Seagate ST31000640SSIM manuale d’uso

Product Manual Barracuda ® ES.2 SAS 100496298 Rev . G November 2010 ST31000640SS ST3750630SS ST3500620SS[...]

© 2010 Seagate T echnology LLC. All right s reserved. Publication number: 1004 96298, Rev . G, November 2010 Seagate, Seagate T echnolog y and the W ave logo are registered tradema rks of Seagate T echnology LLC in the United S tates an d/or other cou ntries. Barracud a ES.2 and SeaT ools are eithe r trademarks or registered trademarks of Seagate [...]

Barracuda ES.2 SAS Product Ma nual, Rev. G (Draft 1) i Seagate Technology Suppor t Services iii 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Standards, compliance and referen ce docu ments . . . . . . . . . . . . . . . . . . . . . . . [...]

ii Barracuda ES.2 SAS Product Manual, Rev. G (Dr aft 1) 6.4.3 Effective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.4.4 Shock and vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.4.5 Acoustics . . . . . . . . . . . . . . . . . . .[...]

Barracuda ES.2 SAS Product Manual , Rev. G (Draft 1) iii For information regarding on line support and services, visit http://www .sea gate.com/www/en-us/ about/contact_u s/ Available ser vices include: • Presales & T echnical support • Global Support Services telephone nu mbers & business hours • Authorized Service Centers For inform[...]

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Barracuda ES.2 SAS Prod uct Manual, Rev. G 1 1.0 Scope This manual describes Seagate T echno logy ® LLC, Barracuda ® ES.2 SAS (Serial Attached SCSI) disk drives. Barracuda ES.2 drives support the SAS Pr otocol specifications to the extent described in this manual. The SAS Interface Manual (part number 1002 93071) describes the gene ral SAS charac[...]

2 Barracuda ES.2 SAS Product Manual, Rev. G[...]

Barracuda ES.2 SAS Prod uct Manual, Rev. G 3 2.0 S t andards, 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 equipm ent to provide a deq uate power and e nvironment for optimum perfor mance and compliance with applicable in[...]

4 Barracuda ES.2 SAS Product Manual, Rev. G 2.2 Compliance 2.2.1 Elec tromagnetic compliance Seagate uses an in dependent laboratory to confirm comp liance with the directives/st andards for CE Marking and C-T ick Markin g. The drive was teste d in a repr esen t ative system for typical applications. The selected sys- tem represe nts the most pop u[...]

Barracuda ES.2 SAS Prod uct Manual, Rev. G 5 2.3 Reference document s SCSI Commands Reference Manual Seagate par t n umber: 100293068 SAS Interface Manua l Seagate part nu mber: 100293071 Applicable ANSI SAS documents SFF-8323 3.5” Drive Form Factor with Serial Connector SFF-8460 HSS Backplane Design Guid elines SFF-8470 Multi Lane Copper Conn ec[...]

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Barracuda ES.2 SAS Prod uct Manual, Rev. G 7 3.0 General description Barracuda ES.2 drives combine T unneling Magnetoresis tive (TMR) heads and a Serial Attached SCSI (SAS) interface to pr ovide high performance, high capacity dat a storage for a variety of systems including eng ineer- ing workstations, networ k servers, mainframes, and su percompu[...]

8 Barracuda ES.2 SAS Product Manual, Rev. G 3.1 St andard features Barracuda ES.2 SAS drives have the following st andard features: • Perpendicu lar recording technology • 1.5 / 3 Gbit Serial Att ached SCSI (SAS) interface • Integrated dual port SAS controller • Support for SAS exp anders and fanout adapter s • Downloadable firmware using[...]

Barracuda ES.2 SAS Prod uct Manual, Rev. G 9 3.5 Formatted cap acities S tandard OEM models are for matted to 512 bytes pe r blo ck. The block size is select able at format time and must be a multiple of 4 bytes. Users having the necess ary equipment may m odify the data bl ock size before issuing a format command and obtain dif ferent formatted ca[...]

