Instruction/ maintenance manual of the product ST3400755FC Seagate
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Prod uct Ma nu al Chee t ah NS FC 10045 7516 Rev . B Aug ust 2007 ST34 00755F C ST33 00955F C.
Copyri ght © 200 7 Seagate T echnology LL C. All right s reserved . Printed in U.S .A. Pub lication nu mber: 10045751 6, Rev . B, August 2007 Sea gate, Sea gate T echnolog y and the W ave logo are registe r ed t r ade marks of S eagate T echno logy LLC in the Uni ted S tates and /or other coun tries.
Cheetah N S FC Pr oduct Manu al, Rev. B i.
ii Cheetah N S FC Produ ct Manual, R ev. B.
Cheetah N S FC Pr oduct Manu al, Rev. B i Cont ent s 1.0 S cope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 S tandards, co m plian ce and ref erence docum ents .
ii Cheetah N S FC Produ ct Manual, R ev. B 6.4.2 Relat ive humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 6.4.3 E ffective altitude (sea level) . . . . . . . . . . . . . . . . . . . . . . . .
Cheetah N S FC Pr oduct Manu al, Rev. B iii 9.6 S ignal ch aracteristic s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 9.6.1 T TL input cha racteristics . . . . . . . . . . . . . . . . . .
iv Cheetah N S FC Produ ct Manual, R ev. B.
Cheetah N S FC Pr oduct Manu al, Rev. B v List o f Figures Figure 1. Typical ST330095 5FC dri ve, 4 Gbit, + 5V and +12V curr ent profiles . . . . . . . . . . . . . . . . . . . . . 27 Figure 2. ST340075 5FC DC curren t and pow er vs. input /output operation s per second at 4 Gb it .
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Cheetah N S FC Pr oduct Manu al, Rev. B 1 1.0 S cope This ma nual describes Sea gate T e chnology ® LLC, C heetah NS FC (Fibre Channe l) disc driv es. Cheet ah NS FC drives support the Fi bre Channe l Arb itrated Loop and SCSI Fibre Channel Protocol spe cifica- tions to th e extent described i n this man ual.
2 Cheetah N S FC Produ ct Manual, R ev. B.
Cheetah N S FC Pr oduct Manu al, Rev. B 3 2.0 S t andards, compliance and reference docu m ent s 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 N S FC Produ ct Manual, R ev. B 2.2 C omp liance 2.2.1 Elect roma gn etic com plia nce Seag ate uses an i ndepend ent lab oratory to confirm comp li a nce 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 N S FC Pr oduct Manu al, Rev. B 5 2.3 Ref erence doc ument s Che etah NS FC Insta llation Guide Seag ate par t number: 100457517 SCSI Commands R eferen ce Manual Seag ate par t number: 1002 93068 Fibre C hanne l Inter face Manual Seag ate par t number: 100293070 ANSI Fibre C hannel D ocument s X3.
6 Cheetah N S FC Produ ct Manual, R ev. B.
Cheetah N S FC Pr oduct Manu al, Rev. B 7 3.0 General d escri p tion Cheet ah NS FC drives provide high p er formance, high cap acity data storage for a variety o f systems including engineer ing workstat ions, network servers, mainfr ames , and supe rcomputers.
8 Cheetah N S FC Produ ct Manual, R ev. B 3. 1 St a nd ar d fea tu re s Cheet ah NS FC dri ves have the following stan dard features: • Perp endicula r recordi ng techn ology • 4-Gbi t Fibre Chann.
Cheetah N S FC Pr oduct Manu al, Rev. B 9 3.3 P erform ance • Prog rammable multi-segme ntabl e cache buf fer • 800 Mb ytes/sec maximum instantan eous data tra nsfers per port • 10k RPM spindle .
10 Cheetah N S FC Produ ct Manual, R ev. B 3.7 Fa ctor y-ins talled opti ons Y ou may order the follo wing items which are incor porated at the manufacturing facility durin g production or packa ged before shipping .
Cheetah N S FC Pr oduct Manu al, Rev. B 11 4.0 Performance cha r acteristics This secti on pr ovides det ailed informa tion concerning perfor mance-re l ated ch aracteristics a nd feature s of Cheetah NS FC drives. 4.1 Int e rnal dr iv e charac ter is tics ST3400755FC ST3300955FC Drive capacity* 400.
12 Cheetah N S FC Produ ct Manual, R ev. B 4.2.2 For mat co mmand execut ion tim e (m inut es) Executio n time measured from receipt of t he last byte of the C omman d Descrip tor Block ( CDB) to th e request for a S tatus B yte T ransfer to th e Initiat or (excluding connect/disconne ct).
