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Seagate Cheetah T10 SAS, 300GB

1. 500 4 0 15B 4 90 0 08 0 35MIN y PIs gt Sl S7 OF DATUM B Figure 17 SAS connector dimensions 58 Cheetah T10 SAS Product Manual Rev A Detail A S8 pa 0 05 x 45 5X t 2 25 0 05 E A 0 40 0 05 X 45 3X 4 85 0 05 0 10 B CORING ALLOWED IN THIS AREA lt 4 40 0 15 SEE Detail 2 RO 30 0 08 A 1 95 0 08 A 0435 E 0 05 lt bd De SECTION C C SECTION A A CONTACT SURFACE FLUSH 7 0 08 0 05 TO DATUM A 0 03 r 65 x 1 90 0 08 1 23 0 05 4 t TN Detail 2 0 08 0 05 2 40 0 007 7 Figure 18 SAS connector dimensions SECTION B B 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 17 and 18 Cheetah T10 SAS Product Manual Rev A 59 9 4 4 Electrical description
2. 1 000 to 40 000 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 within this document are specified with the drive mounted by any of the four methods shown in Figure 12 and in accordance with the restrictions of Section 8 3 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 60 Gs at a maximum duration of 2 msec half sinewave Shock may be applied in the X Y or Z axis Operating abnormal Equipment 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
3. 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 shall 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 120 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 T10 SAS Product Manual Rev A 33 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 1bs 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 70
4. 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 anytime anywhere in the world spp seagate com spp 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 ben efits or to register go to spp seagate com any time from anywhere in the world 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 product availability and compatibility Technical Support Seagate technical support is available to assist you online at support seagate com or through one of our call centers Have your system configuration informa
5. oococooo eee teens 37 7 3 SAS SYSTEM Shot Dea ea na te ow ae O o ba ple Er es ae 39 7 4 Background Media Scan ee ii 39 7 5 Media Pre CAN ee ET S EE 39 7 6 Deferred Auto Reallocation Le 40 7 7 Idle Read After Write 0 ee eee ee eee eens 40 INSTANAUON ns sana ace Daa NE ca z ans ei de ea ha o sa ep a Saat Sa ln cor e Ia a 41 8 1 DAVE OHNA a vs ca eA on eh ee mae SN Se ee tote Kale Va hehe a whee 41 8 2 CO OIA aa ao aa aa rn e ere rae 42 8 3 DAVE MOM Ga dank bo dais dio dd de o r neta ko Gr nee Ha one anton din lo o dase de dk 43 8 4 GOUNG ssa SA ho a NU A ENANA oe et k ee asin 43 Interface FeqUIFEMENTES en VETA A AA VDO 45 9 1 SAC ASS a E a Ae o En na AS 45 9 1 1 task management functions 45 9 1 2 task management responses 45 9 2 lal POM supports Go Maas owe pee a ie diki AGM dov 46 9 3 SCSI commands supported 47 9 3 1 GUY as acta deca shits aa Stoke a SR Wee Bi are a ete a 51 9 3 2 Mode Sense data inn 51 9 4 Miscellaneous operating features and conditions 56 9 4 1 SAS physical interface 0 ee eens 57 9 4 2 Physical characteristics iii ti L a KEKE EU 59 9 4 3 Connector reguirements eee eens 59 9 4 4 BleciicaldescripllOns casaca a hee ni 60 9 4 5 FINDE SCHAPIOAS rusas o oia in cd ER A A O AVTA 60 9 4 6 SAS t
6. 00 00 00 00 00 00 00 00 00 00 00 DEF SP Da 00 D EE OO 00 BO U JU CER EE CHG 8 1 Va BE Ef 00 VO 00 00 VY OO TE TE DEE 0012 LA VO EE TE 0L AU LE EE tk TE 80 U AU BU 00 OO Or gO CHG Se lz a5 00 90 JU LE EL LE LE AU VY ZU VO LO JU BU OO VO DO DEE Sa Va 02 00 00 00 GO LO AD 00 07 95 CHG ca Va 03 0 00 JO 09 JOY LL DO 00 90 DEE 8 Ue 06 00 0 01 JO 1010 GO CHG 18 06 00 00 100 00 00 JU DEP 99 OG OG MO OT tao GO 00 CHG 9 06 AO OO Be Te tr EE DEF 9a 0a 00 02 00 00 00 05 00 00 00 04 CHG 9a Da OV Vo Ef TE E EE 00 00 00 AU DEE JO VAL 0 0 0 0 00 OO OO 0005 000 200 UL Cag 30 Ue Ja UE LE E bt 11 AE ET LE E DEF de VI 00 gt Ue al OL OU Ls 00 Le 100 UJO VO VO VY CHG GG OW 0 De 01 OU TE EE TE ZE OMO 100 doz Or JO DEP bo Da BU 00 00 AU BO UV OU 000000 1010 CHG 199 Da LY DS 00 00 00 00 00 BO 00 00 DEFY ba Va LY 95 UL LY VI 00 90 Va 00 VY CHG ba Da OO TEUS EE EL bt OG br 00 QU DEF 8006 0080 NE 01900 JA CHG Sb UG Or EU AJE UB 80 10 54 Cheetah T10 SAS Product Manual Rev A Table 12 MODE DATA HEADER 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR US OD DS DS OD VO OZ 000 MODE DEF CHG DEF CHG DEF CHG DEF CHG DEF CHG DEF CHG DEF CHG DEE CHG DEF CHG DEF CHG DEF CHG DEF CHG DEE CHG DEF CHG Cheetah T10 SAS Product Manual Rev A PAGES 81 81 82 8
7. 014 sjey _ 2X2845 2X 1 120 2X 70 05 2X 2 758 aa 122 00 4 803 2X 130 05 2X 5 120 146 99 MAX 5 787 MAX 131 17 5 164 4X 6 32UNC 2B 85 60 3 370 Y 4 57 MIN BLIND 18 MIN BLIND 41 15 1 620 NZ 4 22 X 90 166 X 90 0 36 2X 29 21 ESA 2 pp Les FA va BR 1 45 057 3 17 125 DRIVE CENTER LINE 20 68 814 1 nimi LN NJI 18 bp 3 50 38 138 015 Figure 13 36 0 13 005 X 0 13 1 005 Z 0 25 Physical dimensions CONNECTOR TAB CENTERLINE Cheetah T10 SAS Product Manual Rev A 7 0 Defect and error management Seagate continues to use innovative technologies to manage defects and errors These technologies are designed to increase data integrity perform drive self maintenance and validate proper drive operation SCSI defect and error management involves drive internal defect error management and SAS system error considerations errors in communications between the initiator and the drive In addition Seagate provides the following technologies used to increase data integrity and drive reliability e Background Media Scan see Section 7 4 e Media Pre Scan see Section 7 5 e Deferred Auto Reallocation see Section 7 6 e Idl
8. Block Reads 1 400 14 00 e 5Volt A m 2 Volt A 1200 2 00 4 Watts 1000 10 00 Y o 2 0 800 8 00 2 lt 0 600 6 00 E 0 400 4 00 0 200 2 00 0 000 0 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 Os per Second Figure 8 ST3146755SS 1 5 Gbit DC current and power vs input output operations per second 30 Cheetah T10 SAS Product Manual Rev A ST373355SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 9 13 watts 31 15 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 5 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 CURRENT POWER vs THROUGHPUT SAS 3 0GB Random 8 Block Reads 1 400 4 00 5Volt A E 2 Volt A 1200 12 00 4 Watts 1000 Pa E M T O p 0800 AA AAA lt A 8 00 5 a 9600 A TO 6 00 E 0 400 4 00 0 200 2 00 0 000 0 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 Os per Second Figure 9 ST373355SS 3 Gbit DC current and power vs input output operations per second ST373355SS in 1 5 Gbit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 9 18 watts 31 32 BTUs per hour To obtain operating power for typical ran
9. Call center Americas Toll free 1 877 271 3285 Toll free 1 800 SEAGATE Customer Service 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 Hours of operation are 8 00 A M to 7 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 8Hours of operation are 8 00 A M to 5 00 P M Monday through Friday Central time 4Authorized Service Center Toll free 1 800 468 3472 Toll free 1 800 475 01435 Direct dial 1 405 324 4730 Direct dial 1 405 324 4700 Direct dial 59 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 8 00 P M Monday through Friday and 9 00 A M to 5 00 P M Saturday Eastern time 74 Cheetah T10 SAS Product Manual Rev A 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 Fr
10. DAR during read oper ations performed by the drive When a write command is received for an LBA marked for DAR the auto reallo cation process is invoked and attempts to rewrite the data to the original location If a verification of this rewrite fails the sector is re mapped to a spare location This is in contrast to the system having to use the Reassign Command to reassign a location that was unread able and then generate a write command to rewrite the data DAR is most effective when AWRE and ARRE are enabled this is the default setting from the Seagate factory With AWRE and ARRE disabled DAR is unable to reallocate the failing location and will report an error sense code indicating that a write command is being attempted to a previously failing location 7 7 Idle Read After Write Idle Read After Write IRAW utilizes idle time to verify the integrity of recently written data During idle periods no active system requests the drive reads recently written data from the media and compares it to valid write command data resident in the drives data buffer Any sectors that fail the comparison result in the invocation of a rewrite and auto reallocation process The process attempts to rewrite the data to the original location If a verification of this rewrite fails the sector is re mapped to a spare location 40 Cheetah T10 SAS Product Manual Rev A 8 0 Installation Cheetah disc drive installation is a plug and play process There are
11. 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 unique 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 speed 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 e 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 T10 SAS Product Manual Rev A 9 3 SCSI commands supported Table 8 lists the SCSI commands supported by Cheetah drives Table 8 Commands supported by Cheetah T10 SAS family drives Command name Command code Supported Change Definition 40h Compare 39h Copy 18h MD zz lt lt z lt lt zz Z lt lt Z lt I lt Z K Pi Z lt IZ lt z Z Z Z Copy and Verify A Format Unit 1 DPRY bit supported DCRT bit supported STP
