A0 FF 00 00 00 00 00 00 m trj Page 10 0x0A 02 00 00 00 00 00 00 00 04 7E CHG Page 10 0x0A 03 F1 00 00 00 00 00 00 00 00 ta trj Page 25 0x19 06 00 07 DO 00 00 CHG Page 25 0x19 10 00 FF FF FF FF Z ta trj Page 26 0x1A 00 02 00 00 00 05 00 00 00 04 CHG Page 26 0x1A 00 03 FF FF FF FF 00 00 00 00 ta trj Page 28 0x1C 10 00 00 00 00 00 00 00 00 01 CHG Page 28 0x1C 9D OF FF FF FF FF FF FF F
6. S SH S ss S 00 00 00 00 48 63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 oo 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 00 00 00 00 00 00 00 00 00 00 00 96 111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 32 Copyright 112 127 30 30 34 20 53 65 61 67 61 74 65 20 41 6C 6C 20 notice 128 143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20 xx PP R S Copyright year changes with actual year 02 SCSI 2 implemented with some SCSI 3 features default 03 SCSI 3 implemented 10 Inquiry data for an Inquiry command received on Port A 30 Inquiry data for an Inquiry command received on Port B Four ASCII digits representing the last four digits of the product firmware release number Eight ASCII digits representing the eight digits of the product serial number Bytes 18 through 26 reflect model of drive The table above shows the hex values for Model ST373454SS Refer to the values below for the values of bytes 18 through 27 of you particular model ST3146854SS 53 54 33 31 34 36 38 35 34 53 53 ST373454SS 53 54 33 37 33 34 35 34 53 53 20 ST336754SS 53 54 33 33 36 37 35 34 53 53 20 9 3 2 Mode Sense data The Mode Sense command pro
7. Cheetah 15K 4 SAS ST3146854SS ST373454SS ST336754SS Seagate Cheetah 15K 4 SAS ST3146854SS ST373454SS ST336754SS Seagate 2004 2005 Seagate Technology LLC All rights reserved Publication number 100350601 Rev B May 2005 Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC Cheetah SeaTools SeaFONE SeaBOARD SeaTDD and the Wave logo are either regis tered trademarks or trademarks of Seagate Technology LLC Other product names are regis tered trademarks or trademarks of their owners Seagate reserves the right to change without notice product offerings or specifications No part of this publication may be reproduced in any form without written permission of Seagate Technology LLC Revision status summary sheet Revision Date Sheets Affected Rev A 11 22 04 All Rev B 05 04 05 Pages 11 37 58 and 59 1 0 2 0 3 0 4 0 5 0 6 0 Contents SCOPE sti aa in Ka da inde Dea Ian Dan DANA a KA bob Dab RAN en Dan nasi se 1 Standards compliance and reference documents 3 2 1 Standal dsi ste A al er o ia Rada ika ki urea 3 2 1 1 Electromagnetic compatibility 3 2 2 GOMPpPlANGe essa ae ee o aces ceva stacey ay era A a Satan a aa 4 2 2 1 Electromagnetic compliance 4 2 3 Reference documents Woo 5 General description aa iu zane a a es eae RE BN 7 3
8. in V 0 XI X 1 X1 1 1 X2 Normalized time in U Figure 23 Receive eye mask Verifying compliance with the limits represented by the receive eye mask should be done with reverse channel traffic present in order that the effects of crosstalk are taken into account 9 5 2 1 3 Jitter tolerance masks Figure 24 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in table 18 X1op is half the value for total jitter intable 18 and X17 is half the value for total jitter in table 19 for jitter frequencies above bit rate 1 667 Absolute amplitude tin V additional sinusoidal jitter 2 2 Zle Zi TOL ov Outline of eye mask before adding ZhroL sinusoidal jitter Zio zo Outline of eye mask after adding sinusoidal jitter 0 Me Ri 1 1X9 XtroL 1 XtroL Normalized time in UI Figure 24 Reveive tolerance eye mask Cheetah 15K 4 SAS Product Manual Rev B 63 The leading and trailing edge slopes of figure 23 shall be preserved As a result the amplitude value of Z1 is less than that given in table 17 and Ziro and Z19p shall be defined from those slopes by the following equa tion h 1 m X2op 0 5 xadditional sinusoidal jitter X1 op Z1 TOL Z1 op X2 op X1 F where Z1roL is the value for Z1 to be used for the tolerance masks and Zlop Xlop and X2op are the values in table 17 for Z1 X1 and X2 The X1 points in the receive tolerance masks are great
9. 00 40 OB FF 00 00 20 00 C6 00 OB FF 00 00 00 Fl 00 00 02 03 00 OF 00 00 oc oc 00 00 OF OF FF 00 00 00 00 00 88 00 FF 00 FF 00 00 00 07 FF 00 FF 00 00 00 00 00 00 00 00 00 08 00 00 00 FF 00 00 00 DO FF 00 FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF 00 00 00 FF 00 FF 00 00 00 00 00 00 00 30 00 00 00 00 00 00 FF 00 00 00 FF 05 FF 00 05 FF 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 FF FF 00 FF 02 00 00 00 FF FF FF 00 08 00 00 00 00 FF FF Al FF C2 00 00 00 FF EXE FF 00 4D 00 04 00 01 FE 00 00 00 00 00 FF FE 00 00 00 00 18 FF FE 01 03 00 00 00 FF FE 00 00 00 00 18 FF Cheetah 15K 4 SAS Product Manual Rev B FE 00 FF 00 00 50 00 FE OF FF 00 00 00 00 FE 00 00 00 00 00 00 FE 00 00 00 00 00 00 00 00 02 00 00 00 80 A0 00 00 00 00 00 00 20 FF 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 91 00
10. An N in the support column indicates the feature or condition is not supported Table 10 Miscellaneous features Supported Feature or condition N Automatic contingent allegiance Asynchronous event notification Synchronized locked spindle operation Segmented caching Zero latency read Queue tagging up to 64 queue tags supported Deferred error handling Parameter rounding controlled by Round bit in Mode Select page 0 Reporting actual retry count in Extended Sense bytes 15 16 and 17 Adaptive caching lt z lt lt lt lt z lt z z SMP 1 in Mode Select command needed to save RPL and rotational offset bytes Table 11 Miscellaneous status Supported Status Y Good Check condition Condition met good Busy Intermediate good Intermediate condition met good Reservation conflict Task set full ACA active zl z lt lt lt lt lt lt lt ACA active faulted initiator 56 Cheetah 15K 4 SAS Product Manual Rev B 9 4 1 SAS physical interface Figure 19 shows the location of the SAS device connector J1 Figures 20 and 21 provide the dimensions of the SAS device Details of the physical electrical and logical characteristics are provided within this section The operational aspects of Seagate s SAS drives are provided in the SAS Interface Manual lt S LE h E E SAS Inte
11. Buffer Over run Under run page 01h Cache Statistics page 37h Factory Log page 3Eh Last n Deferred Errors or Asynchronous Events page OBh z z lt lt 2 lt lt z zi 2 P3 P3 PI P3 lt lt P3 lt 2 lt Pa pda lt Z zi zi z Last n Error Events page 07h Cheetah 15K 4 SAS Product Manual Rev B Table 8 Commands supported by Cheetah 15K 4 SAS family drives continued Command name Command code Supported Non medium Error page 06h Pages Supported list 00h Read Error Counter page 03h Read Reverse Error Counter page 04h Self test Results page 10h Start stop Cycle Counter page 0Eh Temperature page ODh Verify Error Counter page 05h Write error counter page 02h Mode Select same pages as Mode Sense 1Ah 15h N Mode Select 10 same pages as Mode Sense 1Ah 55h Mode Sense 1Ah N Caching Parameters page 08h Control Mode page 0Ah Disconnect Reconnect 02h Error Recovery page 01h Format page 03h Information Exceptions Control page 1Ch Notch and Partition Page OCh Protocol Specific Port page 19h Power Condition page 1Ah Rigid Disc Drive Geometry page 04h Unit Attention page 00h Verify Error Recovery page 07h Xor Control page 10h Z lt lt lt PI lt z P3 P3 P3 P3 P3 lt lt
12. e Motor will not spin e 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 5 2 6 2 2 Invoking DST To invoke DST submit the Send Diagnostic command with the appropriate Function Code 001b for the short test or 010b for the extended test in bytes 1 bits 5 6 and 7 5 2 6 2 3 Short and extended tests DST has two testing options 1 short 2 extended These testing options are described in the following two subsections Each test consists of three segments an electrical test segment a servo test segment and a read verify scan segment Short test Function Code 001b The purpose of the short test is to provide a time limited test that tests as much of the drive as possible within 120 seconds The short test does not scan the entire media surface but does some fundamental tests and scans portions of the media A complete read verify scan is not performed and only factual failures will report a fault condition This option provides a quick confidence test of the drive Extended test Function Code 010b The objective of the extended test option is to empirically test critical drive components For example the seek tests and on track operations test the positioning mechanism The read operation tests the read head element and the media surface The write el
13. head and disc assembly HDA You should confirm that adeguate heat removal is provided using the temper ature measurement guidelines described in Section 6 4 1 Forced air flow may be reguired to keep temperatures at or below the temperatures specified in Section 6 4 1 in which case the drive should be oriented or air flow directed so that the least amount of air flow resistance is created while providing air flow to the electronics and HDA Also the shortest possible path between the air inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources within the rack cabinet or drawer environment If forced air is determined to be necessary possible air flow patterns are shown in Figure 18 The air flow pat terns are created by one or more fans either forcing or drawing air as shown in the illustrations Conduction convection or other forced air flow patterns are acceptable as long as the temperature measurement guide lines of Section 6 4 1 are met Under unit Note Air flows in the direction shown back to front or in reverse direction front to back Above unit Ng A i ai Under unit gt Note Air flows in the direction shown or in reverse direction side to side Figure 18 Air flow 42 Cheetah 15K 4 SAS Product Manual Rev B 8 3 Drive mounting Mount the drive using the bottom or side mounting holes If you mount the drive using the bottom holes ensure th
14. 6 1 AC power reguirements None 6 2 DC power reguirements The voltage and current reguirements for a single drive are shown below Values indicated apply at the drive connector Table 2 ST3146854SS DC power reguirements ST3146854SS ST3146854SS 3 Gbit mode 1 5 Gbit mode Notes Amps Amps Amps Amps Voltage 5V 12V 2 5V 12V 2 Regulation 5 15 5 2 15 5 2 Avg idle current DCX 111171 1 02 0 77 1 08 0 77 Maximum starting current peak DC DC 30 3 1 21 1 82 1 23 1 82 peak AC AC 30 3 1 67 3 89 1 67 3 88 Delayed motor start max DC 36 1 4 1 03 0 04 1 02 0 04 Peak operating current Typical DCX 1 6 1 12 1 17 1 04 1 17 Maximum DC 30 1 1 15 1 19 1 12 1 20 Maximum peak DC 3s 1 70 2 86 1 70 2 90 Cheetah 15K 4 SAS Product Manual Rev B 25 Table 3 ST373454SS DC power reguirements ST373454SS ST373454SS 3 Gbit mode 1 5 Gbit mode Notes Amps Amps Amps Amps Voltage 45V 12V 2 45V 412V 2 Regulation 5 5 5 2 5 5 2 Avg idle current DCX 1 7 1 02 0 56 1 07 0 56 Maximum starting current peak DC DC 30 3 1 20 1 76 1 21 1 78 peak AC AC 30 3 1 62 3 79 1 56 3 87 Delayed motor start max DC 30 1 4 1 03 0 04 0 91 0 04 Peak operating current Typical DCX 1 6 1 12 0 95 1 00 0 94 Maximum DC 30 1 1 13 0 96 1 02 0 96 Maximum peak DC 3
15. Hz 1 2 GRMS 6 4 5 Air cleanliness The drive is designed to operate in a typical office environment with minimal environmental control 6 4 6 Corrosive environment Seagate electronic drive components pass accelerated corrosion testing eguivalent to 10 years exposure to light industrial environments containing sulfurous gases chlorine and nitric oxide classes G and H per ASTM B845 However this accelerated testing cannot duplicate every potential application environment Users should use caution exposing any electronic components to uncontrolled chemical pollutants and corro sive chemicals as electronic drive component reliability can be affected by the installation environment The sil ver copper nickel and gold films used in Seagate products 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 surface 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 eliminated The useful life of any electronic eguipment may be extended by replacing materials near circuitry with sulfide free alternatives Cheetah 15K 4 SAS Product Manual Rev B 37 6 4 7 Acoustics Sound power during idle mode shall be 3 6 bels typ
16. Operations Warranty Service Call center USA Canada Mexico and Latin America Brazil Jabil Industrial Do Brasil LTDA Data Recovery Services Call center USA Canada and Mexico Toll free 1 800 468 3472 Toll free 1 800 475 01435 Direct dial 1 405 324 4730 Direct dial 41 405 324 4700 Direct dial 455 11 4191 4761 Direct dial 1 905 474 2162 FAX 1 405 324 4704 FAX 1 405 324 3339 FAX E mail 1 956 664 4725 55 11 4191 5084 SeagateRMA br jabil com FAX 1 800 475 0158 1 905 474 2459 Hours of operation are 8 00 A M to 11 45 A M and 1 00 P M to 6 00 P M Monday through Friday Central time Hours of operation are 8 00 A M to 8 00 P M Monday through Friday Central time 3Hours of operation are 8 00 A M to 5 00 P M Monday through Friday Central time 4Authorized Service Center Hours of operation are 8 00 A M to 8 00 P M Monday through Friday and 9 00 A M to 5 00 P M Saturday Eastern time 74 Cheetah 15K 4 SAS Product Manual Rev B European support services For presales and technical support in Europe dial the Seagate Service Center toll free number for your spe cific location If your location is not listed here dial our presales and technical support call center at 1 405 324 4714 from 8 00 A M to 11 45 A M and 1 00 P M to 5 00 P M Central Europe time Monday through Friday The presales and technical support call center is located in Oklahoma C
17. accomplish this issue a Log Sense command to log page 0x3E This allows you to control when S M A R T interruptions occur Forcing S M A R T with the RTZ command resets the timer Performance impact S M A R T attribute data is saved to the disc so that the events that caused a predictive failure can be recre ated The drive measures and saves parameters once every two hours subject to an idle period on the drive interfaces The process of measuring off line attribute data and saving data to the disc is uninterruptable The maximum on line only processing delay is summarized below Maximum processing delay On line only delay Fully enabled delay DEXCPT 0 PERF 1 DEXCPT 0 PERF 0 S M A R T delay times 90 milliseconds 300 milliseconds Cheetah 15K 4 SAS Product Manual Rev B 19 Reporting control Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page 1Ch Subject to the reporting method the firmware will issue to the host an 01 5Dxx sense code The error code is preserved through bus resets and power cycles Determining rate S M A R T monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors increases to an unacceptable level To determine rate error events are logged and compared to the number of total operations for a given attribute The interval defines the number of operations over which to measure the rate The counter that keeps tr
18. anytime anywhere in the world reseller seagate com reseller seagate com supports Seagate resellers with product information program benefits and sales tools You may register for customized communications that are not available on the web These communications contain product launch EOL pricing promotions and other channel related information To learn more about the benefits or to register go to reseller seagate com any time from anywhere in the world Automated phone services SeaFONE 1 800 SEAGATE is the Seagate toll free number 1 800 732 4283 to access our automated directory assistance for Seagate Service Center support options International callers can reach this service by dialing 1 405 324 4770 Seagate Service Centers Presales Support Our Presales Support staff can help you determine which Seagate products are best suited for your specific application or computer system as well as drive availability and compatibility Technical Support If you need help installing your drive consult your system s documentation or contact the dealer s support ser vices department for assistance specific to your system Seagate technical support is also available to assist you online at support seagate com or through one of our call centers Have your system configuration informa tion and your drive s ST model number available SeaTDD 1 405 324 3655 is a telecommunications device for the deaf TDD You ca