Cheetah N S FC Pr oduct Manu al, Rev. B 13 4.4 Pr ef etch /mult i-s eg men te d cach e cont ro l The d rive provides a pref etch (rea d look-ahead) and mult i- segmented cache contr ol algorithm s that i n many cases ca n enhance syst em per formance.
14 Cheetah N S FC Produ ct Manual, R ev. B If rea d caching is en abled (RCD=0), then dat a written to th e medium is retained in the cach e to be m ade avail- able for future read cach e hit s. The sam e buffe r space and se gmentation i s used as set up for read fun ctions.
Cheetah N S FC Pr oduct Manu al, Rev. B 15 5.0 Reliabi lity specifi cations The follow ing reliab ility specificat ions assume correct hos t and driv e ope ration al int erface, inclu ding all inter - face timi ngs, power supply volt ages, environ m ental requir ements and d r ive m ounting constr aints.
16 Cheetah N S FC Produ ct Manual, R ev. B 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. Af ter dete cting an initia l seek error , the drive autom aticall y perf orms an error recovery process.
Cheetah N S FC Pr oduct Manu al, Rev. B 17 The Pass-thro ugh st ate is disabled while the drive perfo rms se lf t est of the FC interfa ce. The contr ol line for an externa l por t byp ass circuit remains in the Enable Byp ass sta te wh ile self test is r unning.
18 Cheetah N S FC Produ ct Manual, R ev. B Re po rt ing co nt rol Reporti ng is controlled by the MRI E bits in the Info rmational Excep tions Control mode page (1Ch). Subject to the repo rting method, the f irmware w ill issue to the ho st an 01- 5Dxx sense code .
Cheetah N S FC Pr oduct Manu al, Rev. B 19 be use d to set this trip point. The d efault val ue for this dri ve is 68°C, however , you can set it to any value in the range of 0 to 68°C. If you speci fy a tem perature greater than 6 8°C in this fiel d, the temperature is rounded down to 68 °C.
20 Cheetah N S FC Produ ct Manual, R ev. B A Drive N ot R eady condition is reported by the drive under the fol lowing con ditions: • Motor will not spin • Motor will not lock to speed • Servo w.
Cheetah N S FC Pr oduct Manu al, Rev. B 21 The dr ive will report the failur e condition an d LBA (if ap plicable) in the S elf-test Re sults Log p a r ameter . The Sense key , ASC, ASCQ, and FRU are used to repor t the failure co ndition. 5.2.6.2. 5 Abort There are severa l w ays to ab ort a diagnost ic.
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Cheetah N S FC Pr oduct Manu al, Rev. B 23 6.0 Physi cal/electrical spe ci fications 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 rem ent s None. 6.2 DC po wer requ i rem ent s The volta ge and current requir ements for a sin gle drive a re shown below .
24 Cheetah N S FC Produ ct Manual, R ev. B [1] Measured with average readin g DC ammeter . Instan taneou s +12V cur rent peaks wi ll exceed these val - ues. P ower suppl y at nomina l voltage. N ( number of drive s tested) = 6, 3 5 Degrees C a mbient.
Cheetah N S FC Pr oduct Manu al, Rev. B 25 6.2.1 Cond ucted nois e immunity Noise is specifi ed as a per iodic and random distr ibution of fre quencies cover i ng a ba nd from DC to 1 0 MHz. Maximum allowed noise valu es given below ar e peak-to- peak measurem ents and apply at the driv e power connector .
26 Cheetah N S FC Produ ct Manual, R ev. B 6. 2.3 Current profil es The +12V and + 5V current p rofiles for th e ST340 0755FC and ST 3300955F C model s are shown below . Not e: All times and currents are typical. See T ables 2 and 3 for maximum c urrent requirements.
Cheetah N S FC Pr oduct Manu al, Rev. B 27 Figure 2. T yp ical ST3300955FC drive, 4 Gbit, +5V and +12V cu rrent profiles.
28 Cheetah N S FC Produ ct Manual, R ev. B 6. 3 Po wer di ssipat ion ST3 400755FC T ypical power dissi pation under idle condi tions in 4 Gbi t opera tion is 8.1 watt s (27.64 BTU s per hour ). T o obta in operating powe r for typical rando m read opera tions, refer to the following I/O ra te curve (see Figure 3).
Cheetah N S FC Pr oduct Manu al, Rev. B 29 ST3 300955FC T ypical power dissi pation under idle condi tions in 4 Gbi t opera tion is 7.62 watt s (26.0 BTU s per hour ). T o obta in operating powe r for typical rando m read opera tions, refer to the following I/O ra te curve (see Figure 3).
30 Cheetah N S FC Produ ct Manual, R ev. B 6.4 Enviro nmental li mit s T emperatur e and humidity values exp erienced by the dr iv e must be such t hat condensation does not occur on any dr i ve p art. Altitude a nd atmospheri c pressu re speci fications are refe renced to a st andard day a t 58.
