Seagate ST3300555SS manuale d’uso

Cheet ah T10 SAS ST3300555SS ST3146755SS ST373355SS[...]

©2006, Seagate T echnology LLC All rights rese rved Publication number: 10043369 4, A October 2006 Seagate , Seagate T echnology , and the Seagate logo are registe red trademarks of Seagate T echnology LLC. SeaT ools, SeaFONE, SeaBOARD, and SeaTDD are either registered tr ade - marks or trademar ks of Seagate T echnology LLC. Other product na mes [...]

Cheetah T10 SAS Product Manual, Rev. A i Content s 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance a nd reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Standards . . . [...]

ii Cheetah T10 SAS Product Manual, Rev. A 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.4.2 Relative humidit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 6.4.3 Effective altitude (sea level) . . . . . . . . . . . [...]

Cheetah T10 SAS Product Manual, Rev. A 1 List of Figures Figure 1. Cheetah T10 SAS disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Typical ST3300555SS drive current profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

2 Cheetah T1 0 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 1 1.0 Scope This manual describes Seagate T echnology ® LLC, Cheetah ® SAS (Serial Attached SCSI) disc drives. Cheetah drives support the SAS Protoc ol specifications to the extent described in th is manual. The SAS Inter - face Manual (part number 1002 93071) describes the general SAS characteristics of Che[...]

2 Cheetah T1 0 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 3 2.0 S tandards, compliance and reference document s The drive has been developed as a syst em peripheral to the highest standa rds of design and construction. The drive depends on it s host equipment to provide a dequate power and environme nt for optimum performance and compliance with applicable industry a[...]

4 Cheetah T1 0 SAS Product Manual, Rev. A 2.2 Compliance 2.2.1 Elec t romagnetic compliance Seagate uses an in dependent laborator y to confirm comp liance with the directives/standards for CE Marking and C-T ick Marking. The drive was tested in a r epresen t ative system for typical applications. The selected sys - tem represe nts the most pop ula[...]

Cheetah T10 SAS Product Manual, Rev. A 5 2.3 Reference document s Cheetah T10 SAS Installation Guid e Seagate part nu mber: 100433695 SCSI Commands Reference Manual Seagate par t n u mber: 100293068 SAS Interface Manua l Seagate part nu mber: 100293071 Applicable ANSI SAS documents SFF-8323 3.5” Drive Form Fa ctor with Serial Connector SFF-8460 H[...]

6 Cheetah T1 0 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 7 3.0 General description Cheetah drives com bine giant magnetoresistive (GMR ) heads, p artial response/maximum likelihood (PRML) read channel electronics, embedded servo technology , and a Serial At tached SCSI (SAS) in terface to provide high performanc e, high capacity dat a storage for a vari ety of syste[...]

8 Cheetah T1 0 SAS Product Manual, Rev. A 3.1 St andard features Cheetah drives hav e the following standard features : • 1.5 / 3 Gbit Serial Attached SCSI (SAS) interface • Integrated dual port SAS controller suppor ting the SCSI protocol • Support for SAS exp anders and fanout adapters • Firmware downlo adable using the SAS interface • [...]

Cheetah T10 SAS Product Manual, Rev. A 9 3.4 Reliability • 1,400,000 hour MTBF (Ann ualized Failure Rate (AFR) of 0.62%) • Incorporat es industry-standar d Self-Monitor ing Analysis and Reporting T echnology (S.M.A.R.T .) • 5-year warranty 3.5 Formatted cap acities S tandard OEM models are formatted to 512 bytes pe r blo ck. The block size is[...]

10 Cheetah T10 SAS Product Manual, Rev. A 3.8 Options (factory inst alled) Y ou may order the following items whic h are incorporated at th e manufacturing facility during production or packaged befo re shipping. Some of the options availabl e are (not an exhaustive list of possible options): • Other cap acities can be ordered depen ding on spari[...]