19. average rounded off values Bytes per surface 18 351 18 351 18 351 Mbytes unformatted rounded off value Tracks per surface total 50 864 50 864 50 864 Tracks user accessible Tracks per inch 85 000 85 000 85 000 TPI Peak bits per inch 628 628 628 KBPI Internal data rate 685 1 142 685 1 142 685 1 142 Mbits sec variable with zone Disc rotation speed 15k 15k 15k rpm Avg rotational latency 2 0 2 0 2 0 msec 4 2 Seek performance characteristics See Section 9 4 1 SAS physical interface on page 57 and the SAS Interface Manual part number 100293071 for additional timing details 421 Access time Not Including controller overhead 2 msec Read Write Average Typical 3 5 4 0 Single track Typical 0 2 0 4 Full stroke Typical 7 4 7 9 1 Typical access times are measured under nominal conditions of temper ature voltage and horizontal orientation as measured on a representa tive sample of drives 2 Access to data access time latency time Cheetah 15K 4 SAS Product Manual Rev B 11 4 2 2 Format command execution time minutes ST3146854SS ST373454SS ST336754SS Maximum with verify 90 60 30 Maximum without verify 45 30 15 4 2 3 General performance characteristics Minimum sector interleave 1 to 1 Data buffer to from disc media one 512 byte logical block Minimum 685 Mbits sec Maximum 1 142 Mbits sec SAS Interface maximum instantaneous transfer rate 300 Mbytes sec per port dual port 600 Mbytes sec L
20. blocks that are already in the cache This data may be in multiple segments 2 When a requested logical block is reached that is not in any cache segment the drive fetches it and any remaining reguested logical block addresses from the disc and puts them in a segment of the cache The drive transfers the remaining reguested logical blocks from the cache to the host in accordance with the Mode Select Disconnect Reconnect parameters page 02h 3 If the prefetch feature is enabled refer to section 4 5 2 for operation from this point Case B A Read command reguests data and the first logical block is not in any segment of the cache 1 The drive fetches the reguested logical blocks from the disc and transfers them into a segment and then 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 4 5 2 for operation from this point Cheetah 15K 4 SAS Product Manual Rev B 13 During a prefetch the drive crosses a cylinder boundary to fetch data only if the Discontinuity DISC bit is set to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h Default is zero for bit 4 Each cache segment is actually a self contained circular buffer whose length is an integer number of logical blocks The wrap around capability of the individual segments greatly enhances the cache s overall perfor mance allowing a wide range of user selectable configu
21. for desktop and server applications Desktop and server applications reguire different drive caching operations for optimal performance This means it is difficult to provide a single configuration that meets both of these needs In a desktop environment you want to configure the cache to respond guickly to repetitive accesses of multiple small segments of data without taking the time to look ahead to the next contiguous segments of data In a server environment you want to configure the cache to provide large volumes of seguential data in a non repetitive manner In this case the ability of the cache to look ahead to the next contiguous segments of sequential data is a good thing The Performance Mode PM bit controls the way the drive switches the cache buffer into different modes of segmentation In server mode PM bit 0 the drive can dynamically change the number of cache buffer segments as needed to optimize the performance based on the command stream from the host In desktop mode PM bit lt 1 the number of segments is maintained at the value defined in Mode Page 8 Byte 13 atall times unless changed by using a Mode Select command For additional information about the PM bit refer to the Unit Attention Parameters page 00h of the Mode Sense command 1Ah in the SAS Interface Manual part number 100293071 Cheetah 15K 4 SAS Product Manual Rev B 15 Cheetah 15K 4 SAS Product Manual Rev B 5 0 Reliability speci
22. ie 0 05 x 45 5X 5 1 2 25 40 05 Y so 4 op A tt gt 1 0 40 0 05 X 45 3X 4 85 0 05 0 10B Mi CORING ALLOWED E N THIS AREA gt lt 4 40 0 15 SEE Detail 2 A RO 30 0 08 c A gt 2 95 0 08 LEAN A 3 90 0 15 SECTION A A SECTION CONTACT SURFACE FLUSH po TO DATUM A 0 03 _ gt TE 1 4 65 4 1 90 0 08 1 23 0 05 AR a i gt a Detail 2 i 0 08 0 05 2 40 Ai lt 0 10JA v SECTION B B D Figure 21 SAS connector dimensions 9 4 2 Physical characteristics This section defines physical interface connector 9 4 3 Connector reguirements Contact your preferred connector manufacturer for mating part information Part numbers for SAS connectors will be provided in a future revision of this publication when production parts are available from major connec tor manufacturers The SAS device connector is illustrated in Figures 20 and 21 Cheetah 15K 4 SAS Product Manual Rev B 59 9 4 4 Electrical description SAS drives use the device connector for e DC power SAS interface e Activity LED This connector is designed to either plug directly into a backpanel or accept cables 9 4 5 Pin descriptions This section provides a pin out of the SAS device and a description of the functions provided by the pins Table 12 SAS pin descript
23. this requires special facilities The drive does not contain user replaceable parts Opening the HDA for any reason voids your warranty Cheetah drives use a dedicated landing zone at the innermost radius of the media to eliminate the possibility of destroying or degrading data by landing in the data zone The heads automatically go to the landing zone when power is removed from the drive An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur ing shipping and handling The shipping lock disengages and the head load process begins when power is applied to the drive Cheetah drives decode track 0 location data from the servo data embedded on each surface to eliminate mechanical transducer adjustments and related reliability concerns The drives also use a high performance actuator assembly with a low inertia balanced patented straight arm design that provides excellent performance with minimal power dissipation Cheetah 15K 4 SAS Product Manual Rev B 7 3 1 Standard features Cheetah drives have the following standard features 1 5 3 Gbit Serial Attached SCSI SAS interface Integrated dual port SAS controller supporting the SCSI protocol Support for SAS expanders and fanout adapters Firmware downloadable using the SAS interface 64 deep task set queue Supports up to 32 initiators Jumperless configuration User selectable logical block size 512 to 528 bytes per logical bloc
24. time spent in error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode page The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry Count or Write Retry Count bytes in the Error Recovery mode page The drive firmware error recovery algorithms consists of 11 levels for read recoveries and five levels for write Each level may consist of multiple steps where a step is defined as a recovery function involving a single re read or re write attempt The maximum level used by the drive in LBA recovery is determined by the read and write retry counts Table 5 eguates the read and write retry count with the maximum possible recovery time for read and write recovery of individual LBAs The times given do not include time taken to perform reallocations Reallocations are performed when the ARRE bit for reads or AWRE bit for writes is one the RC bit is zero and the recov ery time limit for the command has not yet been met Time needed to perform reallocation is not counted against the recovery time limit Cheetah 15K 4 SAS Product Manual Rev B 39 When the RC bit is one reallocations are disabled even if the ARRE or AWRE bits are one The drive will still perform data recovery actions within the limits defined by the Read Retry Count Write Retry Count and Recovery Time Limit parameters However the drive does not report any unrecovered errors
25. with unigue default values also On standard OEM drives the saved values are taken from the default values list and stored into the saved values storage location on the media prior to shipping Current values Current values are volatile values being used by the drive to control its operation A Mode Select command can be used to change the values identified as changeable values Originally current values are installed from saved or default values after a power on reset hard reset or Bus Device Reset message Changeable values Changeable values form a bit mask stored in nonvolatile memory that dictates which of the current values and saved values can be changed by a Mode Select command A one 1 indicates the value can be changed A zero 0 indicates the value is not changeable For example in Table 9 3 2 1 refer to Mode page 81 in the row entitled CHG These are hex numbers representing the changeable values for Mode page 81 Note in columns 5 and 6 bytes 04 and 05 there is 00h which indicates that in bytes 04 and 05 none of the bits are changeable Note also that bytes 06 07 09 10 and 11 are not changeable because those fields are all zeros In byte 02 hex value FF equates to the binary pattern 11111111 If there is a zero in any bit position in the field it means that bit is not changeable Since all of the bits in byte 02 are ones all of these bits are changeable The changeable values list can only be changed by downl
26. within this document are specified with the drive mounted by any of the four methods shown in Figure 15 and in accordance with the restrictions of Section 8 3 Orientation of the side nearest the LED may be up or down 6 4 4 1 Shock a Operating normal The drive as installed for normal operation shall operate error free while subjected to intermittent shock not exceeding 15 Gs at a maximum duration of 11 msec half sinewave The drive as installed for normal operation shall operate error free while subjected to intermittent shock not exceeding 65 Gs at a maximum duration of 2 msec half sinewave Shock may be applied in the X Y or Z axis Operating abnormal Eguipment as installed for normal operation does not incur physical damage while 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 performance during the abnormal shock period Speci fied operational performance will continue when normal operating shock levels resume Shock may be applied in the X Y or Z axis Shock is not to be repeated more than two times per second Non operating The limits of non operating shock shall apply to all conditions of handling and transportation This includes both isolated drives and integrated drives The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum duration of 11 msec half sinewave s
27. 0 00 00 00 02 00 00 00 FF 00 00 00 DO FF 00 FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF 00 00 00 FF 00 FF 00 00 00 00 00 00 00 OC 00 00 00 00 00 00 FF 00 00 00 FF 05 FF 00 05 FF 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 FF FF 00 00 00 00 00 FF FF 00 FF 02 00 00 00 FF FF FF 00 02 00 00 00 00 FF FF Al FF C2 00 00 00 FF EXE FF 00 5B 00 04 00 01 FE 00 00 00 00 00 FF FE 00 00 00 00 18 FF FE 01 03 00 00 00 FF FE 00 00 00 00 18 FF Cheetah 15K 4 SAS Product Manual Rev B FE 00 FF 00 00 50 00 FE OF FF 00 00 00 00 FE 00 00 00 00 00 00 FE 00 00 00 00 00 00 00 00 02 00 00 00 80 A0 00 00 00 00 00 00 20 FF 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 F0 00 00 00 00 00 00 00 00 00 00 00 91 00 00 00 00 00 40 00 00 00 00 00 00 00 3A A7 00 00 00 00 00 00 55 9 4 Miscellaneous operating features and conditions Table 10 lists various features and conditions A Y in the support column indicates the feature or condition is supported
28. 1 Standard features bea ag he A nied bie Ae ae pad z 8 3 2 Media description rasei en nana an Bana BER BEN a ed Wee 8 3 3 PETTO MAN E S i rere oar owe A A aa DK a beaters 8 3 4 Reliability ii A na Ketan poo ije na Raba Anam Sena RO Mode Kaban Bk an bana 9 3 5 Formatted capacities a 9 3 6 Programmable drive capacity eee eae 9 3 7 Factory installed accessories 9 3 8 Factory installed options eee 10 3 9 User installed accessories 10 Performance characterisSticS ccocomcoccocmcococoyoocococococom coc 11 41 Internal drive characteristics 11 4 2 Seek performance characteristics 11 421 ACCESS timo i2 sit Lema r td eta 11 4 2 2 Format command execution time minutes 12 4 2 3 General performance characteristics 12 4 3 Start Stop IMG cai iaa iba a Gin Ei pa DAR e DENE as WER Bhi s 12 4 4 Prefetch multi segmented cache control 13 4 5 Gacha operation zb ni ae dd DE A A A o AN NI 13 4 5 1 Caching write data 14 4 5 2 Prefetch operation Le 14 4 5 3 Optimizing cache performance for desktop and server
29. 13438 and meets the Electromagnetic Compatibility EMC Framework requirements of the Taiwanese Bureau of Standards Metrology and Inspec tion BSMI 4 Cheetah 15K 4 SAS Product Manual Rev B 2 3 Reference documents Cheetah 15K 4 SAS Installation Guide Seagate part number 100350602 SAS Interface Manual Seagate part number 100293071 ANSI SAS Documents SFF 8323 SFF 8460 SFF 8470 SFF 8482 ANSI INCITS xxx ISO IEC 14776 xxx ISO IEC 14776 xxx ISO IEC 14776 xxx 3 5 Drive Form Factor with Serial Connector HSS Backplane Design Guidelines Multi Lane Copper Connector SAS Plug Connector Serial Attached SCSI SAS Standard T10 1562 D SCSI Architecure Model 3 SAM 3 Standard T10 1561 D SCSI Primary Commands 3 SPC 3 Standard T10 1416 D SCSI Block Commands 2 SBC 2 Standard T10 1417 D ANSI Small Computer System Interface SCSI Documents X3 270 1996 SCSI 3 Architecture Model Specification for Acoustic Test Reguirement and Procedures Seagate part number 30553 001 Package Test Specification Seagate P N 30190 001 under 100 Ib Package Test Specification Seagate P N 30191 001 over 100 Ib In case of conflict between this document and any referenced document this document takes precedence Cheetah 15K 4 SAS Product Manual Rev B Cheetah 15K 4 SAS Product Manual Rev B 3 0 General description Cheetah drives combine giant magnetoresistive GMR heads partial response maximum likelih
30. 1730 Thailand 001 800 11 0032165 Customer Service Operations Warranty Service Call center Toll free Direct dial FAX Asia Pacific 65 6485 3595 65 6485 4860 Australia 1800 12 9277 India 91 44 821 6164 91 44 827 2461 Hours of operation are 8 30 A M to 5 30 P M Monday through Friday Australian Western time Hours of operation are 9 00 A M to 6 00 P M Monday through Saturday 3Hours of operation are 9 30 A M to 6 30 P M Monday through Friday 4Authorized Service Center 76 Cheetah 15K 4 SAS Product Manual Rev B Publication feedback survey We are interested in your comments and suggestions regarding this publication Please take a few minutes to participate in our survey at the following URL http survey seagate com survey techpubs nsf Thank you for your time and comments Cheetah 15K 4 SAS Product Manual Rev B 77 78 Cheetah 15K 4 SAS Product Manual Rev B Index Numerics 12 volt pins 61 5 volt pins 61 A abort task set function 45 AC coupling 61 AC power reguirements 25 ACA active status 56 ACA active faulted initiator status 56 acoustics 38 active LED Out signal 61 actuator 9 assembly design 7 adaptive caching 56 AFR 9 18 air cleanliness 37 air flow 34 42 illustrated 42 air inlet 42 altitude 35 ambient 34 ambient temperature 34 42 Annualized Failure Rate 18 ANSI documents SCSI 5 Serial Attached SCSI 5 asynchronous event notificati
