SeagateメーカーST3146356FCの使用説明書/サービス説明書
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Prod uct Ma nu al Chee t ah 15 K.6 FC 10046 5943 Rev . A Oc tober 2007 ST34 50856F C ST33 00656F C ST31 46356F C.
©2007, S e agate T echnology LLC All righ ts reserv ed. Pub lication nu mber: 10046594 3, Rev . A Oc tober 2007 Sea gate, Sea gate T echnology and th e W ave logo are registered trade marks of Seagat e T echnology LLC in the United S t ates and/or other countries.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A i Cont ent s 1.0 S cope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 Ap p lic able standa rds and refe r e nce document ation .
ii Cheetah 15K .6 FC P roduct Man ual, Rev. A 6.4.2 Relat ive humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 6.4.3 E ffective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A iii 9.6 S ignal ch aracteristic s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 9.6.1 T T L in put characteristics . . . . . . . . . . . . . . . .
iv Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A v List o f Figur es Figure 1. Typical S T330065 6FC curren t profil es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 2. Typical S T314635 6FC curren t profil es .
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Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 1 1.0 S cope This ma nual describes Sea gate T echnolog y ® LLC, Cheet ah ® 15K.6 FC (Fibr e Channel ) disc dri ves. Che etah 1 5K . 6 FC dri ves suppo rt the Fibre Ch annel Arbitrat ed Loop and S CSI Fi bre Cha nnel Protocol sp ecifi- catio ns to the extent de scribed in this manual.
2 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 3 2.0 Appl icable st andards an d reference docum ent ation The dr ive has been d evelope d as a system p eriphe ral to the hig hest st and ards of design and constru c tion.
4 Cheetah 15K .6 FC P roduct Man ual, Rev. A 2.1.2 Elect roma gn etic com plia nce Seag ate uses an i ndepend ent lab oratory to confirm comp liance with t he directi ves/stand ards for CE Ma rking and C-T ick Marking. The dr ive was tested in a r epre sent ative system for typica l applications.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 5 Seag ate also h as internal system s in place to en sure ongoing complian ce with the RoHS Direct ive and all laws and regu lations which restr ict chemical conte nt in el ectron ic products.
6 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 7 3.0 General d escription Cheet ah 15K .6 FC drive s provide high perfor man ce, hi gh cap acity dat a stor age for a variety of system s includ- ing engi neering wor kstations, n etwork server s, mainframe s, and supercompute r s.
8 Cheetah 15K .6 FC P roduct Man ual, Rev. A 3. 1 St a ndar d feat u re s Cheet ah 15K.6 FC dr ives have the f ollowing st andard featur es: • Perp endicula r recordi ng techn ology • 4-Gbi t Fibr.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 9 3.3 P erform ance • Prog rammable multi-segme ntabl e cache buf fer • 800 Mb ytes/sec maximum inst antaneous d ata transfers per port • 15k R PM spindle ; average lat ency = 2.
10 Cheetah 15K .6 FC P roduct Man ual, Rev. A • Single- unit shipping pa ck. The driv e is normal ly shipped in bulk p ackaging to provide m aximum prot ection against tra nsit damage. Unit s shipped ind ividuall y requ ire add itio nal pro tection as pr ovi ded by th e single unit shippi ng pack.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 11 4.0 Performance cha racteristics This secti on pr ovides det ailed informa tion concernin g perfor mance-re l a ted charact e risti cs and fe atures of Che etah 15 K .
12 Cheetah 15K .6 FC P roduct Man ual, Rev. A 4.2.2 Format co m mand ex ecution time (minutes) 4.2.3 Ge neral perf orma nce cha racter istics 4.3 St a rt/st op tim e If the Mot or S tar t option is disabled, the drive become s ready with in 20 seconds af ter DC power is app l ie d.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 13 the app li ca ble bytes i n pag e 08h. P refetch and cache oper ations are independent features f r om the stan dpoint that each is enabled a nd disabled .
14 Cheetah 15K .6 FC P roduct Man ual, Rev. A If the numb er o f write dat a logical blo cks excee d the size o f the segm ent b eing wr itten into, wh en th e en d of the segment is re ached , the da.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 15 5.0 Reliabili ty specifi cations The follow ing reliab ility specificat ions assume correct hos t and driv e ope ration al int erface, inclu ding all i nter- face timi ngs, power supply volt ages, environ mental requi remen ts and d r ive m ounting constraint s.