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Barracuda ES.2 SAS Produc t Manual, Rev. G 11 4.0 Performance characteristics This section provides detailed infor mation concerning perfor mance-related ch aracte ristics and features of Barracuda ES.2 SAS drives. 4.1 Internal drive characteristics ST31000640SS ST3750630SS ST3500620SS Drive capacity 1,000 750 500 Gbytes (formatted, rounded value) [...]

12 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 4.2.2 Format command ex ecu ti o n tim e (min u te s ) Execution time measured fr om receipt of the last byte of the Command Descri ptor 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[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 13 4.4 Prefetch/multi-segmented cache control The drive provides a prefetch (read look-ahead) and mu lti-segmented cach e control algorithms that in many cases can enhance system performance. Cache refers to the drive buf fer storage sp ace when it is used in cache operations. T o select this feature, the [...]

14 Barracuda ES.2 SAS Pr oduct Manual, Rev. G If read caching is en abled (RCD=0), then data written to t he medium is ret ained in the cache to be made avail- able for fu ture read cache hit s. The same buf fer sp ace and segment ation is used as set up for read functions. The buf fer segment ation scheme is set up or changed independently , havin[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 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, environmenta l requirem en ts and drive mou n tin g con st ra i nts. 5.1 Error rates The error rates st ated in this ma[...]

16 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 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 dete cting an initial seek error , the drive automatically perfor ms an er ror recovery process. If the error recovery process fails, a seek positioning error (E rror code = 15h or 0[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 17 5.2.4 S.M.A.R.T . S.M.A.R.T . is an acronym for Self-Monitoring Analysis and Re porting T e chnology . This technology is intended to recognize conditions that indicate imminen t drive failu re and is desig ned to provide suf ficient warning of a failure to allow you to back up the dat a before an actua[...]

18 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Error rate is the number of er rors per operation . The algori thm 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 th e number of errors exceeds the th reshold before the interval expires, the err or rate is considered to be un accepta[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 19 The most thorough op tion is the extended test that per f orms various tes ts on the driv e a nd sca n s ev er y lo gic al block address (LBA) of the drive. The short test is ti me-restricted and limited in len gth—it does not scan the entire media surface, but does some funda ment al test s and scans[...]

20 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Each test consists of three segment s: an electrical te st segment, a ser vo te st seg men t, an d a read /ver ify scan segment. Short test (Function Code: 001b) The purpose of the sh ort test is to pr ovide a time-limited test that tests a s much of the drive as possible within 120 seconds. Th e short [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 21 procedure. Seagate will pay for transpo rting the repair or replacement item to the customer . For more detailed warranty information, refer to the st andard terms and conditions of purchase for Seagate products on your pur- chase docume n tation. The remaining warranty for a partic ular drive can be de[...]

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Barracuda ES.2 SAS Produc t Manual, Rev. G 23 6.0 Physical/electrical specifications This section provides information relating to the physical and electrical char acter istics of the drive. 6.1 AC power requirement s None. 6.2 DC power requirement s The volt age and current requirement s for a single drive are shown be low . V alues indicated appl[...]

24 Barracuda ES.2 SAS Pr oduct Manual, Rev. G [1] Measured with average reading DC ammeter or equivalent sampling scope. Inst anta neous +12V current peaks will exceed these values. Power supply at nominal volt a ge. N (number of driv es tested) = 6, 35 Degrees C ambient . [2] For +12 V , a –10% tolerance is allowed during initial spindle st art [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 25 [4] This condition occurs after OOB and S peed Negotiat ion co mpletes but befo re the drive has receive d the Notify S pinup primitive. [5] See paragrap h 6.2.1, "Cond ucted noise immunity ." S pecified voltag e tolerance includes ripple, noise, and transient response. [6] During idle, the d [...]

26 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Figure 2. T ypical ST31 0006 40SS driv e +5V and +1 2V current profiles Figure 3. T ypical ST375063 0SS driv e +5V and +12V cu rrent profiles[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 27 Figure 4. T y pical ST3500620SS drive +5V and +12V current profiles 6.3 Power dissip ation T ypical power dissipation under idle conditions in 3Gb operation is 8.73 wa tt s (29.79 BTUs per hour). T o obtai n operating power for typical random read oper atio ns, refer to the following I/O rate curve (see[...]