31. 6 Cheetah 15K 4 SAS Product Manual Rev B 6 4 4 2 Vibration a Operating normal The drive as installed for normal operation shall comply with the complete specified performance while subjected to continuous vibration not exceeding 5 500 Hz 0 5 G zero to peak Vibration may be applied in the X Y or Z axis Operating normal translational random flat profile 10 400 Hz 0 4 GRMS b Operating abnormal Eguipment as installed for normal operation shall not incur physical damage while subjected to periodic vibration not exceeding 15 minutes of duration at major resonant freguency 5 500 Hz 0 75 G X Y or Z axis Vibration occurring at these levels may degrade operational performance during the abnormal vibration period Specified operational performance will continue when normal operating vibration levels are resumed This assumes system recovery routines are available Operating abnormal translational random flat profile 10 400 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 drives 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 10 400
32. 600 1400 1200 1000 Amperes 0 800 0 600 0 400 7 7 7 T 7 7 7 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 1 Os per Second e 5Volt A 12 Volt A 4 Watts Tu o s s s Je Figure 12 ST336754SS 3 Gbit DC current and power vs input output operations per second ST336754SS in 1 5 Gbit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 10 63 watts 36 27 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vertical axis To calculate BTUs per hour multiply watts by 3 4123 ST336754SS DC CURRENT POWER vs THROUGHPUT 1 5 Gbit Random 8 Block Reads 1800 e 5Volt A 12 Volt A 1 600 4 Watts 1400 v o Q 1200 S o s 1000 Z 0 800 0 600 0 400 4 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 Os per Second Figure 13 ST336754SS 1 5 Gbit DC current and power vs input output operations per second Cheetah 15K 4 SAS Product Manual Rev B 33 6 4 Environmental limits Temperature and humidity values experienced by the drive must be such that condensation does not occur on any drive part Altitude and atmospheric p
33. B R radio interference regulations 3 RCD bit 13 read error rates 17 read write data heads 11 receivers 61 recommended mounting 36 Recoverable Errors 17 recovered media data 17 reference documents 5 relative humidity 35 reliability 9 specifications 17 reliability and service 18 repair and return information 23 reporting actual retry count 56 reservation conflict status 56 resonance 35 return information 23 rotation speed 11 S safety 3 SAS interface 60 physical interface 57 task management functions 45 SAS documents 5 SAS Interface Manual 3 5 SCSI interface commands supported 47 seek error defined 18 rate 17 seek performance characteristics 11 seek time average typical 11 full stroke typical 11 single track typical 11 segmented caching 56 Self Monitoring Analysis and Reporting Technology 9 19 Serial Attached SCSI SAS Interface Manual 1 shielding 3 shipping 23 shipping container 34 shock 35 and vibration 35 shock mount 43 signal characteristics 61 single unit shipping pack kit 10 SMART 9 19 81 SMP 1 in Mode Select command 56 spindle brake 8 standards 3 start stoptime 12 Sulfur 37 support services 73 surface stiffness allowable for non flat surface 43 switches 41 synchronized spindle operation 56 system chassis 43 T task management functions 45 Abort task set 45 Clear ACA 45 Clear task set 45 terminate task 45 task management response codes 45 Function complete 00 45 F
34. F FE S E rj Page 53 0x35 01 00 00 00 01 00 00 0F 00 00 CHG Page 53 0x35 03 00 00 00 03 00 FF FF 00 00 E rj Page 57 0x39 00 0 00 00 00 00 00 00 00 00 CHG Page 57 0x39 00 OC 00 00 00 00 00 00 00 00 E hg Page 58 0x3A 00 00 00 18 00 18 50 00 00 00 CHG Page 58 0x3A 00 00 FF FF FF FF 00 00 00 00 54 Cheetah 15K 4 SAS Product Manual Rev B 9 3 2 3 ta trj Page CHG Page ta Hj Page CHG Page ta trj Page CHG Page Z E tj Page CHG Page 2 ta trj Page CHG Page ta Hj Page CHG Page ke ta trj Page CHG Page Z ta H Page CHG Page se ta Hj Page CHG Page ta Hj Page CHG Page ke ta trj Page CHG Page ta trj Page CHG Page Z E La Page CHG Page ta trj Page CHG Page ST336754SS Mode Sense data 0 0x00 0 0x00 1 0x01 1 0x01 2 0x02 2 0x02 3 0x03 3 0x03 4 0x04 4 0x04 1 0x07 7 0x07 8 0x08 8 0x08 10 0x0A 10 0x0A 00 B7 co FF 00 00 L5 00 00 00 00 OF 14 02 03 06 10 00 00 10 9D 01 03 00 00 00 00 00 40 OB FF 00 00 88 00 C6 00 OB FF 00 00 00 Fl 00 00 02 03 00 OF 00 00 oc oc 00 00 OF OF FF 00 00 00 00 00 88 00 FF 00 FF 00 00 00 07 FF 00 FF 00 00 00 00 00 0
35. Hz where 20 xf dB a fis the signal freguency in hertz The transmission magnitude response of the TCTF in dB is given by the following eguation for 3 0 Gbps 121 20 x log ple x 6 5x 10 Xx 20X10 x f 3 3 x 10 x f dB for 50 MHz lt f lt 3 0 GHz and 1571 10 884dB for 3 0 GHz lt f lt 5 0 GHz where a fis the signal freguency in hertz The TCTF is used to specify the reguirements on transmitters that may or may not incorporate pre emphasis or other forms of compensation A compliance interconnect is any physical interconnect with loss egual to or greater than that of the TCTF at the above freguencies that also meets the ISI loss reguirements shown in fig ure 28 and figure 29 Compliance with the TCTF test load reguirement is verified by measuring the signal produced by the transmit ter through a physical compliance interconnect attached to the transmitter Compliance with the zero length test load reguirement verified by measurement made across a load eguiva lent to the zero length load shown in figure 27 For both test load cases the transmitter delivers the output voltages and timing listed in table 17 at the desig nated compliance points The default mask is IR for intra cabinet TxRx connections The eye masks are shown in 9 5 2 1 Cheetah 15K 4 SAS Product Manual Rev B 69 Figure 26 shows the compliance interconnect test load 50 ohm SAS internal connector Figu
36. P 1 200 1 600 2 x Z1 mV P P 325 275 x1 Ul 0 275 0 275 X2 Ul 0 50 0 50 Skew ps 80 75 Max voltage non op mV P P 2 000 2 000 Minimum OOB ALIGN burst amplitude mV P P 240 240 Maximum noise during OOB idle time mV P P 120 120 Max near end crosstalk mV P P 100 100 a The value for X1 shall be half the value given for total jitter in table 18 The test or analysis shall include the effects of a single pole high pass freguency weighting function that progressively attenuates jitter at 20 dB decade below a freguency of bit rate 1 667 The value for X1 applies at a total jitter probability of 1071 At this level of probability direct visual comparison between the mask and actual signals is not a valid method for determining compliance with the jitter output reguirements With a measurement bandwidth of 1 5 times the baud rate i e 4 5 GHz for 3 0 Gbps The skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical link The same stable trigger coherent to the data stream shall be used for both the Rx and Rx signals Skew is defined as the time difference between the means of the midpoint crossing times of the Rx signal and the Rx signal Near end crosstalk is the unwanted signal amplitude at receiver terminals DR CR and XR coupled from signals and noise sources other than the desired signal Refer to SFF 8410 9 5 2 3 1 Jitter Table 18 defines the maximum allowable j
37. S 1 64 2 70 1 52 2 74 Table 4 ST336754SSDC power reguirements ST336754SS ST336754SS 3 Gbit mode 1 5 Gbit mode Notes Amps Amps Amps Amps Voltage 5V 12V 2 5V 12V 2 Regulation 5 5 5 2 15 5 2 Avg idle current DCX 1 7 1 01 0 44 1 07 0 44 Maximum starting current peak DC DC 30 3 1 17 1 58 1 20 1 59 peak AC AC 30 3 1 65 3 43 1 52 3 39 Delayed motor start max DC 30 1 4 1 02 0 04 0 91 0 04 Peak operating current Typical DCX 1 6 1 12 0 83 1 01 0 83 Maximum DC 30 1 1 14 0 85 1 02 0 85 Maximum peak DC 3s 1 64 2 56 1 52 2 58 1 2 3 26 Measured with average reading DC ammeter Instantaneous 12V current peaks will exceed these val ues Power supply at nominal voltage N number of drives tested 6 35 Degrees C ambient For 12 V a 10 tolerance is allowed during initial spindle start but must return to 5 before reaching 14 904 RPM The 5 must be maintained after the drive signifies that its power up sequence has been completed and that the drive is able to accept selection by the host initiator See 12V current profile in Figure 2 Cheetah 15K 4 SAS Product Manual Rev B 4 5 6 7 This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive See paragraph 6 2 1 Conducted noise immunity Specified voltage toleran
38. Self Monitoring Analysis and Reporting Technology This technology is intended to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a failure to allow you to back up the data before an actual failure occurs Note The drive s firmware monitors specific attributes for degradation over time but can t predict instanta neous drive failures Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating per formance of the drive and the thresholds are optimized to minimize false and failed predictions Controlling S M A R T The operating mode of S M A R T is controlled by the DEXCPT and PERF bits on the Informational Exceptions Control mode page 1Ch Use the DEXCPT bit to enable or disable the S M A R T feature Setting the DEX CPT bit disables all S M A R T functions When enabled S M A R T collects on line data as the drive performs normal read and write operations When the PERF bit is set the drive is considered to be in On line Mode Only and will not perform off line functions You can measure off line attributes and force the drive to save the data by using the Rezero Unit command Forcing S M A R T resets the timer so that the next scheduled interrupt is in two hours You can interrogate the drive through the host to determine the time remaining before the next scheduled mea surement and data logging process occurs To
39. ack of the current number of operations is referred to as the Interval Counter S M A R T measures error rates All errors for each monitored attribute are recorded A counter keeps track of the number of errors for the current interval This counter is referred to as the Failure Counter Error rate is the number of errors per operation The algorithm that S M A R T uses to record rates of error is to set thresholds for the number of errors and their interval If the number of errors exceeds the threshold before the interval expires the error rate is considered to be unacceptable If the number of errors does not exceed the threshold before the interval expires the error rate is considered to be acceptable In either case the inter val 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 unacceptably 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 each time the error rate is unacceptable and decremented not to exceed zero whenever the error rate is acceptable If the counter continually increments such that it reaches the pre dictive threshold a predictive failure is signaled This counter is referred to as the Failure History Counter There is a separate Failure History Counter for each attribute 5 2 5 Thermal monito
40. an be used as a cache The buffer can be divided into logical segments using Mode Select Page 08h byte 13 from which data is read and to which data is written The drive keeps track of the logical block addresses of the data stored in each segment of the buffer If the cache is enabled see RCD bit in the SAS Interface Manual data reguested by the host with a read command is retrieved from the buffer if possible before any disc access is initiated If cache operation is not enabled the buffer still segmented with the reguired number of segments is still used but only as circular buffer segments during disc medium read operations disregarding Prefetch operation for the moment That is the drive does not check in the buffer segments for the reguested read data but goes directly to the medium to retrieve it The retrieved data merely passes through some buffer segment on the way to the host On a cache miss all data transfers to the host are in accordance with buffer full ratio rules On a cache hit the drive ignores the buffer full ratio rules See the explanation provided with the information about Mode Page 02h disconnect reconnect control in the SAS Interface Manual The following is a simplified description of the prefetch cache operation Case A read command is received and the first logical block is already in the cache 1 Drive transfers to the initiator the first logical block reguested plus all subseguent contiguous logical
41. applications 15 Reliability specifications 17 5 1 Ertorirates Sao nana an e I Panen ante 17 5 1 1 Recoverable Errors sac eae sae ted oa ne Pau ass Basa HR 17 5 1 2 Unrecoverable Errofs 17 5 1 3 SGK GOLS Pet Ana ra pet a oe agan Tabanan aden bra pe 18 5 1 4 Interface Eror 45 4 Docta co o b oa r n ka hi banja 18 5 2 Reliability and service a 18 5 2 1 Annualized Failure Rate AFR 18 5 2 2 Preventive maintenance 18 5 2 3 Hot plugging the drive 18 5 2 4 SIMA A os Ketan mn mah as A ada etd a PDA To MN En 19 5 2 5 Thermal MONITOR tarotista E Pn apk 20 5 2 6 Drive Self Test DST 5 apar pet zna rd 21 5 2 7 Product warranty Ma bia 2 Gut gaa A Ea ea 23 Physical electrical specifications 25 6 1 AC power reguirements eet 25 6 2 DC power reguirements a 25 6 2 1 Conducted noise immunity 27 6 2 2 Power seguencing tee ae 27 6 2 3 Current profiles 27 6 3 Power CISSIDALION yo maa Sk a Gy DNJA NA Bin le ae 31 Cheetah 15K 4 SAS Product Manual Rev B 6 4 Environmen
42. at you do not physically distort the drive by attempting to mount it on a stiff non flat surface The allowable mounting surface stiffness is 80 Ib in 14 0 N mm The following equation and paragraph define the allowable mounting surface stiffness KxX F lt 15lb 67N where K is the mounting surface stiffness units in Ib in or N mm and X is the out of plane surface distortion units in inches or millimeters The out of plane distortion X is determined by defining a plane with three of the four mounting points fixed and evaluating the out of plane deflection of the fourth mounting point when a known force F is applied to the fourth point 8 4 Grounding Signal ground PCBA and HDA ground are connected together in the drive and cannot be separated by the user The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri cally isolating shock mounts If it is desired for the system chassis to not be connected to the HDA PCBA ground the systems integrator or user must provide a nonconductive electrically isolating method of mount ing the drive in the host equipment Increased radiated emissions may result if you do not provide the maximum surface area ground connection between system ground and drive ground This is the system designer s and integrator s responsibility Cheetah 15K 4 SAS Product Manual Rev B 43 44 Cheetah 15K 4 SAS Product Manual Rev B 9 0 Interface reguiremen
43. ature is 60 C Operation of the drive at the maximum case tem perature is intended for short time periods only Continuous operation at the elevated temperatures will reduce product reliability Non operating 40 to 158 F 40 to 70 C package ambient with a maximum gradient of 36 F 20 C per hour This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive Figure 14 Location of the HDA temperature check point 34 Cheetah 15K 4 SAS Product Manual Rev B 6 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 20 per hour Non operating 5 to 95 non condensing relative humidity 6 4 3 Effective altitude sea level a Operating 1 000 to 410 000 feet 305 to 13 048 meters Non operating 1 000 to 440 000 feet 305 to 12 210 meters 6 4 4 Shock and vibration Shock and vibration limits specified in this document are measured directly on the drive chassis If the drive is installed in an enclosure to which the stated shock and or vibration criteria is applied resonances may occur internally to the enclosure resulting in drive movement in excess of the stated limits If this situation is apparent it may be necessary to modify the enclosure to minimize drive movement The limits of shock and vibration defined
44. aximum available capacity at a given block size but the excess capacity above the guaranteed level will vary between other drive families and from generation to genera tion depending on how each block 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 the absolute maximum capacity potential but the user must determine if the extra capacity potential is useful or whether their assurance of backward and for ward compatibility takes precedence 3 6 Programmable drive capacity Using the Mode Select command the drive can change its capacity to something less than maximum See the Mode Select 6 parameter list table in the SAS Interface Manual part number 100293071 A value of zero in the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted to have A number other than zero and less than the maximum number of LBAs in the Number of Blocks field changes the total drive capacity to the value in the Number of Blocks field A value greater than the maximum number of LBAs is rounded down to the maximum capacity 3 7 Factory installed accessories OEM standard drives are shipped with the Cheetah 15K 4 SAS Installation Guide part number 100350602 Cheetah 15K 4 SAS Product Manual Rev B 9 3 8 Factory installed options You may o