Cheetah T10 SAS Product Manual, Rev. A 11 4.0 Performance characteristics This section provides deta iled information concerning performance-related char acte r istics and fe atures o f Cheetah drives. 4.1 Internal drive characteristics ST3300555SS ST3146755SS ST3733 55SS Drive capacity 300.0 146.8 73.4 Gbytes (formatted, rounded off value) *,** Re[...]

12 Cheetah T10 SAS Product Manual, Rev. A 4.2.2 Format command exe cu ti on tim e (minutes) Execution time measured fr om receipt of the last byte of the Command Descriptor Block (CDB) to the request for a S tatus Byte T ransfer to the Init iator (ex cluding connec t/disconnect). 4.2.3 General perfo rmance char acteristics 4.3 St art/stop time The [...]

Cheetah T10 SAS Product Manual, Rev. A 13 The ST ART ST OP UNIT com mand may be u sed to command t he drive to stop th e spindle. S top time is 30 sec - onds (maximum) from removal of DC power . T here is no power control switch on the drive. 4.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read look-ahead) and mu lti-seg m[...]

14 Cheetah T10 SAS Product Manual, Rev. A 4.5.1 Cac hing write data Write caching is a wr ite op eration by the dr ive that m akes us e of a driv e buffer storag e area where th e data to be written to the med ium is stored while the drive performs th e Write command. If read caching is en abled (RCD=0), then data written to t he medium is retained[...]

Cheetah T10 SAS Product Manual, Rev. A 15 5.0 Reliability specifications The following reliability specifications assume correct host and drive operational interfac e, including all inter - face timings, power supply volt ages, environmental requirements and drive mou n tin g c on st ra ints. 5.1 Error rates The error rates st ated in this manual a[...]

16 Cheetah T10 SAS Product Manual, Rev. A 5.1.3 See k errors A seek error is defined as a failure of the drive to posi tion the heads to the addressed track. After detecting an initial seek error , the drive automatically performs an er ror recovery process. If the error recovery process fails, a seek positioning error (E rror code = 15h or 02h) wi[...]

Cheetah T10 SAS Product Manual, Rev. A 17 5.2.3 Hot plugging the drive When a disc is powere d on by switching the power or hot plugged, the drive runs a se lf test before atte mpting to communicate on its’ interfaces. Wh en the self test completes successfu lly , the drive initiates a Link Reset starting with OOB. An attached device should respo[...]

18 Cheetah T10 SAS Product Manual, Rev. A Reporting contro l Reporting is controlled by the MRIE bit s in the Informat ional Excep tions 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 reset s and power cycles. Determining rate S.M.A.R.T . [...]

Cheetah T10 SAS Product Manual, Rev. A 19 be used to set this trip point. The default va lue for this drive is 6 8°C, howe ver , you can set it to any value in the range of 0 to 6 8°C. If you specify a temperature greater than 68°C in this field, the tempe rature is rounded down to 68°C. A sense code is sent to the host to ind icate the round i[...]

20 Cheetah T10 SAS Product Manual, Rev. A 5.2.6.2. 1 St ate o f the drive p rior to test ing The drive must be in a read y state before issuing the Sen d Diagnostic comman d. There are multiple reasons why a drive m ay not be re ady , s ome of which are valid c onditions, and not errors. For exampl e, a dr ive may b e in process of doing a format, [...]

Cheetah T10 SAS Product Manual, Rev. A 21 2. The Self-T est Results V alue field is set to Fh 3. The drive will store the log page to non-volatile memory After a self- test is complete or has been aborted , the driv e updates the Self-T est Result s V alue field in its Self- T est Results Log p age in non-volatile memory . The host may use Log Sens[...]

22 Cheetah T10 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 23 6.0 Physical/electrical specifications This section provides information relating to the physical and electrical char acteristics of the drive. 6.1 AC power requirement s None. 6.2 DC power requirement s The volt age and current requireme nts for a single drive are shown below . V alues indicate d apply at [...]