28 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Figure 5. ST31000640SS (3 Gbit) DC cu rrent an d power vs. inp ut/output operations pe r second Figure 6. ST3750630SS (3 Gbit) DC curren t and power vs. input/output operations per seco nd Figure 7. ST3500620SS (3 Gbit) DC curren t and power vs. input/output operations per seco nd[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 29 6.4 Environment al limit s T emperature and humidity values exper ienced by the driv e must be such that condens ation does not occur on any drive part. Altitude and atmospheric pressure specif ications are referen ced to a standard day at 58.7° F (14.8°C). M aximum wet bu lb temperat ure is 82°F (2 [...]

30 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 6.4.2 Relative humidity The values below assume that no condensation on the drive occu rs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 20% per hour . b. Non-operatin g 5% to 95% non-condensing relative humidity . 6.4.3 Effe ctive altitude (sea level) a. Operating ?[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 31 d. Packaged Disk 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 3019 0-001 (under 100 lbs/45 kg) or 30191-001 (o ver 100 lbs/45 Kg). Drives packaged [...]

32 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 6.4.4.2 Vibration a. Operating—normal The drive as ins talled for normal ope ration, shall comply with the complete sp ecified performance while subjected to continuous vi bration not exceeding 5 - 22 Hz 0.25 Gs, Lim ited displace ment 22 - 350 Hz 0.5 Gs 350 - 500 Hz 0.25 Gs Vibr ation may be applied [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 33 exposed to an ambient re lative humidity g reater than 95%. Materials used in cabinet fabrication, such as vulca- nized rubber , that can outgas corrosive compounds should be minimized or eliminat ed. The useful life of any electronic equip ment may be extende d by replacing ma terials near circuitry wi[...]

34 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 6.5 Mechanical specifications Refer to Figure 9 for det ailed physical dim ensions. See Sec tio n 8.3 , “Dr ive mo un ting. ” Figure 9. Physical d imensions Height: 1.028 inches 26.1 1 mm Width: 4.010 inches 101.85 mm Depth: 5.787 inches 146.99 mm Wei ght: ST31000640SS ST3750630SS ST3500620SS 1.53 p[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 35 7.0 Defect and erro r management Seagate continues to use innova tive technologies to manage defect s and errors. These techno logies are designed to increase dat a integrity , perform drive self-maintenance, an d validat e proper drive opera tio n. SCSI defect an d error mana gement involve s drive int[...]

36 Barracuda ES.2 SAS Pr oduct Manual, Rev. G The drive firmware er ror recovery algorithms consist s 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 used by the drive in LBA re[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 37 7.3 SAS system errors Information on the reporting of operational errors or fault s across the interface is given in the SAS Interface Manual . The SSP Response returns info rmation to the host about num erous kinds of errors or faults . The Receive Diagnostic Results reports the result s of diagnostic [...]

38 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 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 comma nd. Sites are marked for DAR during r ead oper- ations perfo rmed by the dr ive. When a write co[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 39 8.0 Inst allation Barracuda ES.2 disk drive inst allation is a plug -and-play process. Ther e are no jumpers, switches, or te rmina- tors 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 accommo date the drive. In su ch sys[...]

40 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 8.2 Cooling The host enclosure must dissipate he at from the dr ive . Y ou sh ou ld co nf irm that the host encl osure is designed to ensure that the drive op erates within the temp eratur e measurement guideline s described in Section 6.4.1. In some cases, forced airflo w may be required to keep te mpe[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 41 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 stiff, non-flat surface. The allowable mountin g surface stif fness is 80 lb/i n (14. 0 N/[...]

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Barracuda ES.2 SAS Produc t Manual, Rev. G 43 9.0 Interface requirements This section partially describes th e interface requir ements as implemented on Barr acuda ES.2 drives. Addi - tional information is provided in the SAS Interface Manual (p art number 10 0293071). 9.1 SAS features This section lists the SAS-sp ecific features supported by Barr[...]