45. bit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 12 0 watts 40 95 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vertical axis To calculate BTUs per hour multiply watts by 3 4123 ST373454SS DC CURRENT POW ER vs THROUGHPUT 1 5 Gbit Random 8 Block Reads 1800 e 5Volt A 12 Volt A 1600 4 Watts 1400 Tu o 9 1200 3 a 3 a 1000 E 0 800 0 600 0 400 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 Os per Second Figure 11 ST373454SS 1 5 Gbit DC current and power vs input output operations per second 32 Cheetah 15K 4 SAS Product Manual Rev B ST336754SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 10 33 watts 35 25 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vertical axis To calculate BTUs per hour multiply watts by 3 4123 ST336754SS DC CURRENT POWER vs THROUGHPUT 3 Gbit Random 8 Block Reads 1800 1
46. ce includes ripple noise and transient response Operating condition is defined as random 8 block reads with 225 l Os per second for ST3146854SS drives 230 l Os per second for ST373454SS drives and 230 l Os per second for ST336754SS drives Current and power specified at nominal voltages Decreasing 5 volt supply by 5 increases 5 volt cur rent by 2 5 Decreasing 12 volt supply by 5 increases 12 volt current by 3 0 for ST3146854SS models 2 0 for ST373454SS models and 2 0 for ST336754SS models During idle the drive heads are relocated every 60 seconds to a random location within the band from three guarters to maximum track General DC power reguirement notes 1 Minimum current loading for each supply voltage is not less than 1 7 of the maximum operating current shown 2 The 5V and 12V supplies should 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 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 6 2 1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz Maximum allowed noise values given below are peak to peak measurements and apply at the drive p
47. ct Manual Rev B 2 0 Standards compliance and reference documents The drive has been developed as asystem peripheral to the highest standards of design and construction The drive depends on its host eguipment to provide adeguate power and environment for optimum performance and compliance with applicable industry and governmental regulations Special attention must be given in the areas of safety power distribution shielding audible noise control and temperature regulation In particular the drive must be securely mounted to guarantee the specified performance characteristics Mounting by bot tom holes must meet the reguirements of Section 8 3 2 1 Standards The Cheetah SAS family complies with Seagate standards as noted in the appropriate sections of this manual and the Seagate SAS Interface Manual part number 100293071 The Cheetah disc drive is a UL recognized component per UL1950 CSA certified to CAN CSA C22 2 No 950 95 and VDE certified to VDE 0805 and EN60950 2 1 1 Electromagnetic compatibility The drive as delivered is designed for system integration and installation into a suitable enclosure prior to use The drive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC Rules and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reaso
48. d as a running disparity error illegal code loss of word sync or CRC error 5 2 Reliability and service You can enhance the reliability of Cheetah disc drives by ensuring that the drive receives adequate cooling Section 6 0 provides temperature measurements and other information that may be used to enhance the ser vice life of the drive Section 8 2 provides recommended air flow information 5 2 1 Annualized Failure Rate AFR The production disc drive shall achieve an AFR of 0 62 when operated in an environment that ensures the HDA case temperatures specified in Section 6 4 are not exceeded Short term excursions up to the specifica tion limits of the operating environment will not affect AFR performance Continual or sustained operation at case temperatures above the values shown in Section 6 4 1 may degrade product reliability Estimated power on operation hours means power up hours per disc drive times the total number of disc drives in service Each disc drive shall have accumulated at least nine months of operation Data shall be cal culated on a rolling average base for a minimum period of six months AFR is based on the following assumptions 8 760 power on hours per year 250 average on off cycles per year e Operations at nominal voltages e Systems will provide adequate cooling to ensure the case temperatures specified in Section 6 4 1 are not exceeded Drive failure means any stoppage or substandard performance ca
49. d commands If the number of write data logical blocks exceed the size of the segment being written into when the end of the segment is reached the data is written into the beginning of the same cache segment overwriting the data that was written there at the beginning of the operation however the drive does not overwrite data that has not yet been written to the medium If write caching is enabled WCE 1 then the drive may return Good status on a write command after the data has been transferred into the cache but before the data has been written to the medium If an error occurs while writing the data to the medium and Good status has already been returned a deferred error will be gen erated The Synchronize Cache command may be used to force the drive to write all cached write data to the medium Upon completion of a Synchronize Cache command all data received from previous write commands will have been written to the medium Table 9 3 2 1 shows the mode default settings for the drive 4 5 2 Prefetch operation If the Prefetch feature is enabled data in contiguous logical blocks on the disc immediately beyond that which was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer to the host on subsequent Read commands that request those logical blocks this is true even if cache operation is disabled Though the prefetch operation uses the buffer as a cache finding the requested da
50. e data stream shall be used for both the Tx and Tx signals Skew is defined as the time difference between the means of the midpoint crossing times of the Tx signal and the Tx signal The transmitter off voltage is the maximum A C voltage measured at compliance points when the transmitter is unpowered or transmitting D C idle e g during idle time of an OOB signal Rise fall times are measured from 20 to 80 of the transition with a repeating 0101b pattern on the physical link The maximum difference between the V and V A C RMS transmitter amplitudes measured on a CJTPAT test pattern see 9 5 2 3 3 into the test load shown in figure 27 as a percentage of the average of the V and V A C RMS amplitudes The maximum difference in the average differential voltage D C offset component between the burst times and the idle times of an OOB signal The maximum difference in the average of the common mode voltage between the burst times and the idle times of an OOB signal Cheetah 15K 4 SAS Product Manual Rev B 65 9 5 2 3 Receiver signal characteristics Table 17 defines the compliance point reguirements of the signal at the receiver end of a TxRx connection as measured into the test loads specified in figure 26 and figure 27 Table 17 Receiver signal characteristics Signal characteristic Units 1 5 Gbps 3 0 Gbps Jitter see figure 23 N A See table 18 See table 18 2 x Z2 mV P
51. e imbalance 9 ohm 5 5 Common mode impedance ohm 15 min 40 max 15 min 40 max a All times indicated for time domain reflectometer measurements are recorded times Recorded times are twice the transit time of the time domain reflectometer signal b All measurements are made through mated connector pairs c The media impedance measurement identifies the impedance mismatches present in the media when terminated in its characteristic impedance This measurement excludes mated connectors at both ends of the media when present but includes any intermediate connectors or splices The mated connectors measurement applies only to the mated connector pair at each end as applicable d Where the media has an electrical length of gt 4 ns the procedure detailed in SFF 8410 or an eguivalent procedure shall be used to determine the impedance e The receiver termination impedance specification applies to all receivers in a TxRx connection and covers all time points between the connector nearest the receiver the receiver and the transmission line terminator This measurement shall be made from that connector f At the time point corresponding to the connection of the receiver to the transmission line the input capacitance of the receiver and its connection to the transmission line may cause the measured impedance to fall below the minimum impedances specified in this table The area of the impedance dip amplitude as p the reflection c
52. ed negotiation looses sync before the second port completes speed negotiation both ports revert back to the power on condition of allow ing either link rate 1 5 or 3 0 Gbits sec Subject to buffer availability the Cheetah drives support Concurrent port transfers The drive supports receiving COMMAND TASK management transfers on both ports at the same time e Full duplex The drive supports sending XFER RDY DATA and RESPONSE transfers while receiving frames on both ports 46 Cheetah 15K 4 SAS Product Manual Rev B 9 3 SCSI commands supported Table 8 lists the SCSI commands supported by Cheetah drives Table 8 Commands supported by Cheetah 15K 4 SAS family drives Command name Command code Supported Change Definition 40h Compare 39h Copy 18h Copy and Verify 3Ah Format Unit 1 04h DPRY bit supported DCRT bit supported STPF bit supported IP bit supported DSP bit supported IMMED bit supported VS vendor specific Inquiry 12h Date Code page C1h Device Behavior page C3h Firmware Numbers page COh Implemented Operating Def page 81h Jumper Settings page C2h Supported Vital Product Data page 00h Unit Serial Number page 80h Lock unlock cache 36h Log Select 4Ch PCR bit DU bit DS bit TSD bit ETC bit TMC bit LP bit Log Sense 4Dh Application Client Log page OFh
53. ee MAJE En JEN 36 Physical dimensions 4 a on et Mn ei ee Ba Paku Esa panah Bra 38 Physical intemace esse etal PLA ELA Aa SERA EN KN Pa eae PR A 41 AI NOW il an aa IN na EN KE alata I ewe 42 Physical Interface kesat nasa AAA AA NU See Aree E eines 57 SAS connector dimensions edeu Rene ne eee dlje ee Ae be he ec eed os 58 SAS connector dimensions spisi Gna vee STA EE Qe baw Seb ead eee a etic es dee 59 SAS transmitters and receivers 0 a 61 Receive eye MASK ion Bea peta heey UVE a eg wae AKN DR IA 63 Reveive tolerance eye mask Wi 63 Sinusoidal fit er MASK viii kani wl eck eee aad o BR 64 Compliance interconnect test load 70 Zero length teStIOAG vecina oo coco daan nie Ra cee teed oe ted bbe beg 3 70 ISloss example at 3 0 GBPS us tania tante obv anal geal Sed ee eh ae en See eh tee z 70 ISI loss example at 1 5 Gbps iii 71 Cheetah 15K 4 SAS Product Manual Rev B 1 Cheetah 15K 4 SAS Product Manual Rev B 1 0 Scope This manual describes Seagate Technology LLC Cheetah SAS Serial Attached SCSI disc drives Cheetah drives support the SAS Protocol specifications to the extent described in this manual The SAS Inter face Manual part number 100293071 describes the general SAS characteristics of this and other Seagate SAS drives Figure 1 Cheetah 15K 4 SAS disc drive Cheetah 15K 4 SAS Product Manual Rev B 1 Cheetah 15K 4 SAS Produ
54. eguirements 17 environmental control 37 error management 39 rates 17 F FCC rules and regulations 3 features 8 interface 45 firmware 8 corruption 50 flawed sector reallocation 8 Format command execution time 12 function complete code 00 45 not supported code 05 45 reject code 04 45 G Good status 56 gradient 34 35 ground shift noise 61 grounding 43 H HDA 42 43 head and disc assembly HDA 7 head and disc assembly See HDA heads read write data 11 heat removal 42 heat source 42 host eguipment 43 hot plugging the drive 18 humidity 35 humidity limits 34 inguiry data 51 installation 41 guide 5 interface commands supported 47 error rate 17 errors 18 illustrated 57 physical 57 reguirements 45 interleave 80 minimum 12 intermediate condition met good status 56 intermediate good status 56 internal data rate 11 internal defects errors 39 internal drive characteristics 11 J jumpers 41 L latency average rotational 11 12 logical block address 13 logical block reallocation scheme 8 logical block size 8 12 logical segments 13 LSI circuitry 9 maintenance 17 maximum delayed motor start 25 26 maximum Start current 25 26 media description 8 minimum sector interleave 12 miscellaneous feature support Adaptive caching 56 Asynchronous event notification 56 Automatic contingent allegiance 56 Deferred error handling 56 Parameter rounding 56 Queue tagging 56 Reporting actual retry count 56 Se
55. ement is tested through read write read operations The integrity of the media is checked through a read verify scan of the media Motor functionality is tested by default as a part of these tests The anticipated length of the Extended test is reported through the Control Mode page 5 2 6 2 4 Log page entries When the drive begins DST it creates a new entry in the Self test Results Log page The new entry is created by inserting a new self test parameter block at the beginning 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 there are more than 20 parameter blocks the least recent parameter block will be deleted The new parameter block will be initialized as follows 1 The Function Code field is set to the same value as sent in the DST command 22 Cheetah 15K 4 SAS Product Manual Rev B 2 The Self Test Results Value field is set to Fh 3 The drive will store the log page to non volatile memory After a self test is complete or has been aborted the drive updates the Self Test Results Value field in its Self Test Results Log page in non volatile memory The host may use Log Sense to read the results from up to the last 20 self tests performed by the drive The self test results value is a 4 bit field that reports the results of the test lf the field is set to zero the drive passed with no error
56. er shall tolerate Table 19 Receiver jitter tolerance 1 5 Gbps3 3 0 Gbps Sinusoidal Deterministic Total Sinusoidal Deterministic Total jitter jitter t jitter jitter gt 4 jitter 9h jitter 0 10 0 35 0 65 0 10 0 35 0 65 a Units are in UI b The jitter values given are normative for a combination of deterministic jitter random jitter and sinusoidal jitter that receivers shall be able to tolerate without exceeding a BER of 10 Receivers shall tolerate sinusoidal jitter of progressively greater amplitude at lower frequencies according to the mask in figure 25 with the same deterministic jitter and random jitter levels as were used in the high frequency sweep c Sinusoidal swept frequency 900 kHz to gt 5 MHz d Sinusoidal swept frequency 1 800 kHz to gt 5 MHz e No value is given for random jitter For compliance with this standard the actual random jitter amplitude shall be the value that brings total jitter to the stated value at a probability of 10 2 The additional 0 1 UI of sinusoidal jitter is added to ensure the receiver has sufficient operating margin in the presence of external interference f Deterministic jitter 900 KHz to 750 MHz g Deterministic jitter 1 800 kHz to 1 500 MHz h The deterministic and total values in this table apply to jitter after application of a single pole high pass frequency weighting function that progressively attenuates jitter at 20 dB decade below a freque