12. Manual Rev A 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 Section 9 3 2 4 5 Cache operation Note Refer to the SAS Interface Manual for more detail concerning the cache bits Of the 16 Mbytes physical buffer space in the drive approximately 13 000 kbytes can be used as a cache The buffer is divided into logical segments 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
13. Pre Scan is a feature that allows the drive to repair media errors that would otherwise have been found by the host system during critical data accesses early in the drive s life The default setting for Media Pre Scan is enabled on standard products Media Pre Scan checks each write command to determine if the destination LBAs have been scanned by BMS If the LBAs have been verified the drive proceeds with the normal write command If the LBAs have not been verified by BMS Pre Scan will convert the write to a write verify to certify that the data was properly written to the disc Note During Pre Scan write verify commands write performance may decrease by 50 until Pre Scan completes Write performance testing should be performed after Pre Scan is complete This may be checked by reading the BMS status To expedite the scan of the full pack and subsequently exit from the Pre Scan period BMS will begin scanning immediately when the drive goes to idle during the Pre Scan period In the event that the drive is in a high transaction traffic environment and is unable to complete a BMS scan within 24 power on hours BMS will dis able Pre Scan to restore full performance to the system Cheetah T10 SAS Product Manual Rev A 39 7 6 Deferred Auto Reallocation Deferred Auto Reallocation DAR simplifies reallocation algorithms at the system level by allowing the drive to reallocate unreadable locations on a subsequent write command Sites are marked for
14. Product Manual Rev A 19 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 It is the responsibility of the host application to determine the not ready cause While not technically part of DST a Not Ready condition also qualifies 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 e Motor will not spin Motor will not lock to speed e Servo will not lock on track e 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
15. 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 accomplish this issue a Log Sense command to log page Ox3E 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 2 milliseconds 163 milliseconds Cheetah T10 SAS Product Manual Rev A 17 Reporting
16. SAS Product Manual Rev A Cheetah T10 SAS Product Manual Rev A 3 0 General description Cheetah drives combine giant magnetoresistive GMR heads partial response maximum likelihood 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 requirements 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 replace
17. SAS drives use the device connector for e DC power e 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 15 SAS pin descriptions CHE TI Signals Pin Signainame Sign ype r Toro O CAC OOO es roam A CA s emaom er come es oom lO rr es come sr ronca di or sao se rota reise ese se onem em oom pora Z fre oom Short pin to support hot plugging NC No connection in the drive 60 Cheetah T10 SAS Product Manual Rev A 9 4 6 SAS transmitters and receivers A typical SAS differential copper transmitter and receiver pair is shown in Figure 19 The receiver is AC cou pling to eliminate ground shift noise Th O APA ee 01 Differential Transmitter E Transfer Medium 100 Receiver 3100 TY CT TT TT TT 01 RY Figure 19 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 among the pins Three 5 volt pins provide
18. 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 technical 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 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 5 00 P M Monday through Friday Warranty service for Australia is available from 10 00 A M to 7 00 P M April through October and from 11 00 A M to 8 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 86 10 6225 5336 Hong Kong 3800 90 04 74 Hong Kong Cantonese 001 800 0830 1730 India 4 1 800 180 1104 Ind
19. are acceptable as long as the temperature measurement guide lines of Section 6 4 1 are met it Note Air flows in the direction shown back to front Under uni or in reverse direction front to back Above unit Ng s Under unit s Note Air flows in the direction shown or a in reverse direction side to side Figure 15 Air flow 42 Cheetah T10 SAS Product Manual Rev A 8 3 Drive mounting Mount the drive using the bottom or side mounting holes If you mount the drive using the bottom holes ensure that 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
20. bit in the SAS Interface Manual data requested 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 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 requested 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 All data transfers to the host are in accordance with 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 all of the requested logical blocks are already in the cache 1 Drive transfers the requested logical blocks to the initiator Case B A Read command requests data and at least one requested logical block is not in any segment of the cache 1 The drive fetches the requested 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 O2h 2 Ifthe prefetch feature is enabled refer to section 4 5 2 for operation from this point Each cache segment is actually a self con
21. bytes 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 system ability to support the rates listed and no cable loss 4 3 Start 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 equal 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 equal to O before receiving a NOTIFY ENABLE SPINUP primitive the drive waits for a START STOP UNIT command with the START bit equal to 1 After receiving a START STOP UNIT command with the START bit equal 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 recovery procedure If the drive receives a START STOP UNIT command with the START bit and IMMED bit equal to 1 and does not receive a NOTIFY ENABLE SPINUP primitive within 5 seconds the drive fails the START STOP UNIT command 12 Cheetah T10 SAS Product
22. 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 track 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 f
23. current and power vs input output operations per second 31 ST3733555S 1 5 Gbit DC current and power vs input output operations per second 31 Location of the HDA temperature check point na 32 Recommended mounting Ma 20 RA ea ane add a ak bes TO AD Ooh Ses ESR ESET M ee se 34 Pnysica kd MehSIONS LA do Ka ak a Bis el A ae ew hoe eee 36 Pnysical leo so s ra id ea RENA y s l tebar Ber ata ar ate b kn 5 41 Aa O el O ena A O EI EO ana 42 Pnysical MONACO nitro 5 57 SAS COMNECIOr diMmenslONS erae tera td da ALA adas 58 SAS CONNEC AMON STO NI E ti A ia io o 59 SAS Transmiter and OCEIVElS estas DA A A SI Be e 61 RECEIVE evye NA Kua o EE E a Se Se ee ee a ca aes da Ed 63 Reveive tolerance eye MaSk 6 0 eee eee eee teen eee eens 63 Sinusoidal jiter Mask airoso rra aa owed Aneta suede Satna ae eee 64 Compliance interconnect test load na 69 zero lengih testi o a a A CR hes A BRO e 70 lol loss example di DO ODP ta A e ve eee 70 Sh loss example at GODE a 225 004 o is id AAA o A A 70 Cheetah T10 SAS Product Manual Rev A 1 Cheetah T10 SAS Product Manual Rev A 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 Cheetah T10 and oth
24. depending on sparing scheme and sector size requested Single unit shipping pack The drive is normally shipped in bulk packaging to provide maximum protection against transit damage Units shipped individually require additional protection as provided by the single unit shipping pack Users planning single unit distribution should specify this option The Cheetah T10 SAS Installation Guide part number 100433695 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 accessory is available e Single unit shipping pack 10 Cheetah T10 SAS Product Manual Rev A 4 0 Performance characteristics This section provides detailed information concerning performance related characteristics and features of Cheetah drives 4 1 Internal drive characteristics ST3300555SS ST3146755SS ST373355SS Drive capacity 300 0 146 8 73 4 Gbytes formatted rounded off value Read write data heads 8 4 2 Tracks per surface total 74 340 74 340 74 340 Tracks user accessible Tracks per inch 125 000 125 000 125 000 TPI Peak bits per inch 890k 890k 890k KBPI Areal Density 110 110 110 Gbits inch Internal data rate 960 to 1607 960 to 1607 960 to 1607 Mbits sec variable with zone Disc rotation speed 15k 15k 15k r
25. 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 T10 SAS Product Manual Rev A 43 44 Cheetah T10 SAS Product Manual Rev A 9 0 Interface reguirements This section partially describes the interface requirements 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 9 1 1 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 T10 SAS Product Manual Rev A 45 9 2
26. 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 coefficient 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 c receiver termination time constant RO RR where RO