16 Cheetah 15K .6 FC P roduct Man ual, Rev. A 5.1.3 Seek errors A seek err or is defined as a failure of the dri ve to pos ition the heads to the ad dressed track. Aft er detecting an initia l seek error , the drive autom atic ally perf orms an error recover y process.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 17 The Pass-thro ugh st ate is disabled while the drive perfo rms se l f test of the FC interface. T he control l ine for an externa l por t bypass cir cuit rema ins in the Enable By pass state wh i le self test is runnin g.
18 Cheetah 15K .6 FC P roduct Man ual, Rev. A Re po rti ng co ntr ol Reporti ng is controlled by the MRI E bits in the Info rmational E xceptions C ontrol mode page (1Ch). Subject to the repo rting method, th e firmw are will issue to th e ho st an 01-5D xx sense code.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 19 be use d to set this trip point. The default value for this drive is 68°C, how ever , you can set it to any val ue in the range of 0 to 68°C. If you speci fy a tem perature greater than 68°C i n this fi eld, the temperature is roun ded down to 68 °C.
20 Cheetah 15K .6 FC P roduct Man ual, Rev. A • Motor will not spin • Motor will not lock to speed • Servo will not lock on track • Drive cannot rea d configurat i o n tables f rom the disc In these conditions, the d rive respond s to a T est Unit Rea dy command with an 0 2/04/00 or 02/04/03 co de.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 21 The dr ive will report the failur e condition an d LBA (if ap plicable) in the Self-test Re sults Log p a r ameter . The Sense key , A SC, A SCQ, and FRU are used to r eport the failure co ndition. 5.2.6.2.
22 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 23 6.0 Physical/el ect rical specific ations This secti on pro vides infor mation re lating to the physical and electrical chara cteristics of the d rive. 6.1 AC po wer requ i r em ent s None. 6.2 DC po wer requ i r em ent s The voltage and current requir ements for a single d rive a re shown below .
24 Cheetah 15K .6 FC P roduct Man ual, Rev. A [1] Measur ed with average r eading D C ammete r . Instan taneous +12V current peaks will exceed these val - ues. P ower suppl y at nomina l voltage. N ( number of drives tested) = 6, 35 Degr ees C ambient .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 25 347 I/Os per second for ST330065 6F C and S T3146 356FC models. Cu rrent and p ower specified at nomi - nal vol tages. [7] Duri ng idle, the dri ve heads are relocat ed every 60 seconds to a ran dom location within the band fr om three- quar ters to maximum track.
26 Cheetah 15K .6 FC P roduct Man ual, Rev. A Figure 1. T ypical ST3450856FC current profiles.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 27 Figure 2. T ypical ST3300656FC current profiles.
28 Cheetah 15K .6 FC P roduct Man ual, Rev. A Figure 3. T ypical ST3146356FC current profiles.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 29 6. 3 Po wer diss ipatio n ST3 450856FC T ypical power dissi pation under idle condi tions in 4 Gbit opera tion is 12.27 wat ts (41.9 BT Us per hour ). T o obtain oper ating power for typical rando m read opera tions, refer to the following I/O ra te curve (see Figure 4).
30 Cheetah 15K .6 FC P roduct Man ual, Rev. A ST3 300656FC T ypical power dissi pation under idle condi tions in 4 Gbit opera tion is 10.69 wat ts (36.5 BTU s per hour ). T o obtain oper ating power for typical rando m read opera tions, refer to the following I/O ra te curve (see Figure 4).
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 31 ST3 146356FC T ypical power dissi pation under idle co nditions in 4 Gbit opera tion is 9.56 watt s (32.6 BT Us per hour ). T o obtain oper ating power for typical rando m read opera tions, refer to the following I/O ra te curve (see Figure 4).
32 Cheetah 15K .6 FC P roduct Man ual, Rev. A b. Non -operating –40° to 1 58°F (–40° to 70°C) package ambi ent with a maximum gradient of 36°F (20°C) per hour . This speci fication assumes that th e dr iv e is p ackaged in the shipping cont ain er designe d by Seagate for use w ith drive.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 33 b. Operati ng—abno rmal Equipm ent, as in stalle d for norma l operat ion, does not incur physical damage while subjected t o intermit - tent shock not exceeding 40 Gs at a maxi mum du rati on of 1 1 msec (half sinew ave).
