Manuel d'utilisation / d'entretien du produit ST3146954FC du fabricant Seagate
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Cheet ah 15K.4 FC ST3146954FC ST373554FC ST336854FC.
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Cheet ah 15K.4 FC ST3146954FC ST373554FC ST336854FC.
©2005, 2006, Seagate T echnology LLC All right s reserved Publication number: 1003 66896, Rev . B March 2006 Seagate , Seagate T echnology , and the Seagate logo a re registered trademarks of Seagate T echnology LLC. SeaT ools, SeaFONE, SeaB OARD, and SeaTDD are either registered trademarks or trade marks of Seagate T echnol ogy LLC.
Revision st atus summary sheet Revision Date Sheets Affected Rev . A 07/15/05 All. Rev . B (Draft 1) 03/17/06 Pages 25 and 26..
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Cheetah 15K.4 FC Product Manual, Rev. B i Content s 1.0 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Applicable standards and reference documentation .
ii Cheetah 15K.4 FC Product Manual, Rev. B 6.4.1 Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6.4.2 Relative humidit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cheetah 15K.4 FC Product Manual, Rev. B iii 9.6.1 TTL input charac teristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 9.6.2 LED driv er signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv Cheetah 15K.4 FC Product Manual, Rev. B.
Cheetah 15K.4 FC Product Manual, Rev. B v List of Figures Figure 1. Cheetah 15K.4 FC family disc drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Typical ST31 46954FC drive, 2 Gbit, +12V current prof ile .
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Cheetah 15K.4 FC Product Manual, Rev. B 1 1.0 Scope This manual describes Seagate T echnology ® LLC, Chee tah ® 15K.4 FC (Fibre Channel) disc drives. Cheetah 15 K.4 FC drives support the Fibre Channel Arb i trated Loop and SCSI Fibre Channel Protocol specifi - cations to the extent describe d in this manual.
2 Cheetah 15K.4 FC Product Manual, Rev. B.
Cheetah 15K.4 FC Product Manual, Rev. B 3 2.0 Applicable st andards an d reference document ation The drive has been developed as a syst em peripheral to the highest standa rds of design and construction.
4 Cheetah 15K.4 FC Product Manual, Rev. B 2.1.2 Elec tromagnetic compliance Seagate uses an in dependent laboratory to confirm comp liance with the directives/standards for CE Marking and C-T ick Marking. The drive was teste d in a represen tative system for typical applications.
Cheetah 15K.4 FC Product Manual, Rev. B 5 2.2 Reference document s Cheetah 15K.4 FC In stallation Guide Seagate par t number: 100366897 Fibre Channel In terface Manual Seagate p art number: 77767 496 .
6 Cheetah 15K.4 FC Product Manual, Rev. B.
Cheetah 15K.4 FC Product Manual, Rev. B 7 3.0 General description Cheetah 1 5K.4 FC drives combine giant magnetoresisti ve (GMR) heads, partial re sponse/maximum likelihood (PRML) read chan nel electr.
8 Cheetah 15K.4 FC Product Manual, Rev. B 3.1 St andard features Cheetah 15K.4 FC drives have t he following standar d features: • 4-Gbit Fibre Ch annel interface.
Cheetah 15K.4 FC Product Manual, Rev. B 9 3.3 Performance • Programmabl e multi-segmentable cache buf fer • 200 Mbytes/sec maximum instantaneo us data transfers per port • 15k RPM spindle; average latency = 2.
10 Cheetah 15K.4 FC Product Manual, Rev. B change the cap acity it is currently formatted to have. A nu mber in the num ber of block s field that is less than the maximum number of LBAs changes the tota l drive capa city to the value in the block descriptor number of blocks field.
Cheetah 15K.4 FC Product Manual, Rev. B 11 4.0 Performance characteristics This section provides deta iled information concerning performance-related ch aracte ristics and featur es of Cheetah 15K.4 FC drives. 4.1 Internal drive characteristics ST3146954FC ST373554FC ST3 36854FC Drive capacity 146.
12 Cheetah 15K.4 FC Product Manual, Rev. B 4.2.2 Format command ex ecution time (min utes) 4.2.3 General perfo rmance char acteristics 4.3 St a rt/stop time If the Motor S tart option is disable d, the drive becomes ready within 20 se conds after DC power is applied.
Cheetah 15K.4 FC Product Manual, Rev. B 13 the applicable bytes in p age 08h. Prefetch and cache op erations are in dependent features from the st andpoint that each is en abled and disabled indepen d.