24 Cheetah T10 SAS Product Manual, Rev. A 0.15A DC and 0.2A AC 12V max st art current margin added.. 0.15A DC and 0.2A AC 12V max st art current margin added. [1] Measured with average reading DC ammeter or equivalent sampling scope. Inst antaneous +12V current peaks will exceed these values. Power supply at nominal volt a ge. N (number of driv es [...]

Cheetah T10 SAS Product Manual, Rev. A 25 Degrees C ambient . [2] For +12 V , a –10% tolerance is allowed durin g initial spindle st art but must return to ±5% before reaching 15,000 RPM. The ±5 % must be maint ained af ter the dr ive signifies that it s power-up sequence has been completed and th at the dr ive is able to acce pt selectio n by [...]

26 Cheetah T10 SAS Product Manual, Rev. A Figure 2. T ypical ST33 0055 5SS drive current profile s[...]

Cheetah T10 SAS Product Manual, Rev. A 27 Figure 3. T ypical ST3146755SS drive current pr ofile s[...]

28 Cheetah T10 SAS Product Manual, Rev. A Figure 4. T ypical ST37 3355 SS drive current profiles[...]

Cheetah T10 SAS Product Manual, Rev. A 29 6.3 Power dissip ation ST3300555SS in 3 Gbit operation T ypical power dissip ation under idle conditions in 3Gb operation is 14.22 watt s (48.52 BTUs per hour). T o obtain ope r ating power for typical random read operatio ns, refer to the following I/O rate curve (see Figure 5 ). Locate the typical I/O ra [...]

30 Cheetah T10 SAS Product Manual, Rev. A ST3146755SS in 3 Gbit operation T ypical power dissip ation under idle conditions in 3Gb operation is 10.74 watt s (36.65 BTUs per hour). T o obtain ope r ating power for typical random read operatio ns, ref er to the following I/ O rate curv e (see Figur e 5 ). Locate the typical I/O ra te for a drive in y[...]

Cheetah T10 SAS Product Manual, Rev. A 31 ST373355SS in 3 Gbit operation T ypical power dissipation under idle conditions in 3Gb operation is 9.13 watt s (31.15 BTUs per hour). T o obtain ope r ating power for typical random read operatio ns, refer to the following I/O rate curve (see Figure 5 ). Locate the typical I/O ra te for a drive in y our sy[...]

32 Cheetah T10 SAS Product Manual, Rev. A 6.4 Environment al limits T emperature and hum idity values experi enced by the driv e must be such that condens ation does not occur on any drive part. Altitude and atmospheric pressure specif icat ions are referenced to a st andard day at 58.7°F (14.8°C). M aximum wet b ulb temperat ure is 82°F (28°C)[...]

Cheetah T10 SAS Product Manual, Rev. A 33 6.4.2 Relative humidity The values below assume that no condensation on the dr ive occurs. a. Operating 5% to 95% non-condensing re lative humidity with a maximum gradient of 20% per hour . b. Non-operatin g 5% to 95% non-condensing relative humidity . 6.4.3 Effective altitude (sea level) a. Operating –1,[...]

34 Cheetah T10 SAS Product Manual, Rev. A d. Packaged Disc drives shipped as loose load (not palletized) general freight will be packaged to withs tand drop s from heights as define d in the table below . For additional det ails refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-00 1 (over 100 lbs/45 Kg). Drives packaged in si[...]

Cheetah T10 SAS Product Manual, Rev. A 35 6.4.4.2 Vibration a. Operating—normal The drive as inst alled for normal operation, shall comply with the complete sp ecified performance while subjected to continuous vi bration not exceeding 10-500 Hz @ 0.5 G ( zero to peak) Vibr ation may be applied in the X, Y , or Z axis. Operating normal translation[...]