34 Cheetah 15K .6 FC P roduct Man ual, Rev. A Figure 8. Recommended mounting Z Y X Z Y X.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 35 6.4.4.2 V ibrat ion a. Operati ng—nor mal The dr ive as inst alled for normal oper ation, shall co mply wit h the comp lete specified perf ormance while subjected t o continuous vibr ation not exce eding 10–500 Hz @ 0.
36 Cheetah 15K .6 FC P roduct Man ual, Rev. A Users shoul d use cau tion exposing an y electronic component s to uncontrolled chemical poll utant s and corro- sive chemi cals as el ectroni c dr ive com ponen t reliab i lity can be af fected by the i nst allation environmen t.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 37 6. 5 M echa nica l s peci fic ation s The follow ing nominal dimensions ar e exclusive of the decorati ve front pa nel accessory . However , dime nsions of the front panel are shown in figure below . Refer to Figure 9 for deta iled mo unting configuration dimensions.
38 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 39 7.0 Defect and error management Seag ate continues to use innovative techno logies to ma nage defect s and errors. T hese technol ogies are designed to increase da ta integr ity , perform drive se lf-m aintenance, an d validate pro per drive o peration.
40 Cheetah 15K .6 FC P roduct Man ual, Rev. A The dr ive firmwa r e error recovery algor ithms con sists o f 13 levels for rea d recoveries an d five levels for write. Each level may consist of m ultiple steps, where a step is defined as a recovery functi on involvi ng a sin gle re- read or re-write a ttempt.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 41 [1] These va lues are subje ct to change. Setting these r etry counts to a value bel ow the default setti ng could result in a n increased unrecover ed error rate w hich may excee d the value given i n this pro duct manual.
42 Cheetah 15K .6 FC P roduct Man ual, Rev. A service b y the host syste m. On r egular du ty drives, if the host system makes u se of the BMS Log Pag e, it can avoid pla cing data in suspect locations o n the medi a. Unreadable and recovered e rr o r sites will b e logged or reall ocated per ARRE/A WRE settings.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 43 7.7 Id le Re ad A fter Write Idle Read After Write (IRA W) utilizes idle tim e to verify the integrity of recently wr itte n data.
44 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 45 8.0 Inst allatio n Cheet ah 15K.6 FC disc drive inst allation is a plug- and-play pro cess. There are no jumper s, switch es, or termi- nators on th e driv e. Simply plug the dr ive i n to the host’s 40- pin Fibre Channe l backp anel connector (FC - SCA) — no cables ar e requi red.
46 Cheetah 15K .6 FC P roduct Man ual, Rev. A If forced ai r is necessary , possible air- flow patterns are shown i n Figure 10. The ai r-flow pa tterns are created by fans either forcing or draw ing air as shown in the illustrat ions.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 47 8.5 G round ing Signal ground (PCB A) and HDA groun d are connected t oget her in the drive an d cannot be sep arated by the user . The eq uipment in which the drive i s mounted is connecte d di rectly to the HDA and PCBA with no elect ri- cally isolating shock mounts .
48 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 49 9.0 Interface requ i rement s This secti on pa r tiall y describes the interface re quirement s as implemented on C h eetah 1 5K . 6 FC driv es. Addi- tion al informatio n is provided in the Fibre Ch annel Interf ace Manual ( part n umber 1002930 70).
50 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.1. 2 Fib re Cha n nel t as k mana gem ent fu nct ions T able 7 list s the F ibre Chann el SCS I Fibre Channel Prot ocol (FC SCS I FCP ) ta sk management functions sup- ported .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 51 9.1.4 Fibre Ch annel port login T able 9 identifies the required conten t of the N_Port L ogin (PLOGI) p ayload from a n initiator .