57. er than the X1 points in the receive masks due to the addition of sinusoidal jitter Figure 25 defines the sinusoidal jitter mask Peak to peak eee sinusoidalA Sinusoidal jitter frequency jitter log log plot in Ul K From 1 5 x 10 for 1 5 Gbps 15 Fuom 3 0 x 10 for 3 0 Gbps 1 0 0 1 0 Fnom 25 000 From 1 667 Freguency in kHz Figure 25 Sinusoidal jitter mask 64 Cheetah 15K 4 SAS Product Manual Rev B 9 5 2 2 Transmitter signal characteristics Table 16 specifies the signal reguirements at the transmitter end of a TxRx connection as measured into the zero length test load All specifications are based on differential measurements The OOB seguence is performed at signal voltage levels corresponding to the lowest supported transfer rate Table 16 specifies the signal characteristics Table 16 Transmitter signal characteristics Signal characteristic Units 1 5 Gbps 3 0 Gbps Skew ps 20 15 Tx Off Voltage mV P P 50 50 Maximum rise fall time ps 213 137 Minimum rise fall time ps 67 67 Maximum transmitter output imbalance Yo 10 10 OOB offset delta mV 25 25 OOB common mode deltaY mV 50 50 a All tests in this table shall be performed with zero length test load shown in figure 27 b o The skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical link The same stable trigger coherent to th
58. fications The following reliability specifications assume correct host and drive operational interface including all inter face timings power supply voltages environmental reguirements and drive mounting constraints Seek error rate Less than 10 errors in 108 seeks Read Error Rates Recovered Data Less than 10 errors in 10 bits transferred OEM default settings Unrecovered Data Less than 1 sector in 1015 bits transferred Miscorrected Data Less than 1 sector in 10 bits transferred Interface error rate Less than 1 error in 10 bits transferred Annualized Failure Rate AFR 0 62 see section 5 2 1 Service Life 5 years Preventive maintenance None reguired 1 Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated 5 1 Error rates The error rates stated in this manual assume the following e The drive is operated in accordance with this manual using DC power as defined in paragraph 6 2 DC power reguirements Errors caused by host system failures are excluded from error rate computations Assume random data e Default OEM error recovery settings are applied This includes AWRE ARRE full read retries full write retries and full retry time 5 1 1 Recoverable Errors Recovereable errors are those detected and corrected by the drive and do not reguire user intervention Recoverable Data errors will use correction although ECC on the fly is not considered for pur
59. g page see Table 1 can 20 Cheetah 15K 4 SAS Product Manual Rev B be used to set this trip point The default value for this drive is 65 C however you can set it to any value in the range of 0 to 65 If you specify a temperature greater than 65 C in this field the temperature is rounded down to 65 C A sense code is sent to the host to indicate the rounding of the parameter field Table 1 Temperature Log Page ODh Parameter Code Description 0000h Primary Temperature 0001h Reference Temperature 5 2 6 Drive Self Test DST Drive Self Test DST is a technology designed to recognize drive fault conditions that gualify the drive as a failed unit DST validates the functionality of the drive at a system level There are two test coverage options implemented in DST 1 Extended test 2 Short text The most thorough option is the extended test that performs various tests on the drive and scans every logical block address LBA of the drive The short test is time restricted and limited in length it does not scan the entire media surface but does some fundamental tests and scans portions of the media If DST encounters an error during either of these tests it reports a fault condition If the drive fails the test remove it from service and return it to Seagate for service 5 2 6 1 DST failure definition The drive will present a diagnostic failed condition through the self tests results value of the diagnost
60. gmented caching 56 SMP 1 in Mode Select command 56 Synchronized locked spindle operation 56 Zero latency read 56 miscellaneous status support ACA active 56 ACA active faulted initiator 56 Busy 56 Check condition 56 Condition met good 56 Good 56 Intermediate condition met good 56 Intermediate good 56 Reservation conflict 56 Task set full 56 miscorrected media data 17 Mode sense data table 51 53 mounting 43 holes 43 orientations 41 Cheetah 15K 4 SAS Product Manual Rev B MTBF 17 18 34 MTBF see AFR 18 N noise audible 3 noise immunity 27 non operating 35 37 temperature 34 non operating vibration 37 O office environment 37 operating 35 37 operating environment 18 option selection 60 options 10 orientation 35 out of plane distortion 43 P package size 36 package test specification 5 packaged 36 parameter rounding 56 PCBA 43 peak bits perinch 11 peak operating current 25 26 peak to peak measurements 27 performance characteristics detailed 11 general 12 performance degradation 35 performance highlights 8 physical damage 37 physical dimensions 38 physical interface 57 physical specifications 25 pin descriptions 60 power 61 dissipation 31 reguirements AC 25 reguirements DC 25 seguencing 27 power distribution 3 power on operating hours 18 power up hours 18 prefetch multi segmented cache control 13 preventive maintenance 17 Q queue tagging 56 Cheetah 15K 4 SAS Product Manual Rev
61. hall not exhibit device damage or performance degradation Shock may be applied in the X Y or Z axis The drive subjected to nonrepetitive shock not exceeding 250 Gs at a maximum duration of 2 msec half sinewave does not exhibit device damage or performance degradation Shock may be applied in the X Y or Z axis The drive subjected to nonrepetitve shock not exceeding 100 Gs at a maximum duration of 0 5 msec half sinewave does not exhibit device damage or performance degradation Shock may be applied in the X Y or Z axis Cheetah 15K 4 SAS Product Manual Rev B 35 d Packaged Disc drives shipped as loose load not palletized general freight will be packaged to withstand drops from heights as defined in the table below For additional details refer to Seagate specifications 30190 001 under 100 Ibs 45 kg or 30191 001 over 100 Ibs 45 Kg Package size Packaged product weight Drop height lt 600 cu in 9 800 cu cm Any 60 in 1524 mm 600 1800 cu in 9 800 19 700 cu cm 0 20 Ib Oto 9 1 kg 48 in 1219 mm 21800 cu in gt 19 700 cu cm 0 20 lb Oto 9 1 kg 42 in 1067 mm 2600 cu in gt 9 800 cu cm 20 40 Ib 9 1 to 18 1 kg 36 in 914 mm 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 from 48 inches 1 070 mm against a concrete floor or eguivalent Figure 15 Recommended mounting 3
62. haracteristics of the LED drive signals Table 14 LED drive signal State Test condition Output voltage LED off high 0 V lt VOH lt 3 6 V 100 uA lt loy lt 100 yA LED on low lo 15 mA 0 lt VoL lt 0 225 V 9 5 2 Differential signals The drive SAS differential signals comply with the intra enclosure internal connector requirements of the SAS standard Table 15 defines the general interface characteristics Table 15 General interface characteristics Characteristic Units 1 5 Gbps 3 0 Gbps Bit rate nominal Mbaud 1 500 3 000 Unit interval Ul nominal ps 666 6 333 3 Impedance nominal differential ohm 100 100 Transmitter transients maximum V 1 2 t1 2 Receiver transients maximum V t1 2 1 2 9 5 2 1 Eye masks 9 5 2 1 1 Eye masks overview The eye masks are graphical representations of the voltage and time limits on the signal at the compliance point The time values between X1 and 1 X1 cover all but 1071 of the jitter population The random content of the total jitter population has a range of 7 standard deviations 62 Cheetah 15K 4 SAS Product Manual Rev B 9 5 2 1 2 Receive eye mask Figure 23 describes the receive eye mask This eye mask applies to jitter after the application of a single pole high pass freguency weighting function that progressively attenuates jitter at 20 dB decade below a freguency of bit rate 1 667 Absolute amplitude
63. ic log page if a functional failure is encountered during DST The channel and servo parameters are not modified to test the drive more stringently and the number of retries are not reduced All retries and recovery processes are enabled during the test If data is recoverable no failure condition will be reported regardless of the number of retries reguired to recover the data The following conditions are considered DST failure conditions Seek error after retries are exhausted Track follow error after retries are exhausted e Read error after retries are exhausted e Write error after retries are exhausted Recovered errors will not be reported as diagnostic failures 5 2 6 2 Implementation This section provides all of the information necessary to implement the DST function on this drive Cheetah 15K 4 SAS Product Manual Rev B 21 5 2 6 2 1 State of the drive prior to testing The drive must be in a ready state before issuing the Send Diagnostic command There are multiple reasons why a drive may not be ready some of which are valid conditions and not errors For example a drive may be in process of doing a format or another DST Itis the responsibility of the host application to determine the not ready cause While not technically part of DST a Not Ready condition also gualifies the drive to be returned to Seagate as a failed drive A Drive Not Ready condition is reported by the drive under the following conditions
64. ical axis To calculate BTUs per hour multiply watts by 3 4123 ST3146854SS DC CURRENT POWER vs THROUGHPUT 1 5 Gbit nino Random 8 Block Reads i 5Volt A 12 Volt A 1600 4 Watts 1400 v o 1200 5 3 a 1 000 z 0 800 0 600 0 400 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 1 Os per Second Figure 9 ST3146854SS 1 5 Gbit DC current and power vs input output operations per second Cheetah 15K 4 SAS Product Manual Rev B 31 ST373454SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 11 8 watts 40 27 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vertical axis To calculate BTUs per hour multiply watts by 3 4123 ST373454SS DC CURRENT POWER vs THROUGHPUT 3 Gbit Random 8 Block Reads 1800 18 00 BVoltA 12 Volt A 1 600 4 Watts 1 400 Tu 2 1200 8 o 1000 5 lt a OBODNE Ee APA AP AAA a A A Ea ETEA 8 00 01600 SA 2 aa aa Lana aa Da aa Da 6 00 0 400 7 7 7 7 7 7 7 4 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 Os per Second Figure 10 ST373454SS 3 Gbit DC current and power vs input output operations per second ST373454SS in 1 5 G
65. ical when measured to ISO 7779 specification There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea sured according to Seagate specification 30553 001 There will not be any tones more than 24 dB above the masking noise on any drive 6 4 8 Electromagnetic susceptibility See Section 2 1 1 1 6 5 Mechanical specifications Refer to Figure 16 for detailed physical dimensions See Section 8 3 Drive mounting Height 1 000 in 25 4 mm Width 4 000 in 101 6 mm Depth 5 75 in 146 05 mm Weight 1 5 pounds 0 68 kilograms si x 26 11 MAX xX 1 028 MAX 2X 20 14 i i 2X 793 i H M k E 7 me Y if 24 00 6 35 250 6X 6 32UNC 2B Z sei 245 THRU Y 4 22 X 90 B 166 X 90 2X 28 45 036 2X 1 120 6 014 Z x Y 2X 70 05 2X 2 758 122 00 4 803 UNITS OF MEASURE mm inches tf x 130 05 2X 5 120 Y HA Y a 146 99 MAX 5 787 MAX La 131 17 5 164 4X 6 32UNC 2B 85 60 3 370 v 4 57 MIN BLIND 18 MIN BLIND Z la 41 15 1 620 N P42 X 90 9166 X 90 793
66. ify 2Fh Y BYTCHK bit Y Write 0Ah Y Write and Verify 2Eh Y DPO bit Y Write Buffer modes 0 2 supported 3Bh Y Firmware Download option Y modes 5 7 Ah and Bh supported 3 Write Extended 2Ah Y DPO bit Y FUA bit Y Write Long 3Fh Y Cheetah 15K 4 SAS Product Manual Rev B 49 Table 8 Commands supported by Cheetah 15K 4 SAS family drives continued Command name Command code Supported Write Same 41h Y PBdata N LBdata N XDRead 52h N XDWrite 50h N XPWrite 51h N 1 Cheetah drives can format to any multiple of four bytes per logical block in the range 512 to 704 bytes 2 Warning Power loss during flash programming can result in firmware corruption This usually makes the drive inoperable 3 Reference Mode Sense command 1Ah for mode pages supported 4 Y Yes Command is supported N No Command is not supported A Support is available on special reguest 50 Cheetah 15K 4 SAS Product Manual Rev B 9 3 1 Inguiry data Table 9 lists the Inguiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual Table 9 Cheetah 15K 4 SAS inguiry data Bytes Data hex 0 15 00 00 03 12 8B 00 10 OA 53 45 41 47 41 54 45 20 Vendor ID 16 31 53 54 33 37 33 34 35 34 53 53 20 20 20 20 20 20 Product ID 32 47 R R R RA S S S
67. igure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 List of Figures Cheetah 15K 4 SAS disc drive 1 Typical ST3146854SS drive 12V current profile 28 Typical ST3146854SS drive 5V current profile 28 Typical ST373454SS drive 12V current profile 29 Typical ST373454SS drive 5V current profile 29 Typical ST336754SS drive 12V current profile 30 Typical ST336754SS drive 5V current profile 30 ST3146854SS 3 Gbit DC current and power vs input output operations per second 31 ST3146854SS 1 5 Gbit DC current and power vs input output operations per second 31 ST373454SS 3 Gbit DC current and power vs input output operations per second 32 ST373454SS 1 5 Gbit DC current and power vs input output operations per second 32 ST336754SS 3 Gbit DC current and power vs input output operations per second 33 ST336754SS 1 5 Gbit DC current and power vs input output operations per second 33 Location of the HDA temperature check point cect teens 34 Recommended Mounting win in le eps eae ela ele VEJE eee ONE JE als R
68. ions Pin Signal name Signal type Pin Signal name Signal type S1 Port A Ground P1 NC reserved 3 3Volts S2 Port A in Diff input pair P2 NC reserved 3 3Volts S3 PortA in P3 NC reserved 3 3Volts S4 Port A Ground P4 Ground S5 PortA out Diff output pair P5 Ground Se 4Port A out P6 Ground S7 Port A Ground P7 5 Volts charge S8 Port B Ground P8 5 Volts se PortB in Diff input pair P9 5 Volts 10 Port B_in P10 Ground 11 Port A Ground P11 Ready LED Open collector out 12 Port B_out Diff output pair P12 Ground S13 Port B out P13 12 Volts charge S14 Port B Ground P14 12 Volts P15 12 Volts Short pin to support hot plugging NC No connection in the drive 60 Cheetah 15K 4 SAS Product Manual Rev B 9 4 6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 22 The receiver is AC cou pling to eliminate ground shift noise Differential Transfer Medium Figure 22 SAS transmitters and receivers 9 4 7 Power The drive receives power 5 volts and 12 volts through the SAS device connector Three 12 volt pins provide power to the drive 2 short and 1 long The current return for the 12 volt power supply is through the common ground pins The supply current and return current must be distributed as evenly as possible am
69. itter Table 18 Maximum allowable jitter 1 5 Gbps 3 0 Gbps Deterministic jitter Total jittercd ef Deterministic jittere Total jittercd ef 0 35 0 55 0 35 0 55 om o Units are in Ul The values for jitter in this section are measured at the average amplitude point Total jitter is the sum of deterministic jitter and random jitter If the actual deterministic jitter is less than the maximum specified then the random jitter may increase as long as the total jitter does not exceed the specified maximum total jitter Total jitter is specified at a probability of 10 12 The deterministic and total values in this table apply to jitter after application of a single pole high pass freguency weighting function that progressively attenuates jitter at 20 dB decade below a freguency of bit rate 1 667 If total jitter received at any point is less than the maximum allowed then the jitter distribution of the signals is allowed to be asymmetric The total jitter plus the magnitude of the asymmetry shall not exceed the allowed maximum total jitter The numerical difference between the average of the peaks with a BER lt 10 12 and the average of the individual events is the measure of the asymmetry Jitter peak to peak measured lt maximum total jitter JAsymmetry 66 Cheetah 15K 4 SAS Product Manual Rev B 9 5 2 3 2 Receiver jitter tolerance Table 19 defines the amount of jitter the receiv