36 Cheetah T10 SAS Product Manual, Rev. A 6.4.7 Acou stics Sound power during idle mode shall be 3.6 bels typica l when measured to ISO 7779 specification. Sound power while operating shall be 4.3 bels typica l when measured to I S O 7779 specification. There will not be any discret e tones more than 10 dB above the masking noise on typical drives [...]

Cheetah T10 SAS Product Manual, Rev. A 37 7.0 Defect and erro r management Seagate continues to use innova t ive technologies to manage defect s and errors. These technologies are designed to increase dat a integrity , perform drive self-mainten ance, and validat e proper drive operation. SCSI defect an d error mana gement involve s drive internal [...]

38 Cheetah T10 SAS Product Manual, Rev. A The drive firmware er ror recovery algorithms consists of 1 1 levels for read recoveries and five levels for write. Each level may consist of multiple st eps, where a step is defined as a re cove ry function involving a single re- read or re-write atte mpt. The maximum level use d by the drive in LBA recove[...]

Cheetah T10 SAS Product Manual, Rev. A 39 7.3 SAS system errors Information on the reporting of operation al errors or faults a c ross the interface is given in the SAS Interface Manual . The SSP Response retur n s information to the host about numerous kinds of errors or faults. Th e Receive Diagnostic Results reports the result s of diagnostic op[...]

40 Cheetah T10 SAS Product Manual, Rev. A 7.6 Deferred Auto-Reallocation Deferred Auto -Reallocati on (D AR) simplifies reallocation algorithms at the system level by allowing the drive to reallocate unreadable locations on a subsequent writ e command. Sites are marked for DAR during read oper - ations perfo rmed by the dr ive. When a write command[...]

Cheetah T10 SAS Product Manual, Rev. A 41 8.0 Inst allation Cheetah disc drive installation is a plug- and-play proc ess. There ar e no jumpers, switches , or terminato rs on the drive. SAS drives are designed to be used in a host system that provides a S AS-compatible backplane with bays designed to accomodate the drive. In such systems, the host [...]

42 Cheetah T10 SAS Product Manual, Rev. A 8.2 Cooling Cabinet cooling must be desig ned by the customer so that the a mbient temperat ure immediately surrounding the drive will not exceed temperat ure conditions specified in Section 6. 4. 1, "T emperature." The rack, cabinet, or drawer envir o nment for the driv e must provide he at remov[...]

Cheetah T10 SAS Product Manual, Rev. A 43 8.3 Drive mounting Mount the drive usin g the bottom or side mounting hole s . If you mou nt the drive using th e bottom holes, ensure that you do not physically d istort the d rive by at tempting to mount it on a stif f, non-flat surface. The allowable mountin g surface stif fness is 80 lb/i n (14.0 N/mm).[...]

44 Cheetah T10 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 45 9.0 Interface requirements This section partially descr ibe s the inter face re quir em ent s as implemented on Cheet ah drives. Additional infor - mation is provided in the SAS Interface Manual (p art number 1 00293071). 9.1 SAS features This section lists the SAS-specific f eatures supported by Cheetah dr[...]

46 Cheetah T10 SAS Product Manual, Rev. A 9.2 Dual port support Cheetah SAS drives have two independent port s. These ports may be connected in the same or di f ferent SCSI domains. Each drive port has a unique SAS address. The two port s run at the same link rate. The first port to successfully complete sp eed negotiation sets the link rate suppor[...]

Cheetah T10 SAS Product Manual, Rev. A 47 9.3 SCSI commands supported Ta b l e 8 lists the SCSI commands sup ported by Cheetah d r ives. T able 8: Commands supported by Cheet ah T10 SAS family drives Command name Command code Supported Change Def inition 40h N Compare 39h N Copy 18h N Copy and V erify 3Ah N Format Unit [1] 04h Y DPRY bit supported [...]