27. 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 21 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in table 21 X1 op is half the value for total jitter intable 21 and X17 is half the value for total jitter in table 22 for jitter frequencies above bit rate 1 667 Absolute am plitude in V additional sinusoidal jitter 2 2 Zl pp Z1 TOL OV Outline of eye mask before adding Z toL sinusoidal jitter Z1 OP 2 Outline of eye mask after adding z sinusoidal jitter 0 Xp 1 1X15 XTToL 1 Xtrot Normalized time in UI Figure 21 Reveive tolerance eye mask Cheetah T10 SAS Product Manual Rev A 63 The leading and trailing edge slopes of figure 20 shall be preserved As a result the amplitude value of Z1 is less than that given in table 20 and 2176 and Z19p shall be defined from those slopes by the following equa tion X2op 0 5 xadditional sinusoidal jitter X1 op Z1 I TOL OP Xe ope X1 ne where Z17o1 is the value for Z1 to be used for the tolerance masks and Z1op Xlop and X2op are the values in table 20 for Z1 X1 and X2 The X1 points in the receive tolerance masks are greater than the X1 points in the receive masks due to the addition of sinusoidal jitter Figure 22 defines the sinusoidal jitter mask Peak to peak Sedi sinusoidalA S
28. 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 T10 SAS Product Manual Rev A Table 10 ST3300555SS Mode Sense data MODE DATA HEADER OS ta POLO 00 00 00 08 BLOCK DESCRLR TOR VA ee D SE 00 00 OA 000 MODE PAGES DEE tol Wer 00 05 set OO S00 O JO 000 CHG eL Va EE ET 00 00 OO OV TE 00 DEE 92 06 90 110 JO DO O 1000 OO 00 CHG 82 0 00 LE BU BO VO 00 00 JA DER 895 16 69 SS OU 00 00 58 00 00 CHG 39 5 140 JO 10 01 00 100 EE EE VO 0 0 DEF 84 1601 22 64 Vo 00 00 100100 CHG 84 16 00 00 00 00 00 00 00 00 DEP 107 Va 00 Ob EE UW 000 07 000 00 CHG 87 Oa OF ET PO 00 00 00 0009 DEE Bo Le LA 00 PE Et OU 00 EL BE CHG oe 12 ao 00 U DO Er EL EE Le DEF 8a Va 02 00 00 BU 00 00 00 00 CHG 84 Va 03 LO VO LO 00 00 07 BU LY DEF 406 06 0 90 90 VY 000 JA CHG 18 06 00 00 00 00 00 00 DEF 99 06 06 00 07 JU JU JY CHG 199 006 TO 0U EL EE EE TE DEF Ya 0a 00 02 00 00 00 05 00 00 CHG Ya Va VO US Er EE Ef fi 00 00 DEF 230 Da 1000 DO 00 BO BB LO 00 CHG JE VA Od Of Bi ED DE LE SEE AE DES de OL 00 de UL OL 2010 140 1010 Ls CAS do OL VY Ve 01 OL TE EL EL TE DEP by Da 0000 00 BY 1010 BO 00 GO CHG 69 Ga DU US LU BO 00 BL 00 JA DE
29. to peak measurements and apply at the drive power connector 5V 12V O to 100 kHz 150mV 150mV 100 kHz to 10 MHz 100mV 100mV 6 2 2 Power sequencing The drive does not require power sequencing The drive protects against inadvertent writing during power up and down 6 2 3 Current profiles The 12V and 5V current profiles for these drive are shown below in the following figures Note All times and currents are typical See Tables 2 3 and 4 for maximum current requirements Cheetah T10 SAS Product Manual Rev A 25 Figure 2 26 30 11 20 15 Typical ST3300555SS drive current profiles AAA us zreti zaulie nu Cheetah T10 SAS Product Manual Rev A Figure 3 Typical ST3146755SS drive current profiles Cheetah T10 SAS Product Manual Rev A 27 30 25 20 i z ia 2 lb soale ai e aa zor od e 2 ai ik Se jE PE A A A nz 1 0 ak En o 1 dem Figure 4 Typical ST373355SS drive current profiles 28 Cheetah T10 SAS Product Manual Rev A 6 3 Power dissipation ST3300555SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 14 22 watts 48 52 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 5 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 th
30. 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 information 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 required 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 purch
31. 0 cu cm 0 20 Ib Oto 9 1 kg 48 in 1219 mm gt 1800 cu in gt 19 700 cu cm 0 20 Ib Oto 9 1 kg 42 in 1067 mm gt 600 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 equivalent Figure 12 Recommended mounting 34 Cheetah T10 SAS Product Manual Rev A 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 10 500 Hz 0 5 G zero to peak Vibration may be applied in the X Y or Z axis Operating normal translational random flat profile 10 500 Hz 0 4 gRMS b Operating abnormal 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 10 500 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 10 500 Hz 1 2 gRMS c Non operating The limit
32. 2 59 83 34 34 S A 81 88 88 8a 8a 18 18 99 29 9a 9a 9c 9c b9 bg 80 80 ST373355SS Mode Sense data Da Da De De 16 16 16 16 Da Da 12 12 Da Da 06 06 06 06 Da Da Da 0a Da Da Da Da 06 06 co Pd 00 00 la 00 01 00 00 Ot LA a5 02 03 06 00 06 10 00 00 TO 3d 00 00 00 00 00 low Ob FE 00 00 16 00 22 00 Ob EE 00 00 00 10 00 00 00 00 02 03 00 Of 00 08 05 fl 80 co TE 00 00 00 00 00 64 00 ff 00 rt 00 00 00 00 00 07 Et 00 LE 00 be 00 00 Oa g3 UE Of 00 00 00 00 00 00 OZ 00 00 00 EE 00 00 00 00 00 d0 EE 00 EJE 00 Ef 00 00 19 ff 00 00 00 00 00 00 00 Er 00 00 00 00 00 EE 00 00 00 00 00 EE 00 LE 00 FE 00 00 01 EE 00 00 00 00 00 00 0e TI 00 00 00 00 00 LE 00 00 00 00 00 KE 05 EE 00 ff 00 00 00 ff 00 00 05 LE 00 00 00 00 00 00 00 00 E EE 00 00 00 00 00 ff 00 00 00 06 00 00 00 00 00 00 00 00 00 00 ff E 00 00 00 00 00 ff 00 00 Oa LE TE 01 THE 03 00 00 00 EE LE E 00 93 00 00 00 00 Er 00 00 00 00 EE ET 3a EE db 00 00 00 P
33. 5 reliability and service 16 repair and return information 21 reporting actual retry count 56 reservation conflict status 56 resonance 33 return information 21 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 16 rate 15 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 17 Serial Attached SCSI SAS Interface Manual 1 shielding 3 shipping 21 shipping container 32 shock 33 and vibration 33 shock mount 43 signal characteristics 61 single unit shipping pack kit 10 SMART 9 17 SMP 1 in Mode Select command 56 spindle brake 8 standards 3 start stop time 12 Sulfur 35 support services 73 19 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 Function not supported 05 45 Function reject 04 45 task set full status 56 technical support services 73 temperature 32 42 limits 32 non operating 32 regulation 3 See also cooling terminate task function 45 terminators 41 tracks per inch 11 tracks per surface 11 trans
34. 9 ST3146755SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 10 74 watts 36 65 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 5 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 CURRENT POWER vs THROUGHPUT SAS 3 0GB Random 8 Block Reads 1 400 4 00 e 5Volt A m Volt A 1200 12 00 4 Watts 1000 10 00 y o o 0 800 8 00 3 Z 0600 6 00 E 0 400 4 00 0 200 2 00 0 000 0 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 Os per Second Figure 7 ST3146755SS 3 Gbit DC current and power vs input output operations per second ST3146755SS in 1 5 Gbit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 10 84 watts 36 99 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 5 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 CURRENT POWER vs THROUGHPUT SAS 1 5GB Random 8
35. E Tt ff 00 ed 00 04 00 01 KU 00 00 00 00 00 00 02 00 00 00 80 20 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 e6 00 00 00 00 00 03 00 00 00 00 00 02 00 00 00 00 00 40 00 3a 00 00 00 a 00 00 00 00 00 00 00 00 00 55 9 4 Miscellaneous operating features and conditions Table 13 lists various features and conditions A Y in the support column indicates the feature or condition is supported An N in the support column indicates the feature or condition is not supported Table 13 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 AZS RINK RZN Z SMP 1 in Mode Select command needed to save RPL and rotational offset bytes Table 14 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 Z Z lt lt lt lt lt lt l
36. E PROM An initiator can request 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 2 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 T10 SAS Product Manual Rev A 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 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 identif
37. 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 10 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 detected 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 Mean time between failure MTBF The production disc drive shall achieve a MTBF of 1 400 000 hours 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 specification limits of the operating environment will not affect MIBF performance Continual or sustained operation at case temperatures above the values shown in Section 6 4 1 may degrade product reliability The MTBF target is specified as device power on hours POH for all drives in service per failure MTBF Estimate power on operating hours in the period Number of
38. F ba Da 0005 VL LU LL BO 90 Oa CHG De Da OO EL US EE IL Er UG dE DEB 30 06 00 16 0 Ot 90 00 00 CHG 80 060 DF e0 LE JU 00 00 Cheetah T10 SAS Product Manual Rev A EE PE 01 EE 03 00 00 00 PE LE TE 00 Of 00 00 00 00 Er 00 00 00 00 00 00 ET ET 3a BE db 00 00 00 LI EE ff 00 Oc 00 04 00 01 LE 00 00 00 00 00 00 00 00 02 00 00 00 80 20 00 00 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 OO VY LO GU 00 00 00 00 00 00 e6 00 00 00 00 00 03 00 00 00 00 00 02 00 00 00 00 00 40 00 3a 00 00 00 a 00 00 00 00 00 00 00 00 00 Table11 ST3146755SS Mode Sense data MODE DATA HEADER US ta 00 LO BU OO BO Us BLOCK DESCRIPTOR LE 17 78 30 00 00 02 00 MODE PAGES DEE col Va cv Obe TE OR 100 00 OS U EE EE CHG SL 0a EE EE OU OU VA 100 TEE AO GEL LE DEP 82 Ue VO 00 VY 00 VO JU BL OO OL Sa 10000 BY JO CHG 82 08 00 00 BO JO VU VY VW VV FE TE 0000 00 VY DEF 83 16 34 2c 00 00 00 1c 00 00 03 db 02 00 00 01 00 ee 03 02 40 00 00 00 CHG 85 16500 VO AU JO LE FE 003005001 1005 100 00 LU GOME AO VU 30101 QO OOF 00 00 DEF 84 16 01 22 64 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3a a7 00 00 CHG 84 16 00 00 00 00 00 00 00 00 00 00 00