14 Cheetah 15K.4 FC Product Manual, Rev. B 4.5.1 Cac hing write data Write caching is a wr ite operati on by the drive that makes us e of a drive buffer storag e area wher e the data to be written to the med ium is stored while the drive performs the Write comm and.
Cheetah 15K.4 FC Product Manual, Rev. B 15 want to configure the cache to provide large volumes of sequential data in a n on-repetitive m anner . In this case, the ability of the cache to “loo k ahead” to the next contiguous segmen ts of sequential data is a good thing.
16 Cheetah 15K.4 FC Product Manual, Rev. B.
Cheetah 15K.4 FC Product Manual, Rev. B 17 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 moun ting constrai nts.
18 Cheetah 15K.4 FC Product Manual, Rev. B 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. Af ter detecting an initial seek error , the drive automatically perfor ms an er ror recove ry process.
Cheetah 15K.4 FC Product Manual, Rev. B 19 5.2.3 Hot plugging the drive Inserting and removing the drive on the FC-AL will interrupt loop operation. The interrup tion occurs when the receiver of the next device in the lo op must synchroni ze to a dif ferent input signal.
20 Cheetah 15K.4 FC Product Manual, Rev. B Performance imp act S.M.A.R.T . attribute data is saved to the d isc so that the events that c aused a pr edictive failure can be rec re - ated. The drive mea sures and saves parameters once every two hours subject to an idle period on the FC-AL bus.
Cheetah 15K.4 FC Product Manual, Rev. B 21 The thermal monitor system generates a warning code of 01-0B01 when the temperature exceeds the speci - fied limit in compliance with the SCSI standa rd. The drive temperature is reported in the FRU code field of mode sense dat a.
22 Cheetah 15K.4 FC Product Manual, Rev. B 5.2.6.2 Imple mentation This section provides all of the information necess ary to imple ment the DST function on this drive. 5.2.6.2. 1 St ate of t he drive pr ior to testin g The drive must be in a read y state before issuing the Send Diagnostic command.
Cheetah 15K.4 FC Product Manual, Rev. B 23 5.2.6.2. 4 Log page entries When the drive begins DST , it creates a new entry in the Self-test Result s Log page. The new entry is created by inserting a new se lf-test parameter block at the begi nni ng of the self-test result s log parameter section of the log page.
24 Cheetah 15K.4 FC Product Manual, Rev. B Product r epair and return information Seagate customer service centers are the only facilities authorized to se rvice Seagate driv es. Seagate does not sanction any third-p arty repair facilities. Any unaut ho rized repair or t ampering with the fa ctory seal voids the warranty .
Cheetah 15K.4 FC Product Manual, Rev. B 25 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 voltag e and current requirements for a single drive are sh‘own below .
26 Cheetah 15K.4 FC Product Manual, Rev. B [1] Measured with average reading DC ammeter . Instantaneous +12V cu rrent peaks will exceed these val - ues.
Cheetah 15K.4 FC Product Manual, Rev. B 27 and 230 I/Os per second for ST37 3554FC andST336854FC models. Current an d power specified at nom - inal voltages. Decreasing +5 volt supply by 5% increases 5 volt current by 2.5%. Decreasing +12 volt sup - ply by 5% increases 12 volt current by 3.
28 Cheetah 15K.4 FC Product Manual, Rev. B Figure 2. T y pical ST3146954FC d ri ve, 2 Gbit, +12V current profile Figure 3. T y pical ST3146954FC d ri ve, 2 Gbit, +5V current profile.
Cheetah 15K.4 FC Product Manual, Rev. B 29 Figure 4. T ypical ST373554FC d rive +12V current profile Figure 5. T ypical ST373554FC d rive +5V current profile.
30 Cheetah 15K.4 FC Product Manual, Rev. B Figure 6. T y pical ST336854FC drive +12V current profile Figure 7. T y pical ST336854FC drive +5V current profile.
Cheetah 15K.4 FC Product Manual, Rev. B 31 6.3 Power dissip ation ST3146954FC T ypical power dissipation under idle conditio ns in 2Gb operation is 13.96 watts (47.6 BTUs per hour). T o obtain operating p ower for typical random read oper atio ns, refer to the following I/O rate curve (see Figure 8 ).
32 Cheetah 15K.4 FC Product Manual, Rev. B ST373554FC T ypical power dissipation under idle conditions in 2Gb operation is 1 1.49 watts (39.21 BTUs per hour). T o obtain operating p ower for typical random read oper atio ns, refer to the f ollowing I/O rate cu rve (see Figure 8 ).