48 Cheetah T10 SAS Product Manual, Rev. A Non-medium Erro r page (06h) Y Pages Supported list (00h) Y Read Error Counter p age (03h) Y Read Reve rse Error Coun ter page (04h) N Self-test Results p age (10h) Y Backgrou nd Medium Sc an page (15h) Y S tart-stop Cycle Co unter page (0Eh) Y T emperature page ( 0Dh) Y V erify Error C ounter page (05h ) Y[...]

Cheetah T10 SAS Product Manual, Rev. A 49 Reassign Bl ocks 07h Y Receive Diagnostic Results 1Ch Y Supported Diagnostics p a ges (00h) Y T ranslate pa ge (40h) Y Release 17h Y Release (10) 57h Y Request Sense 03h Y Actual Retry Count bytes Y Extended Sense Y Field Pointer bytes Y Reserve 16h Y 3rd Party Reserve Y Extent Reservation N Reserve (10) 56[...]

50 Cheetah T10 SAS Product Manual, Rev. A [1] Cheetah drives can format to 512, 520, 524, or 528 bytes per logical block. [2] W arning. Power loss during flash programm ing can result in firmware corrup tion. This usually makes the drive inoperable. [3] Reference Mode Se nse command 1Ah for mode pages suppo rted. [4] Y = Y es. Command is supporte d[...]

Cheetah T10 SAS Product Manual, Rev. A 51 9.3.1 Inquir y da ta Ta b l e 9 lists the Inquiry command data th at the drive should return to the initiator per the format given in the SAS Interfac e Manual . T able 9: Cheet ah T10 SAS inquiry data * Cop yright year (changes wi th actual year). ** SCSI Revision support. See the appropria te SPC release [...]

52 Cheetah T10 SAS Product Manual, Rev. A Select command before the dr ive a chieves op er ating speed a nd is “r eady .” An attempt to do so result s in a “Check Condition” status. On drives requiring unique sa ved values, the required unique saved values are stored into the saved val - ues storage location on the media prior to shipping t[...]

Cheetah T10 SAS Product Manual, Rev. A 53 T able 10: ST3300555SS Mode Sense dat a MODE DATA HEADER: 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR: 22 ec b2 5c 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 ff ff [...]

54 Cheetah T10 SAS Product Manual, Rev. A T able 1 1: ST3146755SS Mode Sense dat a MODE DATA HEADER: 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR: 11 17 73 30 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 ff ff[...]

Cheetah T10 SAS Product Manual, Rev. A 55 T able 12: ST373355SS Mode Sens e dat a MODE DATA HEADER: 03 fa 00 10 00 00 00 08 BLOCK DESCRIPTOR: 08 8b b9 98 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff ff CHG 81 0a ff ff 00 00 00 00 ff 00 ff ff DEF 82 0e 00 00 00 00 00 00 00 00 01 3a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 ff ff [...]

56 Cheetah T10 SAS Product Manual, Rev. A 9.4 Miscellaneous operating features and conditions Ta b l e 13 lists various features and conditions. A “Y” in the support column indica tes t he feature or condition is supported. An “N” in the support column indicates the feature or co ndition is not supported. T able 13: Miscellaneous features S[...]

Cheetah T10 SAS Product Manual, Rev. A 57 9.4.1 SAS physical interfac e Figure 16 shows the location of the SAS device connecto r J1. Figures 17 and 18 provide th e dimen sions of the SAS device. Details of the physical, electrical, an d logical characteristics are provided wi th in this section. The operational aspects of Seagate’ s SAS drives a[...]

58 Cheetah T10 SAS Product Manual, Rev. A Figure 17. SAS connector dimensions C OF DATUM B L 5.08 1.27 (6X) 1.27 (14X) 15.875 0.35MIN 15.875 33.43 0.05 B 4.90 0.08 0.84 0.05 (22X) 0.15 B P15 P1 S7 S1 SEE Detail1 0.30 0.05 (4X) 4.00 0.08 0.15 D 0.30 0.05 (2X) 41.13 0.15 B B C C A A 0.20 B 42.73 REF. C OF DATUM D L 1.10 R0.30 0.08 (4X) 2.00 (3X) 5.08[...]