52 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.1.5 Fibr e Chann el port login accept T able 10 id entifies the N _Port Logi n access p ayload val ues. 9.1.6 Fibr e Chann el Process Lo gin T able 1 1 lists the process login payl oad dat a. XX Indicates fields that are not used.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 53 9.1.7 Fibr e Chann el Process Lo gin Accept T able 12 list s Cheet ah 15K.6 FC process log in accept p ayload dat a. 9.1.8 Fibre Ch annel fabr ic login T able 13 list s the fabric login payl oad fr om the dr i ve.
54 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.1.9 Fibr e Chann el fabric ac cept lo gin T able 14 list s the requi red conten t of the Fa bric Login Accept ( A CC) payload from the fabric.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 55 9.1.10 Fibr e Channel Ar bitrated L oop opt ions T able 15 list s the FC- AL options supported b y Cheet ah 15K .6 FC drives. 9.2 Dual port su pport Che etah 1 5K .6 FC drives have two inde pendent F C-AL po rts.
56 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9. 3 SC SI c omm and s su ppor ted T able 16 list s the SCSI co mmands sup ported by Cheet ah 15K.6 FC dr ives.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 57 Y V erify error recovery page (07h) Y Caching p arameters p age (08h) Y Control mode p age (0Ah) Y Fibre Channel Interface Control p age (19h) Y Power con.
58 Cheetah 15K .6 FC P roduct Man ual, Rev. A 32h N Searc h data low 33h N Set limits 34h N Pref etch 35h Y Synchronize cache 36h N Loc k-unlock-cache 37h Y Read defect data 39h N C ompare 3Ah N C opy.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 59 [1] Che etah 15 K.6 FC dr ives can format to 5 12, 520, 52 4 or 528 bytes per logical block. [2] Wa r n i n g . Power lo ss during fla sh programmin g can resul t in fi rmware co rruption. This usual ly makes the driv e inoperab le.
60 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.3.1 Inqu iry dat a T able 17 list s the Inq uiry command d ata that th e drive sh ould retur n to the initiator p er the forma t given in the Fibre Ch anne l Interface Manual . * C opyright year (changes with actual y ear).
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 61 On standa rd OEM drives, the saved values are taken from the default values list and store d into the saved values stor age location on the media p rior to shippi ng. 3. Current values Curren t values are volatile val ues being used by the drive to contro l i t s oper ation .
62 Cheetah 15K .6 FC P roduct Man ual, Rev. A T able 18: Mode Sense data saved, default and changeab le values for ST3450856FC drive s MODE DATA HEADER: 00 be 00 10 00 00 00 08 MODE PAGES: DEF 81 0a c.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 63 T able 19: Mode Sense data default and changeable values fo r ST3300656FC drives MODE DATA HEADER: 00 be 00 10 00 00 00 08 MODE PAGES: DEF 81 0a c0 0b ff .
64 Cheetah 15K .6 FC P roduct Man ual, Rev. A T able 20: Mode Sense data default and changeable values fo r ST3146356FC drives MODE DATA HEADER: 00 be 00 10 00 00 00 08 MODE PAGES: DEF 81 0a c0 0b ff .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 65 9. 4 M iscel la neous oper ati ng fe atur es a nd c ondit ions T able 21 list s various featur es and conditio ns. A “Y” i n the suppor t column indica tes the featu re or con dition is support ed. An “N” in th e support co l umn ind icates the feat ure or con dition is no t supported.
66 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.5 FC -AL ph ysic al inte rface Figure 1 1 shows the location of t he J1 Fibre Cha nnel single con nection attachm ent (FC-SCA ). Figur e 13 pr o- vides the d i mensi ons of th e FC-SCA connector . Det ails of the ph ysical, electrical, an d l ogical characteristi cs are provide d within this secti on.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 67 9.5.2 Conn ector req u irem ents The F C-AL SC A device conn ector is il lustrated i n Figure 13. Figu re 13 .
68 Cheetah 15K .6 FC P roduct Man ual, Rev. A T able 24: FC-SCA pin descriptions *Short p ins in mating backp anel connector . [1] This pin may be connecte d to external l ogic to d etect the presen ce of the drive. The drive conn ects this pin to the comm on ground .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 69 9.5.6 P ower Power is supplied through the F C-SCA with support for +5 volt s and +12 vo lts. All of the voltag e pins in the drive con nector are the sa me length. Four 12 volt pins provi de +12 volt power to the drive.