Cheetah 15K.4 FC Product Manual, Rev. B 33 ST336854FC T ypical power dissipation under idle conditions in 2Gb operation is 9.88 watt s (33.7 BTUs per hour). T o obtain operating p ower for typical random read oper atio ns, refer to the following I/O rate curve (see Figure 8 ).
34 Cheetah 15K.4 FC Product Manual, Rev. B 6.4 Environment al limit s T emperature and humidity value s experienced by the driv e must be such that condens ation does not occur on any drive part. Altitude and atmospheric pressure specif ica tions are referenced to a standard da y at 58.
Cheetah 15K.4 FC Product Manual, Rev. B 35 6.4.3 Effec tive altitude (sea level) a. Operating –1,000 to +10,000 feet (–30 5 to +3,048 meters) b. Non-operatin g –1,000 to +40,000 feet (–305 to +1 2,210 meters) 6.4.4 Shoc k and vibration Shock and vibration limits specified in this document are mea sured directly on the drive chassis.
36 Cheetah 15K.4 FC Product Manual, Rev. B d. Packaged Disc drives shipped as loose load (not palletized) general freight will be packaged to withs tand drops from heights as define d in the table below . For additional deta ils refer to Seagate specifications 30190-001 (under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg) .
Cheetah 15K.4 FC Product Manual, Rev. B 37 6.4.4.2 Vibration a. Operating—normal The drive as inst alled for normal operation, sha ll comply with the complete sp ecified performance while subjected to continuous vi bration not exceeding 5-500 Hz @ 0.
38 Cheetah 15K.4 FC Product Manual, Rev. B 6.5 Mechanical specifications The following nominal dimensions are exclusive of the de corative front panel accesso ry . However , dimensions of the front p anel are shown in figure below . Refer to Figure 13 for det ailed mounting configuration dimensions.
Cheetah 15K.4 FC Product Manual, Rev. B 39 7.0 Defect and erro r management The drive, as deliv ered, co mplies with this product manual. The re ad error rates and specified storage ca paci - ties are not dependent upon use of defect m ana gement routines by the host (initiator).
40 Cheetah 15K.4 FC Product Manual, Rev. B Ta b l e 5 equates the read a nd write retry count with the ma ximum possible recovery time for read and write recovery of individual LBAs. The times given do not incl ude time t aken to perform reallocation s.
Cheetah 15K.4 FC Product Manual, Rev. B 41 [1] These va lues are subje ct to change. Setting these retry count s to a value below the defa ul t setting could result in an increased unrecovered error rate which may exceed the value given in this product manual.
42 Cheetah 15K.4 FC Product Manual, Rev. B 7.4 Background Media Scan Background Media Scan (BGMS) is a self-initiated media scan . It performs sequential reads across the entire pack of the media whi le the drive is idle. In RAID arrays, BGMS allows hot spare drives to be scanned for defects prior to b eing put into service by the host syst em.
Cheetah 15K.4 FC Product Manual, Rev. B 43 8.0 Inst allation Cheetah 15K.4 FC dis c drive installation is a plug-a nd-play proce ss. There are no jumpers, swit ches, or termi - nators on the drive. Simply plug the drive into th e host’ s 40-pin Fibre Channel backp anel connector (FC- SCA) — no cables are require d.
44 Cheetah 15K.4 FC Product Manual, Rev. B 8.2 LED connections A connector , J6, is provided on the printed circuit board assembly (PCBA) to provide port bypass, drive a ctive, and drive fault LED connections (see Fi gure 15 ). See Sections 9. 5.7 , 9.
Cheetah 15K.4 FC Product Manual, Rev. B 45 8.2.1 J 6 connector requirement s Recommended mating con nector part number: Berg receptacle, 6 -position, Berg part number 690-006.
46 Cheetah 15K.4 FC Product Manual, Rev. B 8.5 Drive mounting Mount the drive usin g the bottom or side mounting holes . If you mount the drive using the 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.
Cheetah 15K.4 FC Product Manual, Rev. B 47 9.0 Interface requirements This section partially describes the interface r equirements as implemented on Che etah 15K.4 FC drives. Addi - tional information is provided in the Fibre Channel I nterface M anual (part numbe r 77767496).
48 Cheetah 15K.4 FC Product Manual, Rev. B 9.1.2 Fibr e Channel ta sk management functions Ta b l e 7 lists the Fibre Channel SCSI Fibre Ch annel Protocol (FC SCSI FCP) task mana gement functions sup - ported.
Cheetah 15K.4 FC Product Manual, Rev. B 49 9.1.4 Fibre Ch annel port login Ta b l e 9 iden tifies the required conten t of the N_ Port Login (P LOGI) payload fro m an initiator .