Cheetah N S FC Pr oduct Manu al, Rev. B 31 6.4.3 Eff ective alt itude (sea level) a. Operati ng –200 to +1 0,000 feet ( –61 to +3,04 8 meters) b. Non -operating –200 to +4 0,000 feet ( –61 to +12,2 10 meters) 6.4.4 Sho ck and vibrat ion Shock and vibrati on limit s specified in this document ar e measured d irectly on the dr ive chassis.
32 Cheetah N S FC Produ ct Manual, R ev. B Drives packa ged in single or multip acks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for genera l freight shipment sha ll withstand a drop test fr om 48 inch es (1,070 mm ) agai nst a concrete flo or or equival ent.
Cheetah N S FC Pr oduct Manu al, Rev. B 33 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 specifie d performance w hile subjected t o continuous vibr ation not exce eding 5 - 500 Hz 0.
34 Cheetah N S FC Produ ct Manual, R ev. B exposed to a n am bient relative hum idity gr eate r th an 9 5%. Mat erials used in cabin et fa bricati on , such as v ulca- nized rubb er , that can outgas corrosive comp ounds should be minim i ze d or elimina ted.
Cheetah N S FC Pr oduct Manu al, Rev. B 35 6. 5 M echa ni cal s pe cifi cat ion s Refer to Figure 7 f or deta iled physica l dimen si o ns. See Section 8.4, “Drive mount i n g.” Fig ure 7. M ounti ng c onfi gura tio n di mensi ons Heigh t (max): 1.
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Cheetah N S FC Pr oduct Manu al, Rev. B 37 7.0 Defect and error management Seag ate continues to use innovative techno logies to ma nage defect s and errors. T hese technologi es are designed to increase da ta integr ity , perform drive se lf-maintena nce, and validat e proper driv e opera tion.
38 Cheetah N S FC Produ ct Manual, R ev. B The drive firmware error recove ry algori thms consist s of 1 1 levels for re ad recoveries and five levels for wri te. 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 N S FC Pr oduct Manu al, Rev. B 39 7. 3 FC -A L sy stem err or s Inform ation on the rep orting of operat i onal error s or faul ts acr oss the interface i s given i n the Fib re Channel Interfa ce Manual . Th e FCP Response returns infor mation to the h ost about numerou s kinds of errors o r faults.
40 Cheetah N S FC Produ ct Manual, R ev. B 7.6 De ferr ed A uto-R eall ocat ion Deferred Aut o-Realloc ation (DAR) simplifies reallocation al g orithms at the system leve l by allowing the drive to reall ocate un readabl e location s on a subse quent write comman d.
Cheetah N S FC Pr oduct Manu al, Rev. B 41 8.0 Inst al lat ion Cheet ah NS FC di sc drive i nstal lation is a plu g-and-pla y process. Ther e are no jump ers, swit ches, or t ermina- tors o n the drive. S imp ly plug the drive into the host’s 40-pin Fi bre Chann el backpanel connecto r (FC- SCA) — no cables a re required.
42 Cheetah N S FC Produ ct Manual, R ev. B If forced air is necessary , possib le air- flow p atterns are shown in Fi gure 8. Th e air-fl ow patter ns are created by fans eithe r forcing or drawing air a s shown in the illu str ations.
Cheetah N S FC Pr oduct Manu al, Rev. B 43 8.5 G roundi ng Signal ground (PCB A) and HDA groun d are conn ected toget her i n the dr ive an d cannot be separated b y the user . The equipme nt in which the drive i s mounted is connecte d directl y to the HDA and PCBA with no electri- cally isolating shock mounts .
44 Cheetah N S FC Produ ct Manual, R ev. B.
Cheetah N S FC Pr oduct Manu al, Rev. B 45 9.0 Interface requ i rement s This secti on partiall y describes the inter face requirement s as implemen ted on Cheetah NS FC driv es. Addi- tion al informatio n is provided in the Fibre Ch annel Interf ace Manual (p art number 10 0293070).
46 Cheetah N S FC Produ ct Manual, R ev. B 9.1. 2 Fib re Cha nne l task m anage men t fu nct ion s T able 6 list s the Fibre Channel SC SI Fi bre Chann el Protocol ( F C SCSI FCP ) ta sk managem ent functions su p- ported .
Cheetah N S FC Pr oduct Manu al, Rev. B 47 9.1.4 Fibre Ch annel port login T able 8 ide ntifies the req uired conten t of the N_Port L ogin (PLOGI) p ayload from a n initiator .