39. F bit supported IP bit supported DSP bit supported IMMED bit supported VS vendor specific N Inquiry 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 D Q 2 Log Select PCR bit DU bit DS bit TSD bit ETC bit TMC bit LP bit Log Sense A U gt A gt Application Client Log page OFh Buffer Over run Under run page 01h Cache Statistics page 37h Factory Log page 3Eh Last n Deferred Errors or Asynchronous Events page OBh Last n Error Events page 07h Cheetah T10 SAS Product Manual Rev A Table 8 Commands supported by Cheetah T10 SAS family drives continued Command name 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 Background Medium Scan page 15h Start stop Cycle Counter page OEh Temperature page ODh Verify Error Counter page 05h Write error counter page 02h Mode Select same pages as Mode Sense 1Ah Mode Select 10 same pages as Mode Sense 1Ah Mode Sense Caching Parameters page 08h Control Mode page 0Ah Disconnect Reconnect 02h Error Recovery page 01h Format page 03h Information Exceptions Control page 1Ch Background Medium Scan mode subpage 01h Notch and Partit
40. Function Code field is set to the same value as sent in the DST command 20 Cheetah T10 SAS Product Manual Rev A 2 The Self Test Results Value field is setto 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 If the field is set to zero the drive passed with no errors 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
41. Product Manual Cheetah T10 SAS ST330055555 ST3146755SS S137335555 Seagate 2006 Seagate Technology LLC All rights reserved Publication number 100433694 A October 2006 Seagate Seagate Technology and the Seagate logo are registered trademarks of Seagate Technology LLC SeaTools SeaFONE SeaBOARD and Seal DD are either registered trade marks or trademarks of Seagate Technology LLC Other product names are registered trade marks 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 Technol ogy LLC 1 0 2 0 3 0 4 0 5 0 6 0 Contents SCODE vv un anda alero lo Ra aU da Bea lol AN AAA laa Bea BAB BUS BARA ah davok 1 Standards compliance and reference documents 3 2 1 152 16 6 2 6 ee PR RN 3 2 1 1 Electromagnetic compatibility 3 2 2 COMPIE eres ds Sede tine a ae ne ten Ao ena EE 4 2 2 1 Electromagnetic compliance 4 2 3 Reference DOCUMENTS 5 General QESTIO ia iaa bn erat Dee em E DAR tel eta CA tele a 7 3 1 Standard ie atestado ida jale 8 3 2 Media descrip s kada ska A RED RN RR bee ce ede ord 8 3 3 Pe normandS mitad ant bd th bani maan ada its iii dvd oth dida o 8 3 4 elabora pao A O A I a Oo 9 3 5 Formatted Capacities e sa
42. 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 shall comply with the impedance reguiremenis of table 23 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 is D C coupled 68 Cheetah T10 SAS Product Manual Rev A 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 characteristic
43. able 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 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 O 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 T10 SAS Product Manual Rev A 7 3 1 Standard features Cheetah drives have the following standard features e 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 downl
44. ache operation is disabled Though the prefetch operation uses the buffer as a cache finding the requested data 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 The drive does not use the Max Prefetch field bytes 8 and 9 or the Prefetch Ceiling field bytes 10 and 11 When prefetch read look ahead is enabled enabled by DRA 0 the drive enables prefetch of contiguous blocks from the disc when it senses that a prefetch hit will likely occur The drive disables prefetch when it decides that a prefetch hit is not likely to occur 14 Cheetah T10 SAS Product Manual Rev A 5 0 Reliability specifications The following reliability specifications assume correct host and drive operational interface including all inter face timings power supply voltages environmental requirements and drive mounting constraints Seek error rate Less than 10 errors in 10 seeks Read Error Rates Recovered Data Less than 10 errors in 1012 bits transferred OEM default settings Unrecovered Data Less than 1 sector in 10 5 bits transferred Miscorrected Data Less than 1 sector in 10 bits transferred Interface error rate Less than 1 error in 10 bits transferred MTBF 1 400 000 hours Preventive maintenance None required 1 Error rate specified with automatic retries and data correction with ECC enabled and all flaws re
45. ailures 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 monitor 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
46. al Rev A 23 Table 3 ST3146755SS DC power reguirements ST3146755SS ST3146755SS 1 5 Gbit mode 3 Gbit mode Voltage ma 5V 12V 2 5V 12V 2 Regulation 5 5 2 5 5 2 Avg idle current DCX 0 80 0 57 0 78 0 57 Maximum starting current peak DC DC 30 3 0 87 2 12 0 87 1 93 peak AC AC 30 3 1 20 3 49 1 21 3 45 Delayed motor start max DC 30 1 4 0 64 0 03 0 68 0 03 Peak operating current Typical DCX 1 0 78 0 76 0 81 0 76 Maximum DC 30 1 0 78 0 78 0 82 0 78 Maximum peak DC 30 1 60 2 54 1 62 2 62 0 15A DC and 0 2A AC 12V max start current margin added Table 4 ST373355SS DC power requirements 1 5 Gbit mode 3 Gbit mode Voltage 5V 5V 12V 2 Regulation 5 5 5 2 5 5 2 Avg idle current DCX 0 78 0 44 0 77 0 44 Maximum starting current peak DC DC 30 3 0 84 1 91 0 84 1 91 peak AC AC 30 3 1 18 3 17 1 12 3 23 Delayed motor start max DC 30 0 03 0 03 Peak operating current Typical DCX 1 0 75 0 64 0 78 0 63 Maximum DC 30 1 0 77 0 65 0 80 0 66 Maximum peak DC 30 1 50 2 32 1 54 2 32 0 15A DC and 0 2A AC 12V max start current margin added 1 Measured with average reading DC ammeter or equivalent sampling scope Instantaneous 12V current peaks will exceed these values Power supply at nominal voltage N number of drives tested 6 35 24 Cheetah T10 SAS Product Manual Rev A 2 S 4 5 6 Degrees C ambient For 12 V a 10 tolerance is a
47. allocated 5 1 Error rates The error rates stated in this manual assume the following e The drive is operated per this specification using DC power as defined in this manual see Section 6 2 e Errors caused by host system failures are excluded from error rate computations e 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 require user intervention Recoverable Data errors will use correction although ECC on the fly is not considered for purposes 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 Unrecoverable Data Errors Sense Key 03h are specified at less than 1 sector in error per 10 bits trans ferred Unrecoverable Data Errors resulting from the same cause are treated as 1 error for that block Cheetah T10 SAS Product Manual Rev A 15 5 1 3 Seek errors A seek error is defined as a failure 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
48. and figure 26 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 requirement verified by measurement made across a load equiva lent to the zero length load shown in figure 24 For both test load cases the transmitter delivers the output voltages and timing listed in table 20 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 Figure 23 shows the compliance interconnect test load 50 ohm SAS internal connector Figure 23 Compliance interconnect test load Cheetah T10 SAS Product Manual Rev A 69 Figure 24 shows the zero length test load Tx Tx yd SAS internal connector Figure 24 Zero length test load Figure 25 shows an ISI loss example at 3 0 Gbps S dB Compliance interconnect magnitude response and IS loss example for 3 0 Gbps Sample compliance interconnect Frequency GHz Figure 25 ISI loss example at 3 0 Gbps Figure 26 shows an ISI loss example at 1 5 Gbps Compliance interconnect magnitude response and ISI loss example for 1 5 Gops Sample compliance interconnect Frequency GHz Figure 26 ISI loss example at 1 5 Gbps 70 Cheetah T10 SAS Product Manual Rev A 9 5 2 5 Receiver characteristics The drive recei
49. ase additional boxes Seagate recommends shipping by an air ride carrier experienced in handling computer equipment Product repair and return information Seagate customer service centers are the only facilities 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 T10 SAS Product Manual Rev A 21 22 Cheetah T10 SAS Product Manual Rev A 6 0 Physical electrical specifications This section provides information relating to the physical and electrical characteristics of the drive 6 1 AC power reguirements None 6 2 DC power reguirements The voltage and current requirements for a single drive are shown below Values indicated apply at the drive connector Table 2 ST3300555SS DC power requirements ST3300555SS ST3300555SS 1 5 Gbit mode 3 Gbit mode Amps Amps Amps 5V 5V 12V 2 Regulation 5 5 5 2 5 5 2 Avg idle current DCX 1 6 0 79 0 78 0 86 Maximum starting current peak DC DC 30 3 l 1 98 0 89 1 97 peak AC AC 30 3 3 32 1 21 3 28 Delayed motor start max DC 30 1 4 0 65 0 68 0 03 Voltage m 0 0 a U o N o O Peak operating current Typical DCX 1 1 02 0 81 1 03 Maximum DC 30 1 1 04 0 83 1 05 Maximum peak DC 30 2 86 1 58 2 82 0 15A DC and 0 2A AC 12V max start current margin added Cheetah T10 SAS Product Manu
50. cent 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 nterface 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 T10 SAS Installation Guide part number 100433695 and the Safety and Regulatory Agency Specifications part number 75789512 unless otherwise specified Cheetah T10 SAS Product Manual Rev A 9 3 8 Options factory installed You may order 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 e Other capacities can be ordered