44 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 9.2 Dual port support Barracuda ES.2 SAS drives have two in dependent ports. These port s may be connected in the same or differ- ent SCSI domains. Each drive port has a uni que SAS address. The two port s run at the same link rate. Th e first port to successfully complete speed neg otiation sets the li[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 45 9.3 SCSI commands supported T able 8 lists the SCSI command s sup ported by Barracuda ES.2 drives. T able 8: Commands supported by Barrac uda ES.2 SAS fa mily 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 bi[...]

46 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Non-medium Error p age (06h) Y Pages Supported list (00h) Y Read Error Counter page (03h) Y Read Reve rse Error Coun ter page (04h) N Self-test Results page (10h) Y Backgrou nd Medium Sc an page (15h) Y S tart-stop Cycle Co unter page (0Eh) N T emperature page (0Dh) Y V erify Error C ounter page (05h ) [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 47 Reassign Bl ocks 07h Y Receive Diagnostic Results 1Ch Y Supported Diagnostics pages (00h) Y T ranslate page (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) 5[...]

48 Barracuda ES.2 SAS Pr oduct Manual, Rev. G [1] Barracuda ES.2 drives can format to 51 2, 520, 524, or 528 bytes per logical block. [2] Wa r n i n g . Power loss during flash prog ramming can result in firmware corr uption. This usually makes the drive inoperable. [3] Reference Mode Se nse command 1Ah for mode p ages supported. [4] Y = Y es. Comm[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 49 9.3.1 Inquir y da ta T able 9 lists the Inquiry command dat a that the drive sho uld return to the initia tor per the format given in the SAS Interfac e Manual . T able 9: Barracuda ES.2 SAS inquiry dat a * Copyright year (change s with actual year). ** SCSI Re vision suppor t. Ref er to the appropriate[...]

50 Barracuda ES.2 SAS Pr oduct Manual, Rev. G On standard OEM drives, the saved values are taken from the defau lt values list and stored into the saved values storage location on the media prior to shipping. 3. Current valu es Current values are volatile values being used by the drive to control it s operation. A Mode Select command can be used to[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 51 9.3.2.1 ST3100064 0SS Mode Sen se data MODE DATA HEADER: 01 2e 00 10 00 00 00 08 BLOCK DESCRIPTOR: 74 70 6d b0 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff f f CHG 81 0a ff ff 00 00 00 00 ff 00 ff f f DEF 82 0e 00 00 00 00 00 00 00 00 01 3 a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 [...]

52 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 9.3.2.2 ST3750630SS Mode Sense da ta MODE DATA HEADER: 01 2e 00 10 00 00 00 08 BLOCK DESCRIPTOR: 57 54 66 f0 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff f f CHG 81 0a ff ff 00 00 00 00 ff 00 ff f f DEF 82 0e 00 00 00 00 00 00 00 00 01 3 a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 ff[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 53 9.3.2.3 ST3500620SS Mode Sense da ta MODE DATA HEADER: 01 2e 00 10 00 00 00 08 BLOCK DESCRIPTOR: 3a 38 60 30 00 00 02 00 MODE PAGES: DEF 81 0a c0 0b ff 00 00 00 05 00 ff f f CHG 81 0a ff ff 00 00 00 00 ff 00 ff f f DEF 82 0e 00 00 00 00 00 00 00 00 01 3 a 00 00 00 00 CHG 82 0e 00 00 00 00 00 00 00 00 ff[...]

54 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 9.4 Miscellaneous operating features and conditions T able 10 lists various fe atures and conditions. A “Y” in th e support column indicates t he featur e or condition is supported. An “N” in the support column indicates the feat ure or condition is not supported. T able 10: Miscellaneous feat u[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 55 9.4.1 SAS p hysical interface Figure 12 shows the location of the SAS device c onnector J1. Figures 13 and 14 provide the dimensions of the SAS device. Details of the physical, electrical, an d logical characteristics ar e provided wi thin this section. The operational aspects of Seagate’ s SAS drives[...]

56 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Figure 13. SAS connector d imensions 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)[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 57 Figure 14. SAS connector d imensions 9.4.2 Phy sical characteristics This section defines phys ical interface co nnector . 9.4.3 Conn ector requirement s Contact you r preferred connecto r manuf acturer for mating part in formation. The SAS device connector is illu strated in Figures 13 and 14. 6.10 Det[...]