50 Cheetah 15K.4 FC Product Manual, Rev. B 9.1.5 Fibr e Channel port login accept Ta b l e 10 identifies the N_Port Login access payload valu es. 9.1.6 Fibr e Channel Process Login Ta b l e 11 lists the process login payload da ta. XX Indicates field s that are not used.
Cheetah 15K.4 FC Product Manual, Rev. B 51 9.1.7 Fibre Channel Process Login Accept Ta b l e 12 lists Cheet ah 15K.4 FC process login accept payload dat a.
52 Cheetah 15K.4 FC Product Manual, Rev. B 9.1.9 Fibr e Channel fabric accept login Ta b l e 14 lists the require d content of the Fab ric Login Accept (A CC) payload from the fabric.
Cheetah 15K.4 FC Product Manual, Rev. B 53 9.1.10 Fibre Channel Arbitrat ed Loop options Ta b l e 15 lists the FC-AL options supported by Cheet ah 15K.4 FC drives. 9.2 Dual port support Cheetah 15K.4 F C drives have two independent FC-AL port s. These ports may be conn ected on independent loops or on the same loop.
54 Cheetah 15K.4 FC Product Manual, Rev. B 9.3 SCSI commands supported Ta b l e 16 lists the SCSI comma nds supporte d by Cheetah 15K.4 FC drives. T able 16: Supp orted commands Command code Su pporte.
Cheetah 15K.4 FC Product Manual, Rev. B 55 Y Control mode page (0Ah) Y Fibre Channel Interface Control page (19h) Y Power control page (1Ah) Y Information exceptions con trol page (1Ch) 1Bh Y S tart u.
56 Cheetah 15K.4 FC Product Manual, Rev. B 37h Y Read defect data 39h N Compare 3Ah N Copy and verify 3Bh Y Write buf fer Y Write combined header and data mode (0) Y Write dat a mode (2) N Download mi.
Cheetah 15K.4 FC Product Manual, Rev. B 57 [1] Cheetah 15K.4 FC drives can format to any multiple of four b ytes per logical block in the range 512 to 704 bytes. [2] W arning. Power loss du ring flash programming can result in firmware corruption. This usua lly makes the drive inoperable.
58 Cheetah 15K.4 FC Product Manual, Rev. B 9.3.1 Inquir y data Ta b l e 17 list s the Inquiry command dat a that the drive should return to the init iator per the format given in the Fibre Channel In terface Manual . * Copyright year (change s with actual year).
Cheetah 15K.4 FC Product Manual, Rev. B 59 On standard OEM drives, the saved values are t aken from the default values list and stored into the saved values storage location on the media prior to shipping. 3. Current value s Current values are volatile values being used by the drive to control it s operation.
60 Cheetah 15K.4 FC Product Manual, Rev. B T able 18: Mode Sens e dat a sa ved, default and changeable values for ST3146954FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 11 17 73 3.
Cheetah 15K.4 FC Product Manual, Rev. B 61 T able 19: Mode Sense data default and changeable values for ST37 3554FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 08 8b b9 98 00 00 02.
62 Cheetah 15K.4 FC Product Manual, Rev. B T able 20: Mode Sense data default and changeable values for ST336854FC drives MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 04 45 dc cc 00 00 02 .
Cheetah 15K.4 FC Product Manual, Rev. B 63 9.4 Miscellaneous operating features and conditions Ta b l e 21 lists various features and conditions. A “Y” in the suppor t column indicates t he feature or condition is supported. An “N” in the support column indicates the featur e or condition is not supported.
64 Cheetah 15K.4 FC Product Manual, Rev. B 9.5 FC-AL physical interface Figure 17 shows the location of the J1 Fibre Channel single conne ction attachment (FC-SCA) and the J6 con - nector . Figure 19 provides the dimensions of th e FC-SCA connector . Figure 20 provides the dimens ions of the J6 connector .
Cheetah 15K.4 FC Product Manual, Rev. B 65 9.5.2 Conn ector requirements The FC-AL SCA device connecto r is illustrated in Figure 19 . The J6 connector is illustrated in Figure 20 .
66 Cheetah 15K.4 FC Product Manual, Rev. B 9.5.3 Electrical description Fibre Channe l drives use the FC -SCA connector fo r: • DC power • FC-AL interface • Drive select (device identification ) • Option selection • Enclosure Serv ices interface This 40-pin connector is designed to plug directly into a backpanel.
Cheetah 15K.4 FC Product Manual, Rev. B 67 9.5.5 FC-AL transmit ters and receivers A typical FC-AL dif ferential copper transmit ter and receiver p air is shown in Figure 21 . The receiver is required to provide the AC coupling to eliminate ground shif t noise .