51. cuit 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 equipment may be extended by replacing materials near circuitry with sulfide free alternatives Cheetah T10 SAS Product Manual Rev A 35 6 4 7 Acoustics Sound power during idle mode shall be 3 6 bels typical when measured to ISO 7779 specification Sound power while operating shall be 4 3 bels typical 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 13 for detailed physical dimensions See Section 8 3 Drive mounting Height Width Depth Weight 1 028 in 4 010 in 5 787 in 1 85 pounds 26 11 1 028 MAX UNITS OF MEASURE mm inches 101 60 25 4 000 010 2X 100 13 2X 3 942 26 11 mm 101 85 mm 146 99 mm 0 839 kilograms MAX 2X 20 14 2X 793 6X 6 32UNC 2B THRU NY 64 22 X 90 166 X 90 90 36 did 9
52. dom read operations refer to the following l O rate curve see Figure 5 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 CURRENT POWER vs THROUGHPUT SAS 1 5GB Random 8 Block Reads 1400 14 00 5VoltA g 2 Volt A 1200 12 00 4 Watts 1000 OO oco 10 00 O s 0 800 8 00 0 0d 4 2 s 0 600 600 AA 2 0 400 4 00 0 200 2 00 0 000 0 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 I Os per Second Figure 10 ST373355SS 1 5 Gbit DC current and power vs input output operations per second Cheetah T10 SAS Product Manual Rev A 31 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 pressure 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 b Operating The maximum allowable continuous or sustained HDA case temperature for the rated MTBF is 122 F 50 C The maximum allowable HDA case temperature is 60 C Occasional excursions of HDA case tem peratures above 122 F 50 C or below 41 F 5 C may occur without impact to specified MTBF Continual or sustai
53. drive failures in the period 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 MTBF is based on the following assumptions e 8 760 power on hours per year e 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 caused 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 MTBF hit 5 2 2 Preventive maintenance No routine scheduled preventive maintenance is required 16 Cheetah T10 SAS Product Manual Rev A 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 wil
54. e Read After Write see Section 7 7 The read error rates and specified storage capacities are not dependent on host initiator defect management routines 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 drive 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 Q 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 nterface Manual Also more information on the drive Error Recovery philosophy is presented in the SAS nterface 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
55. e Test condition Output voltage LED off high O V lt VOH lt 3 6 V 100 LA lt lop 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 18 defines the general interface characteristics Table 18 General interface characteristics Characteristic Units 1 5Gbps 3 0 Gbps Bit rate nominal 3 000 Unit interval UI nominal 333 3 Impedance nominal differential ohm 100 Transmitter transients maximum 1 2 Receiver transients maximum teli 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 102 of the jitter population The random content of the total jitter population has a range of 7 standard deviations 62 Cheetah T10 SAS Product Manual Rev A 9 5 2 1 2 Receive eye mask Figure 20 describes the receive eye mask This eye mask applies to jitter after the application of a single pole high pass frequency weighting function that progressively attenuates jitter at 20 dB decade below a frequency of bit rate 1 667 Absolute amplitude in V 0 XI X 1 X1 1 1 X2 Normalized time in U Figure 20 Receive eye mask Verifying compliance with the limits represented by the receive eye mask
56. e vertical axis To calculate BTUs per hour multiply watts by 3 4123 CURRENT POWER vs THROUGHPUT SAS 3 0GB Random 8 Block Reads 1 400 18 00 5Volt A 4 00 1 000 2 00 V 2 o 0 800 0 00 2 3 8 00 Fi amp 9600 6 00 0 400 4 00 2 0 200 2 00 0 000 0 00 0 0 50 0 100 0 50 0 200 0 250 0 300 0 I Os per Second Figure 5 ST3300555SS 3 Gbit DC current and power vs input output operations per second ST3300555SS in 1 5 Gbit operation Typical power dissipation under idle conditions in 1 5 Gbit operation is 14 15 watts 48 28 BTUs per hour To obtain operating power for typical random read operations refer to the following I O rate curve see Figure 5 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 CURRENT POWER vs THROUGHPUT SAS 1 5GB Random 8 Block Reads 1400 18 00 5Volt A 600 HE 12 Volt A 4 00 1000 200 y ii 0 800 aa gt A 9 0 00 D 3 8 00 5 0 600 lt x v 6 00 0 400 4 00 0 200 2 00 0 00 0 0 50 0 100 0 150 0 200 0 250 0 300 0 I Os per Second Figure 6 ST3300555SS 1 5 Gbit DC current and power vs input output operations per second Cheetah T10 SAS Product Manual Rev A 2
57. ease as long as the total jitter does not exceed the specified maximum total jitter d Total jitter is specified at a probability of 102 e 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 frequency of bit rate 1 667 f 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 1012 and the average of the individual events is the measure of the asymmetry Jitter peak to peak measured lt maximum total jitter Asymmetry 66 Cheetah T10 SAS Product Manual Rev A 9 5 2 3 2 Receiver jitter tolerance Table 22 defines the amount of jitter the receiver shall tolerate Table 22 Receiver jitter tolerance 1 5 Gbps 3 0 Gbps Sinusoidal Deterministic Total Sinusoidal Deterministic Total jitterb jittere th jitter jitterb A jitter 9 jitter a Units are in Ul 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 102 Receivers shall tolerate sinusoidal jitter of progressively greater am
58. eflectometer rise time 20 to 80 P 50 Media PCB or cable s p 32 5 27 5 Mated connectors om 8 Differential impedance 4 100 15 ohm fs Differential impedance Differential impedance imbalance 5 9 9 Common mode impedance Differential impedance imbalance 9 9 E 5 32 5 t 7 5 32 5 t 5 100 15 100 15 5 p Common mode impedance Receiver termination Differential impedance Differential impedance imbalanceP 8 9 Receiver termination time constant Cheetah T10 SAS Product Manual Rev A 67 Table 23 Impedance requirements Sheet 2 of 2 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 impedance imbalance ohm 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
59. er Seagate SAS drives Figure 1 Cheetah T10 SAS disc drive Cheetah T10 SAS Product Manual Rev A 1 Cheetah T10 SAS Product Manual Rev A 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 Com
60. ev A 3 4 Reliability e 1 400 000 hour MTBF Annualized Failure Rate AFR of 0 62 e Incorporates industry standard Self Monitoring 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 2 Seagate drives also may be used at the maximum 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 per
61. g EMC certification followed by an eight digit identification num ber as a Marking it complies with Chinese National Standard CNS 13438 and meets the Electromagnetic Compatibility EMC Framework requirements of the Taiwanese Bureau of Standards Metrology and Inspec tion BSMI 4 Cheetah T10 SAS Product Manual Rev A 2 3 Reference documents Cheetah T10 SAS Installation Guide SCSI Commands Reference Manual SAS Interface Manual Applicable ANSI SAS documents SFF 8323 SFF 8460 SFF 8470 SFF 8482 ANSI INCITS xxx Seagate part number 100433695 Seagate part number 100293068 Seagate part number 100293071 3 5 Drive Form Factor with Serial Connector HSS Backplane Design Guidelines Multi Lane Copper Connector SAS Plug Connector Serial Attached SCSI SAS Standard 110 1562 D ISO IEC 14776 xxx SCSI Architecure Model 3 SAM 3 Standard T10 1561 D ISO IEC 14776 xxx SCSI Primary Commands 3 SPC 3 Standard T10 1416 D ISO IEC 14776 xxx 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 Requirement and Procedures Seagate part number 30553 001 Package Test Specification Package Test Specification Seagate P N 30190 001 under 100 lb Seagate P N 30191 001 over 100 Ib In case of conflict between this document and any referenced document this document takes precedence Cheetah T10
62. iday The presales and technical support call center is located in Oklahoma City 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 Austria Belgium Denmark France Germany Ireland Italy Netherlands Norway Poland Spain Sweden Switzerland Turkey United Kingdom Presales and Technical Support 00 800 47324283 00 800 4SEAGATE 00 800 47324283 00 800 47324283 00 800 47324283 00 800 47324283 00 800 47324283 00 800 47324283 00 800 47324283 00 800 311 12 38 00 800 47324283 00 800 47324283 00 800 47324283 00 800 31 92 91 40 00 800 47324283 FAX services All Europe toll call Technical Support Warranty Service 1 405 324 3339 31 20 653 3513 Cheetah T10 SAS Product Manual Rev A Warranty Service 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 47324289 00 800 311 12 38 00 800 47324289 00 800 47324289 00 800 47324289 00 800 31 92 91 40 00 800 47324289 19 Africa Middle East support services For presales and technical support in Africa and the Middle East dial our presales
63. ied 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 10 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 downloading 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
64. inusoidal jitter frequency jitter log log plot in Ul S NM ER From 3 0 x 10 for 3 0 Gbps 1 0 0 1 0 From 29 000 Fuom 1 667 Frequency in KHz Figure 22 Sinusoidal jitter mask 64 Cheetah T10 SAS Product Manual Rev A 9 5 2 2 Transmitter signal characteristics Table 19 specifies the signal requirements 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 sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate Table 19 specifies the signal characteristics Table 19 Transmitter signal characteristics Signal characteristic Units 1 5Gbps oo 3 0 Gbps Tx Off Voltage mV P P lt 50 Maximum rise fall time 273 137 Minimum rise fall time 67 Maximum transmitter output imbalance 10 OOB offset delta 25 OOB common mode deltaY 50 a All tests in this table shall be performed with zero length test load shown in figure 24 b he 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 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 c The transmitter off voltage is the maximum A C voltage measured at compliance points when the tra