70. ity USA For European warranty service dial the toll free number for your specific location If your location is not listed here dial our European CSO warranty center at 31 20 316 7222 from 8 30 A M to 5 00 P M Central Europe time Monday through Friday The CSO warranty center is located in Amsterdam The Netherlands Seagate Service Centers Toll free support numbers Call center Presales and Technical Support Warranty Service Austria 00 800 47324289 Belgium 00 800 47324283 00 800 4SEAGATE 00 800 47324289 Denmark 00 800 47324283 00 800 47324289 France 00 800 47324283 00 800 47324289 Germany 00 800 47324283 00 800 47324289 Ireland 00 800 47324283 00 800 47324289 Italy 00 800 47324283 00 800 47324289 Netherlands 00 800 47324283 00 800 47324289 Norway 00 800 47324283 00 800 47324289 Poland 00 800 311 12 38 00 800 311 12 38 Spain 00 800 47324283 00 800 47324289 Sweden 00 800 47324283 00 800 47324289 Switzerland 00 800 47324283 00 800 47324289 Turkey 00 800 31 92 91 40 00 800 31 92 91 40 United Kingdom 00 800 47324283 00 800 47324289 FAX services All Europe toll call Technical Support 41 405 324 3339 Warranty Service 431 20 653 3513 Africa Middle East support services For presales and technical support in Africa and the Middle East dial our presales and technical support call center at 1 405 324 4714 from 8 00 A M to 11 45 A M and 1 00 P M to 5 00 P M Central Europe time Mon day through Friday The presales and tech
71. ject to the recovery time limit Note A recovery time limit of O will use the drive s default value of FF FF Minimum recovery time limit is achieved by setting the Recovery Time Limit field to 00 01 7 3 SAS system errors Information on the reporting of operational errors or faults across the interface is given in the SAS Interface Manual The SSP Response returns information to the host about numerous kinds of errors or faults The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive Status returned by the drive to the initiator is described in the SAS Interface Manual Status reporting plays a role in systems error management and its use in that respect is described in sections where the various com mands are discussed 40 Cheetah 15K 4 SAS Product Manual Rev B 8 0 Installation Cheetah disc drive installation is a plug and play process There are no jumpers switches or terminators on the drive SAS drives are designed to be used in a host system that provides a SAS compatible backplane with bays designed to accomodate the drive In such systems the host system typically provides a carrier or tray into which you need to mount the drive Mount the drive to the carrier or tray provided by the host system using four 6 32 UNC screws Do not over tighten or force the screws You can mount the drive in any orientation Note SAS drives are designed to be attached to the host system without I O or
72. k in any multiple of 4 bytes Industry standard SFF 2 5 inch dimensions Programmable logical block reallocation scheme Flawed logical block reallocation at format time Programmable auto write and read reallocation Reallocation of defects on command Post Format ECC maximum burst correction length of 320 bits No preventive maintenance or adjustments required Dedicated head landing zone Embedded servo design Automatic shipping lock Embedded servo design Self diagnostics performed when power is applied to the drive Zone bit recording ZBR Vertical horizontal or top down mounting Dynamic spindle brake 8 192 Kbyte data buffer see Section 4 5 Drive Self Test DST Background Media Scan BGMS Power Save 3 2 Media description The media used on the drive has an aluminum substrate coated with a thin film magnetic material overcoated with a proprietary protective layer for improved durability and environmental protection 3 3 Performance Programmable multi segmentable cache buffer 300 Mbytes sec maximum instantaneous data transfers 15k RPM spindle Average latency 2 0 msec Background processing of queue Supports start and stop commands spindle stops spinning Adaptive seek velocity improved seek performance Cheetah 15K 4 SAS Product Manual Rev B 3 4 Reliability Annualized Failure Rate AFR of 0 62 e LSI circuitry Balanced low mass rotary voice coil actuator e Incorporates industry standard Self M
73. m over frequency range Fem as specified in table 15 The jitter tolerance is shown in Figure 25 for all Rx compliance points in a TxRx connection The figure given assumes that any external interference occurs prior to the point at which the test is applied When testing the jitter tolerance capability of a receiver the additional 0 1 Ul of sinusoidal jitter may be reduced by an amount proportional to the actual externally induced interference between the applica tion point of the test and the input to the receiving phy The additional jitter reduces the eye opening in both voltage and time Cheetah 15K 4 SAS Product Manual Rev B 71 72 Cheetah 15K 4 SAS Product Manual Rev B 10 0 Seagate Technology support services Online services Internet www seagate com for information about Seagate products and services Worldwide support is available 24 hours daily by e mail for your guestions Presales Support www seagate com support email email presales html or Presales Seagate com Technical Support www seagate com support email email disc support html or DiscSupport Seagate com mySeagate my seagate com is the industry s first Web portal designed specifically for OEMs and distributors It provides self service access to critical applications personalized content and the tools that allow our partners to man age their Seagate account functions Submit pricing reguests orders and returns through a single password protected Web interface
74. n send questions or comments 24 hours daily and exchange messages with a technical support specialist during normal business hours for the call center in your region Cheetah 15K 4 SAS Product Manual Rev B 73 Customer Service Operations Warranty Service Seagate offers worldwide customer support for Seagate drives Seagate distributors OEMs and other direct customers should contact their Seagate Customer Service Operations CSO representative for warranty related issues Resellers or end users of drive products should contact their place of purchase or one of the Seagate CSO warranty centers for assistance Have your drive s ST model number and serial number avail able Data Recovery Services Seagate offers data recovery services for all formats and all brands of storage media Our Data Recovery Ser vices labs are currently located in North America To get a free guick guote or speak with a case management representative call 1 800 475 0143 Additional information including an online reguest form and data loss pre vention resources is available at www datarecovery seagate com Authorized Service Centers In some locations outside the US you can contact an Authorized Service Center for service USA Canada Latin America support services Seagate Service Centers Presales Support Call center Americas Technical Support Call center Americas Toll free 1 877 271 3285 Toll free 1 800 SEAGATE Customer Service
75. nable shielding The drive is capable of meeting the Class B limits of the FCC Rules and Regulations of the Canadian Department of Communications when properly packaged however it is the user s responsibility to assure that the drive meets the appropriate EMI reguirements in their system Shielded I O cables may be reguired if the enclosure does not provide adeguate shielding If the l O cables are external to the enclosure shielded cables should be used with the shields grounded to the enclosure and to the host controller 2 1 1 1 Electromagnetic susceptibility As a component assembly the drive is not reguired to meet any susceptibility performance reguirements It is the responsibility of those integrating the drive within their systems to perform those tests reguired and design their system to ensure that eguipment operating in the same system as the drive or external to the system does not adversely affect the performance of the drive See Tables 2 and 3 DC power reguirements Cheetah 15K 4 SAS Product Manual Rev B 3 2 2 Compliance 221 Electromagnetic compliance Seagate uses an independent laboratory to confirm compliance with the directives standards for CE Marking and C Tick Marking The drive was tested in a representative system for typical applications The selected sys tem represents the most popular characteristics for test platforms The system configurations include e Typical current use microprocessor 3 5 inch floppy di
76. ncy of bit rate 1 667 9 5 2 3 3 Compliant jitter test pattern CUTPAT The CJTPAT within a compliant protocol frame is used for all jitter testing unless otherwise specified See the SAS Interface Manual for definition of the required pattern on the physical link and information regarding spe cial considerations for scrambling and running disparity 9 5 2 3 4 Impedance specifications Table 20 defines impedance requirements Table 20 Impedance requirements Sheet 1 of 2 Requirement Units 1 5 Gbps 3 0 Gbps Time domain reflectometer rise time 20 to 80 ps 100 50 Media PCB or cable Differential impedance ohm 100 10 100 10 Differential impedance imbalanceb 53 9 ohm 5 5 Common mode impedance ohm 32 5 1 7 5 32 5 7 5 Mated connectors Differential impedance ohm 100 15 100 15 Differential impedance imbalance 49 ohm 5 5 Common mode impedance ohm 32 5 t 7 5 32 5 7 5 Receiver termination Differential impedance ohm 100 amp 15 100 15 Differential impedance imbalance 9 ohm 5 5 Receiver termination time constant ps 150 max 100 max Cheetah 15K 4 SAS Product Manual Rev B 67 Table 20 Impedance requirements Sheet 2 of 2 Reguirement Units 1 5 Gbps 3 0 Gbps Common mode impedance ohm 20 min 40 max 20 min 40 max Transmitter source termination Differential impedance ohm 60 min 115 max 60 min 115 max Differential impedanc
77. nical support call center is located in Oklahoma City USA For warranty service in Africa and the Middle East dial our European CSO warranty center at 31 20 316 7222 from 8 30 A M to 5 00 P M Central Europe time Monday through Friday or send a FAX to 31 20 653 3513 The CSO warranty center is located in Amsterdam The Netherlands Cheetah 15K 4 SAS Product Manual Rev B 75 Asia Pacific support services For Asia Pacific presales and technical support dial the toll free number for your specific location The Asia Pacific toll free numbers are available from 6 00 A M to 10 45 A M and 12 00 P M to 6 00 P M Australian East ern time Monday through Friday except as noted If your location is not listed here direct dial one of our tech nical support locations Warranty service is available from 9 00 A M to 6 00 P M April through October and 10 00 A M to 7 00 P M November through March Australian Eastern time Monday through Friday Seagate Service Centers Call center Toll free Direct dial FAX Australia 1800 14 7201 China Mandarin 4 800 810 9668 486 10 6225 5336 Hong Kong 800 90 0474 Hong Kong Cantonese 001 800 0830 1730 India2 4 1 600 180 1104 Indonesia 001 803 1 003 2165 Japan 4 0034 800 400 554 Korea 4 007 98 8521 7635 Malaysia 1 800 80 2335 New Zealand 0800 443988 Singapore 800 1101 150 65 6488 7525 Taiwan Mandarin 4 00 800 0830
78. oading new firmware into the flash E PROM Note Because there are often several different versions of drive control firmware in the total population of drives in the field the Mode Sense values given in the following tables may not exactly match those of some drives The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com mand pages for SCSI implementation see the SAS Interface Manual Definitions DEF Default value Standard OEM drives are shipped configured this way CHG Changeable bits indicates if default value is changeable 52 Cheetah 15K 4 SAS Product Manual Rev B 9 3 2 1 ta trj Page CHG Page ta Hj Page CHG Page ta trj Page CHG Page Z E tj Page CHG Page 2 ta trj Page CHG Page ta Hj Page CHG Page ke ta trj Page CHG Page Z ta H Page CHG Page se ta Hj Page CHG Page ta Hj Page CHG Page ke ta trj Page CHG Page ta trj Page CHG Page Z E La Page CHG Page ta trj Page CHG Page ST3146854SS Mode Sense data 0 0x00 0 0x00 1 0x01 1 0x01 2 0x02 2 0x02 3 0x03 3 0x03 4 0x04 4 0x04 1 0x07 7 0x07 8 0x08 8 0x08 10 0x0A 10 0x0A 00 B7 co FF 00 00 56 00 00 00 00 OF 14 02 03 06 10 00 00 10 9D 01 03 00 00 00 00
79. oefficient and duration in time caused by this capacitance is the receiver termination time constant The receiver time constant shall not be greater than the values shown in this table An approximate value for the receiver termination time constant is given by the product of the amplitude of the dip as p and its width in ps measured at the half amplitude point The amplitude is defined as being the difference in the reflection coefficient between the reflection coefficient at the nominal impedance and the reflection coefficient at the minimum impedance point The value of the receiver excess input capacitance is given by the following eguation receiver termination time constant pe RON RR where RO RR is the parallel combination of the transmission line characteristic impedance and termination resistance at the receiver g The difference in measured impedance to ground on the plus and minus terminals on the interconnect transmitter or receiver with a differential test signal applied to those terminals 9 5 2 4 Electrical TxRx connections TxRx connections may be divided into TxRx connection segments In a single TxRx connection individual TxRx connection segments may be formed from differing media and materials including traces on printed wir ing boards and optical fibers This subclause applies only to TxRx connection segments that are formed from electrically conductive media Each electrical TxRx connection segment
80. ogical block sizes Default is 512 byte data blocks Variable 512 to 704 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 Read write consecutive sectors on a track Yes Flaw reallocation performance impact for flaws reallocated at format time using Negligible the spare sectors per sparing zone reallocation scheme Average rotational latency 2 0 msec Assumes no errors and no relocated logical blocks Rate measured from the start of the first logical block transfer to or from the host 4 3 Star stop time The drive accepts the commands listed in the SAS Interface Manual less than 3 seconds after DC power has been applied If the drive receives a NOTIFY ENABLE SPINUP primitive through either port and has not received a START STOP UNIT command with the START bit egual to 0 the drive becomes ready for normal operations within 20 seconds excluding the error recovery procedure If the drive receives a START STOP UNIT command with the START bit egual to 0 before receiving a NOTIFY ENABLE SPINUP primitive the drive waits for a START STOP UNIT command with the START bit egual to 1 After receiving a START STOP UNIT command with the START bit egual to 1 the drive waits for a NOTIFY ENABLE SPINUP primitive After receiving a NOTIFY ENABLE SPINUP primitive through either port the drive becomes ready for normal operations within 20 seconds excluding the error recover
81. on refer to the standard terms and conditions of purchase for Seagate products on your pur chase documentation The remaining warranty for a particular drive can be determined by calling Seagate Customer Service at 1 800 468 3472 You can also determine remaining warranty using the Seagate web site www seagate com The drive serial number is reguired to determine remaining warranty information Shipping When transporting or shipping a drive use only a Seagate approved container Keep your original box Seagate approved containers are easily identified by the Seagate Approved Package label Shipping a drive in a non approved container voids the drive warranty Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran sit Contact your authorized Seagate distributor to purchase additional boxes Seagate recommends shipping by an air ride carrier experienced in handling computer eguipment Product repair and return information Seagate customer service centers are the only facilities authorized to service Seagate drives Seagate does not sanction any third party repair facilities Any unauthorized repair or tampering with the factory seal voids the warranty Cheetah 15K 4 SAS Product Manual Rev B 23 24 Cheetah 15K 4 SAS Product Manual Rev B 6 0 Physical electrical specifications This section provides information relating to the physical and electrical characteristics of the drive