68 Cheetah 15K.4 FC Product Manual, Rev. B 9.5.8 Active LED Out The Active LED Out signal is driven by the drive as indicated in T able 25 . The Active LED Out signal is designed to pull down th e cathode of an LED. The anode is att ached to the proper +5 volt supply through an app ropriate current lim iting resistor .
Cheetah 15K.4 FC Product Manual, Rev. B 69 9.5.1 1 SEL_6 through SEL_0 ID lines The SEL_6 thro ugh SEL_0 ID lines determine d rive address , and, optionally , for a n Enclosure Services Inter - face. When the Parallel ESI lin e is high, the enclosure backp anel must provide add ress information on the SEL line.
70 Cheetah 15K.4 FC Product Manual, Rev. B T able 27: Arbitrated loop physical address (AL_P A) values AL_P A (hex) SEL ID (hex) Setting (dec) AL_P A (hex) SEL ID (hex) Setting (dec) AL_P A (hex) SEL .
Cheetah 15K.4 FC Product Manual, Rev. B 71 9.5.12 Device control c odes The drive input s a Device Control Code on the DEV_CT RL_ CODE lines at power up to determine the link rate on the Fibre Chan nel ports.
72 Cheetah 15K.4 FC Product Manual, Rev. B 9.6.2 LED driver sig nals Fault and Active LED signals are lo cated in the FC-SCA connec tor (J1) and th rough the in dicator conn ector (J6). See T able 30 for th e output char acteristics of the LED drive s ignals.
Cheetah 15K.4 FC Product Manual, Rev. B 73 Figure 23 provides the data valid ey e diagram fo r typical and m inimum requ irements to recov er data at the specified inte rface erro r rate.
74 Cheetah 15K.4 FC Product Manual, Rev. B.
Cheetah 15K.4 FC Product Manual, Rev. B 75 10.0 Seagate T echnolo gy support services Online services Internet www .seagate.com for informatio n about Seagate product s and services. Worldwide supp ort is available 24 hours daily by e-mail for you r questions.
76 Cheetah 15K.4 FC Product Manual, Rev. B Customer Service Operations W arranty Service Seagate offers wor ldwide custom er support f or Seagate drives. Seagate di stributors, OEMs and other direct customers should contact their Seagate Customer Serv ice Operation s (CSO) repre sentative for warranty - related issues.
Cheetah 15K.4 FC Product Manual, Rev. B 77 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 te chnical support call center at +1-405- 324-4714 from 8:00 A .
78 Cheetah 15K.4 FC Product Manual, Rev. B Asia/Pacific support services For Asia/Pacific presales and technica l 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 .
Cheetah 15K.4 FC Product Manual, Rev. B 79 Index Numerics 12 volt pins 67 3rd party reserve command 57 5 volt pins 67 A Abort Sequence (ABTS) 47 abort task set function 48 AC coupling 67 AC power requ.
80 Cheetah 15K.4 FC Product Manual, Rev. B D data block s ize modifing the 9 data buffer to/from disc media 12 data heads read/write 11 data rate internal 11 data transfer rate 12 data valid eye 73 Da.
Cheetah 15K.4 FC Product Manual, Rev. B 81 received on Po rt A 51 received on Po rt B 51 Force unit access command 55 form factor 8 format 43 Format command execution time 12 Format page (03h) command.
82 Cheetah 15K.4 FC Product Manual, Rev. B SMP = 1 in Mode Select command 63 Synchronized (locked) spindle oper ation 63 Zero latenc y read 63 miscellaneous status support ACA active 63 ACA active, fa.
Cheetah 15K.4 FC Product Manual, Rev. B 83 Prefetch command 55 prefetch/multi-segm ented cache control 12 Pre-Scan 42 preventive maintenan ce 17 private loop FC-AL options 53 Proc Assc 49 Process Acce.
84 Cheetah 15K.4 FC Product Manual, Rev. B LED driver 72 single-unit shipping pack kit 10 SMART 9 , 19 SMP = 1 in Mode Select command 63 SO 49 , 52 spindle brake 8 Stacked connection req.
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Seagate T echnology LLC 920 Disc Drive, Scotts V alley , California 95066-4544, USA Publication Number: 1003668 96, Rev . B, Printed in USA.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Seagate ST3146954FC c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Seagate ST3146954FC - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Seagate ST3146954FC, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Seagate ST3146954FC va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Seagate ST3146954FC, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Seagate ST3146954FC.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Seagate ST3146954FC. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Seagate ST3146954FC ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