65. ion 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 32 33 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 equipment 43 hot plugging the drive 17 humidity 33 humidity limits 32 Idle Read After Write 40 inquiry data 51 installation 41 guide 5 interface commands supported 47 error rate 15 errors 16 illustrated 57 physical 57 18 reguirements 45 intermediate condition met good status 56 intermediate good status 56 internal data rate 11 internal defects errors 37 internal drive characteristics 11 IRAW 40 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 maintenance 15 maximum delayed motor start 23 24 maximum start current 23 24 media description 8 Media Pre Scan 39 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 Segmented 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 Bus
66. ion 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 Mode Sense 10 same pages as Mode Sense 1Ah Prefetch Read Read Buffer modes 0 2 3 Ah and Bh supported Read Capacity Read Defect Data 10 Read Defect Data 12 Read Extended DPO bit supported FUA bit supported Read Long 48 Command code Supported O1 55h 4 lt lt lt lt lt Z lt Pd lt lt Pi lt lt lt apa lt lt A 34 08h 3Ch 25h 37h B7h 28h O1 y me DE lt lt lt lt lt lt lt lt lt 2 lt SEh Cheetah T10 SAS Product Manual Rev A M M ie Table 8 Commands supported by Cheetah T10 SAS family drives continued Command name Reassign Blocks Receive Diagnostic Results Supported Diagnostics pages 00h Translate page 40h Release Release 10 Request Sense Actual Retry Count bytes Extended Sense Field Pointer bytes Reserve 3rd Party Reserve Extent Reservation Reserve 10 3rd Party Reserve Extent Reservation Rezero Unit Search Data Equal Search Data High Search Data Low Seek Seek Extended Send Diagnostics Supported Diagnostics pages 00h Translate page 40h Set Limits Start Unit Stop Unit spindle ceases rotating Synchronize Cache Test Unit Ready Verify BYTCHK bit Wri
67. l 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 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 required to insure data integrity 5 2 4 S M A R T S M A R T is an acronym for 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
68. llowed during initial spindle start but must return to 5 before reaching 15 000 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 Figures 2 3 and 4 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 tolerance includes ripple noise and transient response During idle the drive heads are relocated every 60 seconds to a random location within the band from three quarters to maximum track General DC power requirement notes d 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
69. mitters 61 transporting the drive 21 U unformatted 9 Unrecoverable Errors 15 unrecovered media data 15 V vibration 33 35 W warranty 21 Z zero latency read 56 zone bit recording ZBR 8 80 Cheetah T10 SAS Product Manual Rev A Seagate Seagate Technology LLC 920 Disc Drive Scotts Valley California 95066 4544 USA Publication Number 100433694 Rev A Printed in USA
70. munications The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides reasonable 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 requirements in their system Shielded I O cables may be required if the enclosure does not provide adequate shielding If the I O cables are external to the enclosure shielded cables should be used with the shields grounded to the enclosure and to the host controller 2 1 1 1 Electromagnetic susceptibility As a component assembly the drive is not required to meet any susceptibility performance requirements lt is the responsibility of those integrating the drive within their systems to perform those tests required and design their system to ensure that equipment 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 3 and 4 for DC power requirements Cheetah T10 SAS Product Manual Rev A 3 2 2 Compliance 2 2 1 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 mos
71. nce 0 aaan ee eee 16 5 2 3 Hot plugging the drive 0 0 tee eee 17 5 2 4 SMAR Mes A E HS ME ate aoa Sas 17 5 2 5 Thermal MONO 66 ta ida na Ganda k 18 5 2 6 Drive Sel Tests Tic nana Bata AA ewes 19 5 2 7 Produet waranty decada fy cei aman a hana ada qed 21 Pnysical electrical specifications sade k Pra PAP cae ene beta eae LD E 23 6 1 AG power requirements aa Men eA Re BA a 23 6 2 DC power requirements x oba a beb BN WE ana RAB we SMS boa Tea vn 23 6 2 1 Conducted noise immunity inn 25 6 2 2 Power sequencing aras rre Bh ch B AE AAA o v bk 25 6 2 3 Curent poles aii a plans a a A na bi da 25 6 3 Power dissipation sa sarren ia rs D doo a 29 6 4 ENVIFON Menta MIS 64 22 ii za RA A Sot AA 32 Cheetah T10 SAS Product Manual Rev A 7 0 8 0 9 0 10 0 6 4 1 TEMPE AM O tds a a NA AE A o r BN 32 6 4 2 Relative humidity za a ttre eine EA 33 6 4 3 Effective altitude sea level nooo 33 6 4 4 SNOEK ana VIDA MON aa ee de Ne bo ai 33 6 4 5 All ClCANIINGSS si a is E AS BEE A 35 6 4 6 Corrosive environment Wa 35 6 4 7 ACOUSIES aia bb is L dd cd dni 36 6 4 8 Electromagnetic susceptibility 36 6 5 Mechanical specifications via td aaa A Bom ah hs aa AA ai 36 Defect and error management sk on d da boa td dia 37 7 1 Drive internal defects errors LL eee eee 37 7 2 Drive error recovery procedures
72. nd lf there are the respective cache segments are cleared The new data is cached for subsequent Read 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 Tables 10 11 and 12 shows the mode default settings for the drives 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 c
73. ned for defects prior to being put into service by the host system On regular duty drives if the host system makes use of the BMS Log Page it can avoid placing data in suspect locations on the media Unreadable and recovered error sites will be logged or reallocated per ARRE AWRE settings With BMS the host system can consume less power and system overhead by only checking BMS status and results rather than tying up the bus and consuming power in the process of host initiated media scanning activ ity Since the background scan functions are only done during idle periods BMS causes a negligible impact to sys tem performance The first BMS scan for a newly manufactured drive is performed as quickly as possible to verify the media and protect data by setting the Start time after idle to 5ms all subsequent scans begin after 500ms of idle time Other features that normally use idle time to function will function normally because BMS functions for bursts of 800ms and then suspends activity for 100ms to allow other background functions to operate BMS interrupts immediately to service host commands from the interface bus while performing reads BMS will complete any BMS initiated error recovery prior to returning to service host initiated commands Overhead associated with a return to host servicing activity from BMS only impacts the first command that interrupted BMS this results in a typical delay of about 1 ms 7 5 Media Pre Scan Media
74. ned operation at HDA case temperatures outside these limits may degrade MTBF Provided the HDA case temperatures limits are met 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 Air flow may be needed in the drive enclosure to keep within this range see Section 8 3 Operation at HDA case temperatures outside this range may adversely affect the drives ability to meet specifications To confirm that the required cooling for the electronics and HDA case is provided place the drive in its final mechanical configuration perform random write read operations and measure the HDA case temperature after it has stabilized 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 11 Location of the HDA temperature check point 32 Cheetah T10 SAS Product Manual Rev A 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 10 000 feet 305 to 3 048 meters Non operating
75. 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 power cables If you intend the use the drive in a non backplane host system connecting the drive using high quality 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 connector Figure 14 Physical interface 8 1 Drive orientation The drive may be mounted in any orientation All drive performance cha
76. nsmitter is unpowered or transmitting D C idle e g during idle time of an OOB signal d Rise fall times are measured from 20 Ye to 80 of the transition with a repeating 0101b pattern on the physical link e The maximum difference between the V4 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 24 as a percentage of the average of the V and V A C RMS amplitudes f The maximum difference in the average differential voltage D C offset component between the burst times and the idle times of an OOB signal g The maximum difference in the average of the common mode voltage between the burst times and the idle times of an OOB signal Cheetah T10 SAS Product Manual Rev A 65 9 5 2 3 Receiver signal characteristics Table 20 defines the compliance point requirements of the signal at the receiver end of a TxRx connection as measured into the test loads specified in figure 23 and figure 24 Table 20 Receiver signal characteristics Signal characteristic Units 15Gbps 3 0 Gbps Jitter see figure 20 See table 21 2 x Z1 325 275 Max voltage non op 2 000 P Minimum OOB ALIGN burst amplitude mV P P 240 P P Maximum noise during OOB idle time mV P 120 Max near end crosstalk mV P P 100 a The value for X1 shall be half the value given for total jitter in table 21 The test or analysis shall include the effects of a single pole high pass frequency