82. on 56 audible noise 3 auto write and read reallocation programmable 8 automatic contingent allegiance 56 average idle current 25 26 average rotational latency 11 B backpanel 60 buffer data 8 space 13 busy status 56 bytes persurface 11 bytes pertrack 11 C cache operation 13 cache segments 14 caching write data 14 Canadian Department of Communications 3 Cheetah 15K 4 SAS Product Manual Rev B capacity unformatted 11 case temperature 34 check condition status 56 chemical pollutants 37 class B limit 3 clear ACA function 45 clear task set function 45 commands supported 47 condensation 35 condition met good status 56 connector illustrated 59 requirements 59 continuous vibration 37 cooling 42 corrosive environment 37 CRC error 18 Current profiles 27 customer service 23 D data block size modifing the 9 data buffer to from disc media 12 data heads read write 11 data rate internal 11 data transfer rate 12 DC power 60 requirements 25 defect and error management 39 deferred error handling 56 description 7 dimensions 38 disc rotation speed 11 drive 37 drive characteristics 11 drive failure 18 drive malfunction 18 drive mounting 38 43 drive select 60 dual port support 46 E electrical description of connector 60 signal characteristics 61 specifications 25 electromagnetic compatibility 3 electromagnetic susceptibility 38 EMI requirements 3 79 environment 42 environmental limits 34 r
83. ong the pins Three 5 volt pins provide power to the drive 2 short and 1 long The current return for the 5 volt power sup ply is through the common ground pins The supply current and return current must be distributed as evenly as possible among the pins Current to the drive through the long power pins may be limited by the system to reduce inrush current to the drive during hot plugging 9 5 Signal characteristics This section describes the electrical signal characteristics of the drive s input and output signals See Table 12 for signal type and signal name information 9 5 1 Ready LED Out The Ready LED Out signal is driven by the drive as indicated in Table 13 Table 13 Ready LED Out conditions Normal command activity LED status Ready LED Meaning bit mode page 19h 0 1 Spun down and no activity Off Off Spun down and activity command executing On On Spun up and no activity On Off Spun up and activity command executing Off On Spinning up or down Blinks steadily 50 on and 50 off 0 5 seconds on and off for 0 5 seconds Format in progress each cylinder change Toggles on off Cheetah 15K 4 SAS Product Manual Rev B 61 The Ready LED Out signal is designed to pull down the cathode of an LED The anode is attached to the proper 3 3 volt supply through an appropriate current limiting resistor The LED and the current limiting resis tor are external to the drive See Table 14 for the output c
84. onitoring Analysis and Reporting Technology S M A R T e 5 year warranty 3 5 Formatted capacities Standard OEM models are formatted to 512 bytes per block The block size is selectable at format time and must be a multiple of 4 bytes Users having the necessary equipment may modify the data block size before issuing a format command and obtain different formatted capacities than those listed To provide a stable target capacity environment and at the same time provide users with flexibility if they choose Seagate recommends product planning in one of two modes 1 Seagate designs specify capacity points at certain block 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 generation to generation The current guaranteed operating points for this product are Capacity Blocks ST3146854SS ST373454SS ST336754SS Sector Size Decimal Hex Decimal Hex Decimal Hex 512 286 749 488 11177330 143 374 744 88BB998 71 687 372 445DCCC 514 282 050 768 10CFCODO 141 025 384 867E068 70 512 692 433F034 520 280 790 184 10BC84A8 140 395 092 85E4254 70 197 546 42F212A 522 279 041 740 10A1D6CC 139 463 602 8500BB2 68 914 176 41B8C00 524 275 154 368 106685C0 137 577 184 83342E0 68 766 592 4194B80 2 Seagate drives also may be used at the m
85. ood PRML read channel electronics embedded servo technology and a Serial Attached SCSI SAS interface to provide high performance high capacity data storage for a variety of systems including engineering workstations net work servers mainframes and supercomputers The Serial Attached SCSI interface is designed to meet next generation computing demands for performance scalability flexibility and high density storage reguirements Cheetah drives are random access storage devices designed to support the Serial Attached SCSI Protocol as described in the ANSI specifications this document and the SAS Interface Manual part number 100293071 which describes the general interface characteristics of this drive Cheetah drives are classified as intelligent peripherals and provide level 2 conformance highest level with the ANSI SCSI 1 standard The SAS connec tors cables and electrical interface are compatible with Serial ATA SATA giving future users the choice of populating their systems with either SAS or SATA hard disc drives This allows you to continue to leverage your existing investment in SCSI while gaining a 3Gb s serial data transfer rate The head and disc assembly HDA is sealed at the factory Air recirculates within the HDA through a non replaceable filter to maintain a contamination free HDA environment Note Never disassemble the HDA and do not attempt to service items in the sealed enclosure heads media actuator etc as
86. ower connector 5V 12V 0 to 100 kHz 150mV 150mV 100 kHz to 10 MHz 100mV 100mV 6 2 2 Power seguencing The drive does not reguire power seguencing The drive protects against inadvertent writing during power up and down 6 2 3 Current profiles The 12V and 45V current profiles for ST3146854SS ST373454SS and ST336754SS models are shown below in the following figures Note All times and currents are typical See Tables 2 and 3 for maximum current reguirements Cheetah 15K 4 SAS Product Manual Rev B 27 Figure 2 Typical ST3146854SS drive 12V current profile 3 0 2 5 2 0 Amps 1 5 ka 10 PREN 0 0 0 4 8 12 16 20 24 28 32 Seconds Figure 3 Typical ST3146854SS drive 5V current profile 28 Cheetah 15K 4 SAS Product Manual Rev B Amps 0 2 4 6 8 10 12 14 16 18 20 Seconds Figure 4 Typical ST373454SS drive 12V current profile 30p 25 Amps 1 5 1 0 sam 0 0 0 4 8 12 16 20 24 28 32 Seconds Figure 5 Typical ST373454SS drive 5V current profile Cheetah 15K 4 SAS Product Manual Rev B 29 Amps 0 2 4 6 8 10 12 14 16 18 20 Seconds Figure 6 Typical ST336754SS drive 12V current profile 3 0 25 2 0 Amps 1 5 5 i 1 0 OG hise ia 0 0 k Seconds Figure 7 Typical ST336754SS drive 5V current profile 30 Cheetah 15K 4 SAS Product Manual Rev B 6 3 Power dissipation ST3146854SS in 3 Gbit operation Typical power dis
87. poses of recov ered error specifications Recovered Data error rate is determined using read bits transferred for recoverable errors occurring during a read and using write bits transferred for recoverable errors occurring during a write 5 1 2 Unrecoverable Errors An unrecoverable data error is defined as a failure of the drive to recover data from the media These errors occur due to head media or write problems Unrecoverable data errors are only detected during read opera tions but not caused by the read If an unrecoverable data error is detected a MEDIUM ERROR 03h in the Sense Key will be reported Multiple unrecoverable data errors resulting from the same cause are treated are 1 error Cheetah 15K 4 SAS Product Manual Rev B 17 51 3 Seek errors A seek error is defined as afailure of the drive to position the heads to the addressed track After detecting an initial seek error the drive automatically performs an error recovery process If the error recovery process fails a seek positioning error Error code 15h or 02h will be reported with a Hardware error 04h in the Sense Key Recoverable seek errors are specified at Less than 10 errors in 108 seeks Unrecoverable seek errors Sense Key 04h are classified as drive failures 5 1 4 Interface errors An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the device port connected to the receiver The error may be detecte
88. power cables If you intend the use the drive in a non backplane host system connecting the drive using high guality cables is acceptable as long as the I O cable length does not exceed 4 meters 13 1 feet Slide the carrier or tray into the appropriate bay in your host system using the instructions provided by the host system This connects the drive directly to your system s SAS connector The SAS connector is normally located on a SAS backpanel See Section 9 4 1 for additional information about these connectors Power is supplied through the SAS connector The drive is shipped from the factory low level formatted in 512 byte logical blocks You need to reformat the drive only if you want to select a different logical block size SAS Interface gt i connector Figure 17 Physical interface 8 1 Drive orientation The drive may be mounted in any orientation All drive performance characterizations however have been done with the drive in horizontal discs level and vertical drive on its side orientations which are the two pre ferred mounting orientations Cheetah 15K 4 SAS Product Manual Rev B 41 8 2 Cooling Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding the drive will not exceed temperature conditions specified in Section 6 4 1 Temperature The rack cabinet or drawer environment for the drive must provide heat removal from the electronics and
89. r Cheetah drives implement a temperature warning system which 1 Signals the host if the temperature exceeds 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 which exceeds the threatening temperature value A temperature sensor monitors the drive temperature and issues a warning over the interface when the tem perature exceeds a set threshold The temperature is measured at power up and then at ten minute intervals after power up The thermal monitor system generates a warning code of 01 0B01 when the temperature exceeds the speci fied limit in compliance with the SCSI standard The drive temperature is reported in the FRU code field of mode sense data You can use this information to determine if the warning is due to the temperature exceeding the drive threatening temperature or the user specified temperature This feature is controlled by the Enable Warning EWasc bit and the reporting mechanism is controlled by the Method of Reporting Informational Exceptions field MRIE on the Informational Exceptions Control IEC mode page 1Ch The current algorithm implements two temperature trip points The first trip point is set at 65 which is the maximum temperature limit according to the drive specification The second trip point is user selectable using the Log Select command The reference temperature parameter in the temperature lo
90. rations The drive supports operation of any integer number of segments from 1 to 16 Divide the 7 077 Kbytes in the buffer by the number of segments to get the segment size Default is 3 segments Note The size of each segment is not reported by Mode Sense command page 08h bytes 14 and 15 The value OXFFFF is always reported regardless of the actual size of the segment Sending a size specification using the Mode Select command bytes 14 and 15 does not set up a new segment size lf the STRICT bit in Mode page 00h byte 2 bit 1 is set to one the drive responds as it does for any attempt to change an unchangeable parameter 4 5 1 Caching write data Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to be written to the medium is stored while the drive performs the Write command If read caching is enabled RCD 0 then data written to the medium is retained in the cache to be made avail able for future read cache hits The same buffer space and segmentation is used as set up for read functions The buffer segmentation scheme is set up or changed independently having nothing to do with the state of RCD When a write command is issued if RCD 0 the cache is first checked to see if any logical blocks that are to be written are already stored in the cache from a previous read or write command If there are the respective cache segments are cleared The new data is cached for subseguent Rea
91. rder the following items which are incorporated at the manufacturing facility during production or packaged 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 reguested Single unit shipping pack The drive is normally shipped in bulk packaging to provide maximum protection against transit damage Units shipped individually reguire additional protection as provided by the single unit shipping pack Users planning single unit distribution should specify this option The Cheetah 15K 4 SAS Installation Guide part number 100350602 is usually included with each standard OEM drive shipped but extra copies may be ordered The Safety and Regulatory Agency Specifications part number 75789512 is usually included with each standard OEM drive shipped but extra copies may be ordered 3 9 User installed accessories The following accessories are available All kits may be installed in the field e Single unit shipping pack Cheetah 15K 4 SAS Product Manual Rev B 4 0 Performance characteristics This section provides detailed information concerning performance related characteristics and features of Cheetah drives 41 Internal drive characteristics ST3146854SS ST373454SS ST336754SS Drive capacity 146 8 73 4 36 7 Gbytes formatted rounded off value Read write data heads 8 4 2 Bytes per track 471 916 471 916 471 916 Bytes
92. re 26 Compliance interconnect test load Figure 27 shows the zero length test load 10nF_ 50ohm Txt KH points 10 nF 50 ohm SAS internal connector Figure 27 Zero length test load Figure 28 shows an ISI loss example at 3 0 Gbps S dB Compliance interconnect magnitude response and ISI loss example for 3 0 Gbps ISI loss 10 9 dB Sample compliance interconnect Frequency GHz 0 3 15 3 0 Figure 28 ISI loss example at 3 0 Gbps 70 Cheetah 15K 4 SAS Product Manual Rev B Figure 29 shows an ISI loss example at 1 5 Gbps S 08 Compliance interconnect magnitude response and ISI loss example for 1 5 Gops Sample compliance interconnect Frequency GHz 0 15 0 75 15 Figure 29 ISI loss example at 1 5 Gbps 9 5 2 5 Receiver characteristics The drive receiver is A C coupled The receive network terminates the TxRx connection by a 100 ohm equiva lent impedance as specified in table 20 The receiver operates within a BER of 102 when a SAS signal with valid voltage and timing characteristics is delivered to the compliance point from a 100 ohm source The received SAS signal are considered valid if it meets the voltage and timing limits specified in table 17 Additionally the receiver operates within the BER objective when the signal at a receiving phy has the addi tional sinusoidal jitter present that is specified in table 19 and the common mode signal Vc
93. ressure specifications are referenced to a standard day at 58 7 F 14 8 C Maximum wet bulb temperature is 82 F 28 C 6 4 1 Temperature a Operating With cooling designed to maintain the case temperatures the drive meets all specifications over a 41 F to 131 F 5 C to 55 C drive ambient temperature range with a maximum temperature gradient of 36 F 20 C per hour The enclosure for the drive should be designed such that these temperatures not exceeded Air flow may be needed to achieve these temperature values see Section 8 2 Operation at case tempera tures above these values may adversely affect the drives ability to meet specifications The AFR specification for the drive is based on operating in an environment that ensures that the case tem peratures are not exceeded Occasional excursions to drive ambient temperatures of 131 F 55 C or 41 F 5 C may occur without impact to specified AFR Air flow may be needed to achieve these temperatures Continual or sustained operation at case temperatures above these values may degrade AFR The maxi mum allowable continuous or sustained HDA case temperature for the rated AFR is 122 F 50 C To confirm that the required cooling for the electronics and HDA is provided place the drive in its final mechanical configuration perform random write read operations After the temperatures stabilize measure the case temperature of the drive The maximum allowable HDA case temper