58 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 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 an d a de sc rip tio[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 59 9.4.6 SAS transmitters an d rece iv ers A typical SAS differential copper transm itter and receiver p air is shown in Figure 15. The rece iver is AC cou- pling to eliminate ground shif t noise. Figure 15. SAS transmitters and rec eivers 9.4.7 Powe r The drive receives power (+5 volts and +12 volts) thro[...]

60 Barracuda ES.2 SAS Pr oduct Manual, Rev. G The Ready LED Out signal is designed to pu ll down t he cathode of an LED. The anode is attache d to the proper +3. 3 volt su pply thro ugh an ap prop riat e cur ren t limitin g resist or . The LED and th e cu rren t limitin g resis - tor are ext ernal to the d rive. See T a ble 14 for t he output ch ar[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 61 9.5.2.1. 2 Receive ey e mask Figure 16 describes the receive eye mask. This eye m ask applies to jitter after the application of a single pol e high-p ass frequency-weighting function th at progressively attenuates jitter at 20 d B/decade below a frequency of ((bit r ate) / 1.66 7). Figure 16. Receive e[...]

62 Barracuda ES.2 SAS Pr oduct Manual, Rev. G The leading and trailing edge sl opes of figure 16 shall be preserved. As a result th e amplitude value of Z1 is less than that given in t able 17 and Z1 TOL and Z1 OP shall be defined from those slopes b y the following equa- tion: where: Z1 TOL is the value for Z1 to be us ed for the tolerance masks; [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 63 9.5.2.2 T ransmitter signal characte ristics T able 16 specifies the s ignal requir ements at the tra n smitter end of a TxRx connec tio n as measured into the zero-length test load. All specifications are base d on diff er ential measurement s. The OOB sequence is performed at signal volt age levels co[...]

64 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 9.5.2.3 Receiver si gn a l ch ara ct eri st ic s T able 17 defines the compliance point requireme nts of the signa l at the receiver end of a TxRx connection as measured into the test loads specified in fig ure 19 and figure 20. 9.5.2.3. 1 Jitter T able 18 defines the maximum allowable jitter . T able 1[...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 65 9.5.2.3.2 Receiver jitte r tole ra nc e T able 19 defines the amount of jitter the r eceiver shall tolerate. 9.5.2.3.3 Compliant jitter test p attern (CJTP A T) The CJTP A T within a compliant protocol frame is used for all jitter testing unless ot herwise specified. See the SAS Interface Manual for def[...]

66 Barracuda ES.2 SAS Pr oduct Manual, Rev. G 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 in dividual TxRx connection segment s may be formed from dif fering media and materi als, in cludin g traces on print ed wir- ing boards and optical fibers. This subcla use [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 67 A combination of a zero-leng th test load and the tr ansm itter compli ance transfer function (TCTF) test load methodology is used for the specificat ion of transmitter ch aracteristics. This methodology specifies the trans- mitter signal at the test point s on the r equired test lo ads. The transmitt e[...]

68 Barracuda ES.2 SAS Pr oduct Manual, Rev. G Figure 20 shows the zero-length test load . Figure 20. Zero-length test l oad Figure 21 shows an ISI loss example at 3.0 Gbps. Figure 21. ISI loss example at 3.0 Gbp s Figure 22 shows an ISI loss example at 1.5 Gbps. Figure 22. ISI loss example at 1.5 Gbp s Tx + Tx - 10 nF 50 ohm 50 ohm P r obe point s [...]

Barracuda ES.2 SAS Produc t Manual, Rev. G 69 9.5.2.5 Receiver char acteristics The drive receiver is A.C. coupled. The receive networ k termina tes th e TxRx con ne ction by a 1 00 ohm eq uiva- lent impedance as specified in table 20. The receiver op erates within a BER of 10 -12 when a SAS signal with valid volt age and timing characteristics is [...]

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Seagate T echnology LLC 920 Disc Drive, Scotts V alley, California 95066 -4544, USA Publication Number: 1004 96298, Rev . G[...]