77. oadable using the SAS interface 128 deep task set queue Supports up to 32 initiators Jumperless configuration User selectable logical block size 512 520 524 or 528 bytes per logical block Perpendicular recording technology 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 16 Mbyte 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 e Programmable multi segmentable cache buffer e 300 Mbytes sec maximum instantaneous data transfers e 15k RPM spindle Average latency 2 0 msec e Background processing of queue e Supports start and stop commands spindle stops spinning e Adaptive seek velocity improved seek performance 8 Cheetah T10 SAS Product Manual R
78. onesia 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 bi 00 800 0830 1 730 Thailand 001 800 11 0032165 Customer Service Operations Warranty Service Call center Toll free Direct dial FAX Asia Pacific 465 6485 3595 465 6485 4860 Australia 1800 12 9277 India 91 44 42015000 91 44 42015184 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 SHours of operation are 9 30 A M to 6 30 P M Monday through Friday Authorized Service Center 76 Cheetah T10 SAS Product Manual Rev A Index Numerics 12 volt pins 61 5 volt pins 61 A abort task set function 45 AC coupling 61 AC power requirements 23 ACA active status 56 ACA active faulted initiator status 56 acoustics 36 active LED Out signal 61 actuator assembly design 7 adaptive caching 56 AFR 9 air cleanliness 35 air flow 42 illustrated 42 air inlet 42 altitude 33 ambient 32 ambient temperature 42 ANSI documents SCSI 5 Serial Attached SCSI 5 asynchronous event notification 56 audible noise 3 auto write and read reallocation programmable 8 automatic contingent allegiance 56 average idle current 23 24 average rotational latency 11 B Backg
79. plitude at lower frequencies according to the mask in figure 22 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 12 The additional 0 1 Ul 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 frequency 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 23 defines impedance requirements Table 23 Impedance requirements Sheet 1 of 2 Requirement Units 1 5Gbps 3 0 Gbps Time domain r
80. pm Avg rotational latency 2 0 2 0 2 0 msec One Gbyte eguals one billion bytes when referring to hard drive capacity Accessible capacity may vary depending on operating environment and formatting Rounded off value 4 2 Seek time See Section 9 4 1 SAS physical interface on page 57 and the SAS Interface Manual part number 100293071 for additional timing details 4 2 1 Access time Not Including controller overhead msec Read Write Average Typical 3 5 4 0 Single track Typical 0 2 0 4 Full stroke Typical 6 8 7 5 1 Typical access times are measured under nominal conditions of temperature voltage and horizontal orientation as measured on a representative sample of drives 2 Access to data access time latency time Cheetah T10 SAS Product Manual Rev A 11 4 2 2 Format command execution time minutes ST3300555SS ST3146755SS ST373355SS Maximum with verify 145 90 60 Maximum without verify 90 45 30 Execution time measured from receipt of the last byte of the Command Descriptor Block CDB to the reguest for a Status Byte Transfer to the Initiator excluding connect disconnect 4 2 3 General performance characteristics Sustainable disc transfer rate Minimum 55 5 Mbytes sec Maximum 93 Mbytes sec SAS Interface maximum instantaneous transfer rate 300 Mbytes sec per port dual port 600 Mbytes sec Logical block sizes Default is 512 byte data blocks Sector sizes variable to 512 520 524 an 528
81. 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 15 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 16 Table 16 Ready LED Out conditions Normal command activity LED status Ready LED Meaning bit mode page 19h Spun down and no activity Off Off Spun down and activity command executing On Spun up and no activity 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 T10 SAS Product Manual Rev A 61 The Ready LED Out signal is designed to pull down the cathode of an LED The anode is attached to the proper 43 3 volt supply through an appropriate current limiting resistor The LED and the current limiting resis tor are external to the drive See Table 17 for the output characteristics of the LED drive signals Table 17 LED drive signal Stat
82. r wo oo ss oo ju co oo m oo m co oo m mjw moja en w uo for for o Foo oo oo o o oo fan o o we ms Ima oo oo o o co m oo or oo oo Jun ov oo om o Ja for nju e le v je eo uje Jo se ooo me a o e o o o r e o s ella far Jo Copyright year changes with actual year SCSI Revision support See the appropriate SPC release documention for definitions PP 10 Inquiry data for an Inquiry command received on Port A 30 Inquiry data for an Inquiry command received on Port B R Four ASCII digits representing the last four digits of the product firmware release number S Eight ASCII digits representing the eight digits of the product serial number Bytes 16 through 26 reflect model of drive The table above shows the hex values for Model ST3300555SS Refer to the values below for the values of bytes 16 through 26 of your particular model xx ST3300555SS 53 54 33 33 30 30 35 35 35 53 53 ST3146755SS 53 54 33 31 34 36 37 35 35 53 53 ST373355SS 53 54 33 37 33 33 35 35 53 53 20 9 3 2 Mode Sense data The Mode Sense command provides 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
83. racterizations 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 T10 SAS Product Manual Rev A 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 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 15 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
84. ransmitters and receivets 61 9 4 7 OW Cl he sy eects Gah ca eth ty ns ah ans A ho k lados 61 9 5 signal ehara tensi CS o airada nA 61 9 5 1 Ready LED O ea heer adie di sakes Ee oe a E 61 9 5 2 Differential signals iaa ar MAAN Ra id Aa Mo OE Ba H 62 Seagate Technology support services cccocococcocococooocoooocooco c m 73 Cheetah T10 SAS Product Manual Rev A 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 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 List of Figures Cheetah TIOS ASUISCAMVO an as a Da 1 Typical ST3300555SS drive current profiles L 26 Typical ST3146755SS drive current profiles 27 Typical ST373355SS drive current profiles 28 ST3300555SS 3 Gbit DC current and power vs input output operations per second 29 ST3300555SS 1 5 Gbit DC current and power vs input output operations per second 29 ST3146755SS 3 Gbit DC current and power vs input output operations per second 30 ST3146755SS 1 5 Gbit DC current and power vs input output operations per second 30 ST373355SS 3 Gbit DC
85. round Media Scan 39 backpanel 60 BMS 39 buffer data 8 Space 13 busy status 56 C cache operation 13 cache segments 13 caching write data 14 Canadian Department of Communications 3 Capacity Cheetah T10 SAS Product Manual Rev A unformatted 11 check condition status 56 chemical pollutants 35 class Blimit 3 clear ACA function 45 clear task set function 45 commands supported 47 condensation 33 condition met good status 56 connector illustrated 59 requirements 59 continuous vibration 35 cooling 42 corrosive environment 35 CRC error 16 Current profiles 25 customer service 21 D DAR 40 data block size modifing the 9 data heads read write 11 data rate internal 11 data transfer rate 12 DC power 60 requirements 23 defect and error management 37 defects 37 Deferred Auto Reallocation 40 deferred error handling 56 description 7 dimensions 36 disc rotation speed 11 drive 35 drive characteristics 11 drive failure 16 drive malfunction 16 drive mounting 36 43 drive select 60 dual port support 46 E electrical description of connector 60 signal characteristics 61 specifications 23 electromagnetic compatibility 3 electromagnetic susceptibility 36 EMl requirements 3 11 environment 42 environmental limits 32 reguirements 15 environmental control 35 error management 37 rates 15 errors 37 F FCC rules and regulations 3 features 8 interface 45 firmware 8 corruption 50 flawed sector reallocat
86. rt 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 diagnostic 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 required to recover the data The following conditions are considered DST failure conditions e Seek error after retries are exhausted e 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 T10 SAS
87. s This methodology specifies the trans mitter signal at the test points on the required 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 Soil 20 x logio e x 6 5 x 10 xP 2 0 x 10 x f 3 3 x 10 for 50 MHz lt f lt 1 5 GHz and Soil 5 437dB for 1 5 GHz lt f lt 5 0 GHz where 20 x f dB a fis the signal frequency in hertz The transmission magnitude response of the TCTF in dB is given by the following equation for 3 0 Gbps Soil 20 x log ole x 6 5 x 10 xf 2 0 x 10 x f 3 3 x 10 xP dB for 50 MHz lt f lt 3 0 GHz and 5211 10 884dB for 3 0 GHz lt f lt 5 0 GHz where f is the signal freguency in hertz The TCTF is used to specify the requirements 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 25