70 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.5.8 Active L ED Out The Ac tive LED Ou t signal is driven b y the drive as in dicated in T able 25. The Ac tive LED Out signal is design ed to pull do wn the cathode of an LED. T he anode is att ached to the proper +5 volt supply through an appr opriate current limi ting resistor .
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 71 9.5.1 1 SE L_6 thr ough S EL_0 ID l ines The S EL_6 throu gh SEL_0 ID lines de termine dr ive address, and, option ally , for an Enclosure Servic es Inter - face. W hen th e Parall el E SI line is high, the en cl osure backp ane l must pr ovide add ress info rma tion on the SEL line.
72 Cheetah 15K .6 FC P roduct Man ual, Rev. A T able 27: Arbitrated loop physical address (AL_P A) values AL_ P A (hex) SEL I D (hex) Setting (dec) AL_P A (hex) SEL I D (hex) Setting (dec) AL_P A (hex.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 73 9.5.12 Dev ice cont rol co des The dr ive input s a Device Con trol Code on the DEV _CTRL_C ODE lines at pow er up to de termine the l ink rate on the Fi bre Channe l port s. Both ports r un at the same rat e.
74 Cheetah 15K .6 FC P roduct Man ual, Rev. A 9.6.2 LED d river sign als Fault and Active LED signal s are located in the FC-SC A connector (J1) . See T able 30 for the output character - istics of the L ED drive signals. 9.6.3 FC Diffe rential ou tput The ser ial output sign al volta ge character istics are provi ded in T able 31.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 75 Figure 16 provides the da ta valid eye diagram for typical and m inimum requ irement s to recover data at the speci fied inte rface err or rate.
76 Cheetah 15K .6 FC P roduct Man ual, Rev. A.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 77 10.0 Seagate T echnology suppo r t ser vice s Inter net For info rmation regardi ng Seagate pr oducts an d services, visit www .sea gate.com . Wo rldwide support i s availa ble 24 hour s daily by email fo r your questions.
78 Cheetah 15K .6 FC P roduct Man ual, Rev. A Custo mer Se rvice Opera tion s W arranty Ser vice Seag ate of fer s worldw ide custom er supp ort for Seagate pro duct s. Seagate distri butors, OEM s and other direct customer s should cont act their Seagate Custom er Service Operation s (CSO) represent ative for wa rranty- related issu es.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 79 Index Numerics 12 volt pin s 69 3rd pa rty reserve comm and 59 5 volt pins 69 A Abor t Sequence (A BTS) 49 abort t ask set function 50 AC coup ling 68 AC .
80 Cheetah 15K .6 FC P roduct Man ual, Rev. A D DAR 42 data he ads read/wr ite 11 data ra te inte rnal 11 data tr ansfer rate 12 data valid e ye 75 Date code page command 5 6 DC power 67 requir ements.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 81 flawe d sector re allocation 8 FLOGI received on Port A 53 received on Port B 53 Force unit acce ss command 57 form f actor 8 forma t 45 Form at command e.
82 Cheetah 15K .6 FC P roduct Man ual, Rev. A Reporti ng actual r etry count 65 Segm ented caching 65 SMP = 1 in Mode S e lect command 65 Synchr onized (l ocked) spind l e oper ation 65 Zero latency r.
Cheetah 1 5K.6 FC Pro duct Manua l, Rev. A 83 Pref etch comman d 58 prefetch /multi - segme nted cache control 12 prevent i v e maintenanc e 15 priv ate loop FC-A L optio ns 55 Proc Assc 51 Process A .
84 Cheetah 15K .6 FC P roduct Man ual, Rev. A single-un it shipping pack kit 1 0 SMART 9 , 17 SMP = 1 in Mode S e lect command 65 SO 51 , 54 spindl e brake 8 Stacked connection r eq.
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Seag ate T echno logy L LC 920 D isc Drive , Scott s V alley , Califo r ni a 95066- 4544, USA Public ation N umber: 1 00465943, Rev . A, Printed in USA.
デバイスSeagate ST3146356FCの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Seagate ST3146356FCをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはSeagate ST3146356FCの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Seagate ST3146356FCの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Seagate ST3146356FCで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Seagate ST3146356FCを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はSeagate ST3146356FCの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Seagate ST3146356FCに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちSeagate ST3146356FCデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