94. rface gt connector Figure 19 Physical interface Cheetah 15K 4 SAS Product Manual Rev B 57 0 80 6X 5 92 7 62 MN IN 0 52 0 08 x 45 0 45 0 03 7X 2 00 X gt STO E 2 42 73 REF p 41 13 0 15 gt 0 2018 0 30 0 05 2 Hl E C A B 1 10 4 0 0 08 i EN 2 OF DATUM D amp lo 1islb a 1 t A t pe an nea 1 A RO 30 0 08 4X 0 30 0 05 4x B U SEE Detai11 33 43 0 05 gt B lt 115 875 15 875 17 14 2 6X a hi He 0 84 0 05 221 0 15 B 4 J 4 90 0 08 0 35MIN v y AM P15 U p1 S1 S7 OF DATUM B Figure 20 SAS connector dimensions 58 Cheetah 15K 4 SAS Product Manual Rev B Detail A ipa BP s8
95. rive primary defects 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 and G lists may be referenced by the initiator using the Read Defect Data command Details of the SCSI commands supported by the drive are described in the SAS Interface Manual Also more information on the drive Error Recovery philosophy is presented in the SAS Interface Manual 7 2 Drive error recovery procedures When an error occurs during drive operation the drive if programmed to do so performs error recovery proce dures to attempt to recover the data The error recovery procedures used depend on the options previously set in the Error Recovery Parameters mode page Error recovery and defect management may involve using sev eral SCSI commands described in the SAS Interface Manual The drive implements selectable error recovery time limits reguired in video applications The error recovery scheme supported by the drive provides a way to control the total error recovery time for the entire command in addition to controlling the recovery level for a single LBA The total amount of
96. s detected by the DST If the field is not set to zero the test failed for the reason reported in the field The drive will report the failure condition and LBA if applicable in the Self test Results Log parameter The Sense key ASC ASCQ and FRU are used to report the failure condition 5 2 6 2 5 Abort There are several ways to abort a diagnostic You can use a SCSI Bus Reset or a Bus Device Reset message to abort the diagnostic You can abort a DST executing in background mode by using the abort code in the DST Function Code field This will cause a 01 self test aborted by the application client code to appear in the self test results values log All other abort mechanisms will be reported as a 02 self test routine was interrupted by a reset condition 5 2 7 Product warranty Beginning on the date of shipment to the customer and continuing for the period specified in your purchase contract Seagate warrants that each product including components and subassemblies that fails to function properly under normal use due to defect in materials or workmanship or due to nonconformance to the applica ble specifications will be repaired or replaced at Seagate s option and at no charge to the customer if returned by customer at customer s expense to Seagate s designated facility in accordance with Seagate s warranty procedure Seagate will pay for transporting the repair or replacement item to the customer For more detailed warranty informati
97. sc drive e Keyboard e Monitor display e Printer External modem e Mouse Although the test system with this Seagate model complies with the directives standards we cannot guarantee that all systems will comply The computer manufacturer or system integrator shall confirm EMC compliance and provide the appropriate marking for their product Electromagnetic compliance for the European Union If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic Compatibility Directive 89 336 EEC of 03 May 1989 as amended 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 Marking it complies with the Australia New Zealand Standard AS NZS3548 1995 and meets the Electromagnetic Compatibility EMC Framework requirements of Australia s Spectrum Man agement Agency SMA Korean MIC If this model has the Korean Ministry of Information and Communication MIC logo it complies with paragraph 1 of Article 11 of the Electromagnetic Compatibility EMC Control Regulation and meets the Electromagnetic Compatibility Framework requirements of the Radio Research Laboratory RRL Ministry of Information and Communication Republic of Korea Taiwanese BSMI If this model has two Chinese words meaning EMC certification followed by an eight digit identification num ber as a Marking it complies with Chinese National Standard CNS
98. shall comply with the impedance reguirements of table 20 for the media from which they are formed An egualizer network if present shall be part of the TxRx connection TxRx connections that are composed entirely of electrically conducting media shall be applied only to homoge nous ground applications e g between devices within an enclosure or rack or between enclosures intercon nected by a common ground return or ground plane 9 5 2 4 1 Transmitter characteristics The drive are D C coupled 68 Cheetah 15K 4 SAS Product Manual Rev B A combination of a zero length test load and the transmitter compliance transfer function TCTF test load methodology is used for the specification of transmitter characteristics This methodology specifies the trans mitter signal at the test points on the reguired test loads The transmitter uses the same settings e g pre emphasis voltage swing with both the zero length test load and the TCTF test load The signal specifications at IR are met under each of these loading conditions The TCTF is the mathematical statement of the transfer function through which the transmitter shall be capable of producing acceptable signals as defined by a receive mask The transmission magnitude response of the TCTF in dB is given by the following eguation for 1 5 Gbps 21 20 x log ole x 6 5 x 10 x 2 0x10 xf 3 3 x 10 for 50 MHz lt f lt 1 5 GHz and for 1 5 GHz lt f lt 5 0 G
99. sipation under idle conditions in 3Gb operation is 14 34 watts 48 93 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vertical axis To calculate BTUs per hour multiply watts by 3 4123 ST3146854SS DC CURRENT POW ER vs THROUGHPUT 3 Gbit Random 8 Block Reads 1800 20 00 A e 5Volt A 8 12 Volt A 1600 EEE ez E it 0 A Watts 16 00 a y We a SS v o g 1200 5 2 z OO o r A eat E tl S dz OVE a NO lt 100 0 800 MM 2222 22 8 00 OOO zost te un Pun a Tun R aa Ja Tan cee Pam on E a 6 00 0 400 7 7 1 7 4 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 350 0 400 0 I Os per Second Figure 8 ST3146854SS 3 Gbit DC current and power vs input output operations per second ST3146854SS in 1 5 Gbit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 14 64 watts 49 96 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 8 Locate the typical I O rate for a drive in your system on the horizontal axis and read the corresponding 5 volt current 12 volt current and total watts on the vert
100. ta in the buffer is a prefetch hit not a cache operation hit To enable Prefetch use Mode Select page 08h byte 12 bit 5 Disable Read Ahead DRA bit DRA bit 0 enables prefetch Since data that is prefetched replaces data already in some buffer segments the host can limit the amount of prefetch data to optimize system performance The Max Prefetch field bytes 8 and 9 limits the amount of prefetch The drive does not use the Prefetch Ceiling field bytes 10 and 11 14 Cheetah 15K 4 SAS Product Manual Rev B During a prefetch operation the drive crosses a cylinder boundary to fetch more data only if Mode parameters page 08h byte 2 bit 4 is set to 1 Discontinuity DISC bit When prefetch read look ahead is enabled enabled by DRA 0 it operates under the control of ARLA Adaptive Read Look Ahead If the host uses software interleave ARLA enables prefetch of contiguous blocks from the disc when it senses that a prefetch hit will likely occur even if two consecutive read operations were not for physically contiguous blocks of data e g software interleave ARLA disables prefetch when it decides that a prefetch hit will not likely occur If the host is not using software interleave and if two sequential read operations are not for contiguous blocks of data ARLA disables prefetch but as long as seguential read operations reguest contiguous blocks of data ARLA keeps prefetch enabled 4 5 3 Optimizing cache performance
101. tal IMIS ss oe Sees NN EA NB hb el id is Ree he 34 6 4 1 Temperature sa nina bav Ben mn UE ban Ea RABU 34 6 4 2 Relative humidity ii 35 6 4 3 Effective altitude sea level 35 6 4 4 Shock and vibration 35 6 4 5 Air cleanliness ccc cee x sn ela u Sate Ml Sears OP TAK 37 6 4 6 Corrosive environment 37 6 4 7 ACOUSTICS a Ab dla A Ee VE BSN 38 6 4 8 Electromagnetic susceptibility 38 6 5 Mechanical specifications 38 7 0 Defect and error management cooocococorcoocooocoocoococococcooococoococo c oc 39 7 1 Drive internal defects etrors 39 7 2 Drive error recovery procedures 39 7 3 SAS system errors aa LAS a dai wae al dad PV Wad DE a alee 40 8 0 InstallatiOh oi been ee an eee Ian NE Na aa Ia 41 8 1 Drive orientation eee 41 8 2 OOOMNJ ja rios Bee DENE Ba A AN O ei E UE AN ane Se Etat ES 42 8 3 Drive mounting ee eee 43 8 4 Groundinig z Aedes sk BIL SA A Z Be EN 43 9 0 Interface reguirements eee eee eee eee eens 45 9 1 SAS AUTOS a Bee ta Ne Ne BN ej oja dull Ug ke Ga Eu 40 45 9 1 1 task management functions
102. ts This section partially describes the interface reguirements as implemented on Cheetah drives Additional infor mation is provided in the SAS Interface Manual part number 100293071 9 1 SAS features This section lists the SAS specific features supported by Cheetah drives 911 task management functions Table 6 lists the SAS task management functions supported Table 6 SAS task management functions supported Task name Supported Abort Task Yes Clear ACA Yes Clear task set Yes Abort task set Yes Logical Unit Reset Yes Query Task Yes 9 1 2 task management responses Table 7 lists the SAS response codes returned for task management functions supported Table 7 Task management response codes Function name Response code Function complete 00 Invalid frame 02 Function not supported 04 Function failed 05 Function succeeded 08 Invalid logical unit 09 Cheetah 15K 4 SAS Product Manual Rev B 45 9 2 Dual port support Cheetah SAS drives have two independent ports These ports may be connected in the same or different SCSI domains Each drive port has a unigue SAS address The two ports run at the same link rate The first port to successfully complete speed negotiation sets the link rate support by both ports When the second port participates in speed negotiation it indicates the only sup ported speed is the speed selected by the first port If the first port to complete spe
103. unction not supported 05 45 Function reject 04 45 task set full status 56 technical support services 73 temperature 34 42 ambient 34 case 34 gradient 34 limits 34 non operating 34 regulation 3 See also cooling terminate task function 45 terminators 41 tracks perinch 11 tracks persurface 11 transmitters 61 transporting the drive 23 U unformatted 9 Unrecoverable Errors 17 unrecovered media data 17 V vibration 35 37 W warranty 23 Z zero latency read 56 82 zone bit recording ZBR 8 Cheetah 15K 4 SAS Product Manual Rev B Seagate Seagate Technology LLC 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 100350601 Rev B Printed in USA
104. used by drive malfunction A S M A R T predictive failure indicates that the drive is deteriorating to an imminent failure and is considered an AFR hit 5 2 2 Preventive maintenance No routine scheduled preventive maintenance is required 5 2 3 Hot plugging the drive When a disc is powered on by switching the power or hot plugged the drive runs a self test before attempting to communicate on its interfaces When the self test completes successfully the drive initiates a Link Reset starting with OOB An attached device should respond to the link reset If the link reset attempt fails or any time the drive looses sync the drive initiated link reset The drive will initiate link reset once per second but alternates between port A and B Therefore each port will attempt a link reset once per 2 seconds assuming both ports are out of sync If the self test fails the does not respond to link reset on the failing port 18 Cheetah 15K 4 SAS Product Manual Rev B Note It is the responsibility of the systems integrator to assure that no temperature energy voltage haz ard or ESD potential hazard is presented during the hot connect disconnect operation Discharge the static electricity from the drive carrier prior to inserting it into the system Caution The drive motor must come to a complete stop prior to changing the plane of operation This time is reguired to insure data integrity 5 2 4 S M A R T S M A R T is an acronym for
105. vides a way for the drive to report its operating parameters to the initiator The drive maintains four sets of mode parameters 1 Default values Default values are hard coded in the drive firmware stored in flash E PROM nonvolatile memory on the drive s PCB These default values can be changed only by downloading a complete set of new firmware into the flash E PROM An initiator can reguest and receive from the drive a list of default values and use those in a Mode Select command to set up new current and saved values where the values are change able Saved values Saved values are stored on the drive s media using a Mode Select command Only parameter values that are allowed to be changed can be changed by this method Parameters in the saved values list that are not changeable by the Mode Select command get their values from default values storage When power is applied to the drive it takes saved values from the media and stores them as current val ues in volatile memory It is not possible to change the current values or the saved values with a Mode Cheetah 15K 4 SAS Product Manual Rev B 51 Select command before the drive achieves operating speed and is ready An attempt to do so results in a Check Condition status On drives reguiring unigue saved values the reguired unigue saved values are stored into the saved val ues storage location on the media prior to shipping the drive Some drives may have unigue firmware
106. y procedure 12 Cheetah 15K 4 SAS Product Manual Rev B If the drive receives a START STOP UNIT command with the START bit and IMMED bit egual to 1 and does not receive a NOTIFY ENABLE SPINUP primitive within 5 seconds the drive fails the START STOP UNIT command The START STOP UNIT command may be used to command the drive to stop the spindle Stop time is 30 sec onds maximum from removal of DC power There is no power control switch on the drive 4 4 Prefetch multi segmented cache control The drive provides a prefetch read look ahead and multi segmented cache control algorithms that in many cases can enhance system performance Cache refers to the drive buffer storage space when it is used in cache operations To select this feature the host sends the Mode Select command with the proper values in the applicable bytes in page 08h Prefetch and cache operations are independent features from the standpoint that each is enabled and disabled independently using the Mode Select command however in actual opera tion the prefetch feature overlaps cache operation somewhat as described in sections 4 5 1 and 4 5 2 All default cache and prefetch mode parameter values Mode Page 08h for standard OEM versions of this drive family are given in Table 9 3 2 1 4 5 Cache operation Note Refertothe SAS Interface Manual for more detail concerning the cache bits Of the 8 192 kbytes physical buffer space in the drive approximately 7 077 kbytes c

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