88. s not counted against the recovery time limit 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 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 oo 2 203 49 2 55 86 3 219 45 3 67 83 4 253 11 4 119 79 5 219 35 5 default 147 72 6 311 27 7 395 12 8 463 12 9 495 04 10 530 95 11 default 1 282 97 1 38 These values are subject to change 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 253 11 msec recovery time for each of the four LBAs in the command If the recovery time limit is set to 00 C8 hex 200 msec decimal a four LBA read command is allowed to take
89. s 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 10 500 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 equivalent 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 cir
90. sa coeds bosa howe hon au eee ee eae 9 3 6 Programmable drive capacity 0 ccc eee eee eens 9 3 7 Factory installed accessories 9 3 8 Options factory insialed sica odas SN AN bad Baek DEN ska wee hy b a 10 3 9 User installed accessonesS io is da SN BEP a b BB 10 Performance chara cien SN Sae eased iw ad ade 11 41 Internal drive characteristics 11 4 2 A O i k RA 11 4 2 1 ACCESS UME aria dd ts aid Ba aa uban 11 4 2 2 Format command execution time Minutes 12 4 2 3 General performance characteristics 12 4 3 Start SIONES E A ON AAS id edi 12 4 4 Prefetch multi segmented cache control 13 4 5 cache Operation vsi zeja ett t is A o dd 13 4 5 1 Gachihg wite dala ic ke a A R Ma ae 14 4 5 2 Pretere ODO AUON usd ri e LA or AO apt eval a a BA KU an e 14 Reliability specifications hc ari aid 15 5 1 EMO a Sisa Dd EE A as 15 5 1 1 Recoverable ETTOTS L eee eee nes 15 5 1 2 Untecoverable EMOS a ps zi bod a k na AA heed Boe tweed Bed 15 5 1 3 OPOK SNOS oc Sn OA eee tem Soha Reese tees Sot b hk 16 5 1 4 Herra errors iia da hin ch oe tica setan teen dra daw didn ety alat Ahlan ck 16 5 2 Reliability and SEGEL ae se nd aa ii AR 16 5 2 1 Mean time between failure MTBF 16 5 2 2 Preventive maintena
91. sev eral SCSI commands described in the SAS Interface Manual The drive implements selectable error recovery time limits required 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 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 Cheetah T10 SAS Product Manual Rev A 37 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 equates 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 i
92. t ACA active faulted initiator 56 Cheetah T10 SAS Product Manual Rev A 9 4 1 SAS physical interface Figure 16 shows the location of the SAS device connector J1 Figures 17 and 18 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 SAS Interface gt connector Figure 16 Physical interface Cheetah T10 SAS Product Manual Rev A 57 U CL 0X ea EE E 0 02 A 4 08 4 65 set 8 m 0 52 10 08 x 457 2 00 3X gt 40 45 0 03 7X tL 9 08 A O 10M E m 42 73 REF gt 41 13 0 15 gt 10 20 B 0 30 0 05 2X Mll4 l A if B 1 10 4 00 0 08 i B OF DATUM D j A A A A RO 30 0 08 4X 0 30 0 05 4x B SEE Detaill La 33 43 0 05 gt gt B 15 875 gt 15 875 1 27 14 1 27 60 gt 0 84 0 05 22X
93. t popular characteristics for test platforms The system configurations include e Typical current use microprocessor e 3 5 inch floppy disc drive e Keyboard e Monitor display e Printer e 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 reguirements 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 meanin
94. tained circular buffer whose length is an integer number of logical blocks The drive dynamically creates and removes segments based on the workload The wrap around capa bility of the individual segments greatly enhances the cache s overall performance 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 If 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 Cheetah T10 SAS Product Manual Rev A 13 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 comma
95. te Write and Verify DPO bit Write Buffer modes 0 2 supported Firmware Download option modes 5 7 Ah and Bh supported 3 Write Extended DPO bit Cheetah T10 SAS Product Manual Rev A Command code Supported 07h 1Ch 17h 57h h 09 gt 16 56h 01h 31h Oh 32h OBh B 1Dh oO lt lt lt lt lt lt Z P3 Z Z Z lt Z lt lt Z lt lt P3 lt O h 1Bh 39h 00h 2Fh O 09 OAh Eh 3Bh 2Ah lt lt 49 Table 8 Commands supported by Cheetah T10 SAS family drives continued Command name Supported Write Long 3Fh Y Write Same Y XDRead 52h N XDWrite 50h N 1 Cheetah drives can format to 512 520 524 or 528 bytes per logical block 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 request 50 Cheetah T10 SAS Product Manual Rev A 9 3 1 Inquiry data Table 9 lists the Inquiry command data that the drive should return to the initiator per the format given in the SAS Interface Manual Table 9 Cheetah T10 SAS inguiry data os Tm oo o 1e s m Jo a Ts e Ja Te s To mero r n re ae re mu s se se se se se se se oo o
96. 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 element 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
97. 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 68 C 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 log page see Table 1 can 18 Cheetah T10 SAS Product Manual Rev A be used to set this trip point The default value for this drive is 68 C however you can set it to any value in the range of 0 to 68 C If you specify a temperature greater than 68 C in this field the temperature is rounded down to 68 C A sense code is sent to the host to indicate the rounding of the parameter field Table 1 Temperature Log Page 0Dh 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 qualify 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 Sho
98. tion and your ST model number available SeaTDD 1 405 324 3655 is a telecommunications device for the deaf TDD You can 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 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 Cheetah T10 SAS Product Manual Rev A 73 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 speak with a case management representative call 1 800 475 0143 Additional information including an online request form and data loss prevention 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
99. 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 subject 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 Cheetah T10 SAS Product Manual Rev A 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 7 4 Background Media Scan Background Media Scan BMS is a self initiated media scan BMS is defined in the 110 document SPC 4 available from the 110 committee BMS performs sequential reads across the entire pack of the media while the drive is idle In RAID arrays BMS allows hot spare drives to be scan
100. ver is A C coupled The receive network terminates the TxRx connection by a 100 ohm equiva lent impedance as specified in table 23 The receiver operates within a BER of 1012 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 20 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 22 and the common mode signal Vey over frequency range Fon as specified in table 18 The jitter tolerance is shown in Figure 22 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 UI 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 T10 SAS Product Manual Rev A 71 12 Cheetah T10 SAS Product Manual Rev A 10 0 Seagate Technology support services Online services Internet www seagate com for information about Seagate products and services Worldwide support is available 24
101. weighting function that progressively attenuates jitter at 20 dB decade below a frequency of bit rate 1 667 b The value for X1 applies at a total jitter probability of 10 12 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 requirements c With a measurement bandwidth of 1 5 times the baud rate i e 4 5 GHz for 3 0 Gbps d 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 e 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 21 defines the maximum allowable jitter Table 21 Maximum allowable jitter 1 5 Gbps 3 0 Gbps Deterministic jitter Total jitterc d e f Deterministic jittere Total jitterc de f a Units are in UI b The values for jitter in this section are measured at the average amplitude point c 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 incr
102. y 56 Check condition 56 Condition met good 56 Good 56 Intermediate condition met good 56 Intermediate good 56 Reservation conflict 56 Task setfull 56 miscorrected media data 15 Mode sense data table 51 53 mounting 43 holes 43 orientations 41 Cheetah T10 SAS Product Manual Rev A N noise audible 3 noise immunity 25 non operating 33 35 temperature 32 non operating vibration 35 O office environment 35 operating 33 35 operating environment 16 option selection 60 out of plane distortion 43 P package size 34 package test specification 5 packaged 34 parameter rounding 56 PCBA 43 peak bits perinch 11 peak operating current 23 24 peak to peak measurements 25 performance characteristics detailed 11 general 12 performance degradation 33 performance highlights 8 physical damage 35 physical dimensions 36 physical interface 57 physical specifications 23 pin descriptions 60 power 61 dissipation 29 requirements AC 23 requirements DC 23 sequencing 25 power distribution 3 power on operating hours 16 power up hours 16 prefetch multi segmented cache control 13 preventive maintenance 15 Q queue tagging 56 R radio interference regulations 3 RCD bit 13 read error rates 15 37 read write data heads 11 Cheetah T10 SAS Product Manual Rev A receivers 61 recommended mounting 34 Recoverable Errors 15 recovered media data 15 reference documents 5 relative humidity 33 reliability 9 specifications 1

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