Cheetah T10 SAS Product Manual, Rev. A 59 Figure 18. SAS connector dimensions 9.4.2 Physical characteristic s This section defines phys ical interface co nnector . 9.4.3 Connector requirement s Contact your preferred connector manufacturer for ma ti ng part informa tion. Part numbers fo r SAS connecto rs will be provided in a futu re revision of th[...]

60 Cheetah T10 SAS Product Manual, Rev. A 9.4.4 Electrical description SAS drives use the device connector for: • DC power • SAS interface • Activity LED This connector is des ign ed to eit he r plu g directly into a backpanel or accept cables. 9.4.5 Pin descrip tions This section provides a p in-out of the SAS device and a desc rip tion of t[...]

Cheetah T10 SAS Product Manual, Rev. A 61 9.4.6 SAS transmitters an d rece iv ers A typical SAS differential coppe r transmitter and receiver pa ir is shown in Figure 19 . The receiver is AC cou - pling to eliminate ground shif t noise . Figure 19. SAS tr ansmitters and receivers 9.4.7 Powe r The drive receives power (+5 volts and +12 volts) throug[...]

62 Cheetah T10 SAS Product Manual, Rev. A The Ready LED Out signal is designed to pu ll down t he cath ode of an LED. The anode is att ached to the proper +3. 3 volt su pply thro ugh an ap prop riat e cur ren t limitin g resist or . T he L ED an d th e cu rrent lim iting resis - tor are ext ernal to the d rive. See T able 17 for the output ch aract[...]

Cheetah T10 SAS Product Manual, Rev. A 63 9.5.2.1. 2 Receive ey e mask Figure 20 describes the r eceive eye mask. This eye mask applie s to jitter af ter the application of a single pole high-p a ss frequency-weighting function that prog ressively attenuates jitter at 20 dB/decade below a frequency of ((bit r ate) / 1.66 7). Figure 20. Receive eye [...]

64 Cheetah T10 SAS Product Manual, Rev. A The leading and tra iling edge slopes of figure 20 shall b e preserved. As a resu lt the amplitude value of Z1 is less than that given in tab le 20 and Z1 TOL and Z1 OP shall be defined from thos e slopes by the following equa - tion: where: Z1 TO L is the value for Z1 to be used for the tolerance masks; an[...]

Cheetah T10 SAS Product Manual, Rev. A 65 9.5.2.2 T ransmitter signa l characteristics T able 19 specifies the s ignal requ irements at the tra nsmi tter end of a TxRx connecti on as measured in to the zero-length test load. All specifications are base d on differential measu rements. The OOB sequence is performed at signal volt age levels correspo[...]

66 Cheetah T10 SAS Product Manual, Rev. A 9.5.2.3 Receiver si gn a l ch ara ct eri st ic s T able 20 defines the complia nce point requirem ents of the si gnal at the receiver en d of a TxRx connection as measured into th e test loads specified in figur e 23 and figure 24 . 9.5.2.3. 1 Jitter T able 21 defines the maximum allowable jitter . T able 2[...]

Cheetah T10 SAS Product Manual, Rev. A 67 9.5.2.3.2 Receiver jitte r tole ra nc e T able 22 defines the amount of jitter the receiver shall toler a te . 9.5.2.3.3 Compliant jitter test p attern (CJTP A T) The CJTP A T within a compliant pr otocol frame is used for all jitter testing unless otherwise specified. See the SAS Interface Manual for defin[...]

68 Cheetah T10 SAS Product Manual, Rev. A 9.5.2.4 Electrical TxRx conne ctions TxRx connec tions may be d ivided into TxRx connecti on segments. In a single TxRx connection individua l TxRx connection segment s may be formed from dif ferin g media and material s, including traces on printed wir - ing boards and optical fibers. This subcla use appli[...]

Cheetah T10 SAS Product Manual, Rev. A 69 A combination of a zero-leng th test load and the transm itter compliance transfer function (TCTF) test load methodology is used for the specificat ion of transmitter char acteristics. This methodology specifies the trans - mitter signal at the test points o n the required te st l oads. The transmitter uses[...]

70 Cheetah T10 SAS Product Manual, Rev. A Figure 24 shows the zero-length test load . Figure 24. Zero-length test load Figure 25 shows an ISI loss example at 3.0 Gbps. Figure 25. ISI loss examp le at 3.0 Gbps Figure 26 shows an ISI loss example at 1.5 Gbps. Figure 26. ISI loss examp le at 1.5 Gbps Tx + Tx - 10 nF 50 ohm 50 ohm P r obe point s SAS i[...]

Cheetah T10 SAS Product Manual, Rev. A 71 9.5.2.5 Receiver char acteristics The drive receiver is A.C. coupled. The receive networ k ter minate s th e TxRx conne ction by a 1 00 ohm eq uiva - lent impedance as specified in table 23 . The receiver op erates within a BER of 10 -12 when a SAS signal with valid voltage and timing characteristics is del[...]

72 Cheetah T10 SAS Product Manual, Rev. A[...]

Cheetah T10 SAS Product Manual, Rev. A 73 10.0 Seagate T echnolo gy support services Online services Internet www .seagate.com for information a bout Seagate p roducts an d services. Wor ldwide support is availab le 24 hours daily by e-mail for you r qu es tio ns. Presales Support: www .sea g ate.com/support/email/ email_presales.html or Presales@S[...]

74 Cheetah T10 SAS Product Manual, Rev. A Dat a Recovery Services Seagate offe rs data recover y services for all format s and all brands of storage media. Our Data Recovery Ser - vices labs are currently located in North America. T o speak with a case management represent ative, call 1-800-475-0143. Additional information, includ ing an onlin e re[...]

Cheetah T10 SAS Product Manual, Rev. A 75 European support services For presales and technical support in Euro pe, dial t he Seagate Service Center toll-free number for your spe - cific location. If your loc ation is no t listed here, dial our presales and technical sup port call center at +1-405- 324-4714 from 8:00 A . M . to 1 1:45 A . M . and 1:[...]

76 Cheetah T10 SAS Product Manual, Rev. A Africa/Middle East support services For presales and tech nical support in Africa and the Mi ddle East, dial our presales an d technical support call center at +1-405- 324-4714 from 8:00 A . M . to 1 1:45 A . M . and 1:00 P . M . to 5:00 P . M . (C entral Europ e time) Mo n - day through Friday . The presal[...]

Cheetah T10 SAS Product Manual, Rev. A 77 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 desig n 7 adaptive caching 56 AFR 9 air cleanliness 35 air flow 42 illustrat[...]

78 Cheetah T10 SAS Product Manual, Rev. A environmen t 42 environmenta l limits 32 requirements 15 environmenta l 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 reallocation 8 Format command execution time 12 function complete, code 00 45 not supporte d,[...]

Cheetah T10 SAS Product Manual, Rev. A 79 N noise audible 3 noise immunity 25 non-operating 33 , 35 temperature 32 non-operating vibration 35 O office enviro nment 35 operating 33 , 35 operating environme n t 16 option selection 60 out-of-plane distortion 43 P package size 34 package test specif ication 5 packaged 34 parameter round ing 56 PCBA 43 [...]

80 Cheetah T10 SAS Product Manual, Rev. A 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 re sponse codes 45 Function complete 00 45 Function not supported 05 45 Funct[...]

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Seagate T echnology LLC 920 Disc Drive, Scotts V alley , California 95066-4544, USA Publication Number: 1004336 94, Rev . A, Printed in USA[...]