48 Cheetah N S FC Produ ct Manual, R ev. B 9.1.5 Fibr e Chann el por t login acce pt T able 9 ide ntifies the N_Port L ogin access p a yload values. 9.1.6 Fibr e Chann el Process Lo gin T able 10 lis ts th e process login payload d ata. XX Indicates fields that are not used.
Cheetah N S FC Pr oduct Manu al, Rev. B 49 9.1.7 Fibr e Chann el Process Lo gin Accep t T able 1 1 list s Cheetah NS FC pr ocess login accept p ayload dat a. 9.1.8 Fibre Ch annel fabr ic login T able 12 lis ts th e fabric login p ayload fr om the drive.
50 Cheetah N S FC Produ ct Manual, R ev. B 9.1.9 Fibr e Chann el fabric ac cept lo gin T able 13 li sts th e required conten t of the Fabric Login A ccept (ACC) payload from the fabric .
Cheetah N S FC Pr oduct Manu al, Rev. B 51 9.1.10 Fibr e Channel Ar bitrated Loo p opt ions T able 14 lis ts th e FC-AL options supported by Cheet ah NS FC drive s. 9.2 Dual port su ppor t Che etah NS FC drives h ave two i ndependen t FC-AL port s. These por ts may b e connected on i ndepend ent loops or on the same l oop.
52 Cheetah N S FC Produ ct Manual, R ev. B 9. 3 SC SI com mand s supp ort ed T able 15 lis ts th e SC SI comma nds supporte d by Cheet ah NS FC dri ves.
Cheetah N S FC Pr oduct Manu al, Rev. B 53 Y V erify error recovery page (07h) Y Caching parameters page (08h) Y Control mode p age (0Ah) Y Fibre Channel Interface C ontrol p age (19h) Y Power control.
54 Cheetah N S FC Produ ct Manual, R ev. B 32h N Search data low 33h N Set limits 34h N Prefetch 35h Y Synchronize cache 36h N Lock-unlock-cache 37h Y Read defect data 39h N Compare 3Ah N Copy and v e.
Cheetah N S FC Pr oduct Manu al, Rev. B 55 [1] Che etah NS FC driv es can form at to 512, 520, 5 24 or 528 bytes per logi cal bl ock. [2] Wa r n i n g . Power lo ss during fla sh programmi ng can result in fi rmware co rrupti on. This usually makes the driv e inoperab le.
56 Cheetah N S FC Produ ct Manual, R ev. B 9.3.1 Inqu iry dat a T able 16 list s the Inquiry co mmand dat a that the dr ive sh ould retur n to the initiator p er the forma t give n in the Fibre Ch anne l Interface Manual . * Copyright year (c hanges with actual year).
Cheetah N S FC Pr oduct Manu al, Rev. B 57 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 r ior to shippi ng. 3. Curren t values Curren t values are volatile val ues being used by the dri ve to contro l i t s oper ation .
58 Cheetah N S FC Produ ct Manual, R ev. B T able 17: Mode Sense data saved, default and changeab le values for ST3400755FC drive s MODE SENSE (10 BYTE) HEADER DATA 00 ae 00 10 00 00 00 08 2e 90 ed d .
Cheetah N S FC Pr oduct Manu al, Rev. B 59 T able 18: Mode Sense data default and changeable values fo r ST3300955FC drives MODE DATA HEADER: 03 8a 00 10 00 00 00 08 MODE PAGES: DEF 80 06 00 80 0f 00 .
60 Cheetah N S FC Produ ct Manual, R ev. B 9. 4 M iscel la neou s op er ating feat ur es a nd c ondit io ns T able 19 lists va rious f eatures an d conditio ns. A “Y” in the support colum n indica tes the featu re or con dition is support ed. An “N” in th e support co lumn ind icates the feat ure or condition i s not supp orted.
Cheetah N S FC Pr oduct Manu al, Rev. B 61 9.5 FC -AL phys ical inte rface Figure 9 shows the location of the J1 Fibre C hannel sing l e con nection att achment (FC-S CA). Fi gure 1 1 pr o- vides the d i mension s of the FC-SCA connector . Det ails of the ph ysical, electrical, an d l ogical characteristi cs are provide d within this secti on.
62 Cheetah N S FC Produ ct Manual, R ev. B 9.5.2 Conn ector req uirement s The F C-AL SC A device conn ector is il lustrated i n Figure 1 1. Figu re 1 1 .
Cheetah N S FC Pr oduct Manu al, Rev. B 63 T able 21: 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 p resence of the drive. The dr i v e conn ects thi s pin to the comm on ground .
64 Cheetah N S FC Produ ct Manual, R ev. B 9.5.6 P ower Power is supplied through the FC-SCA with support for +5 volt s and + 12 volts. A ll of the voltag e pins in the drive con nector are the sa me length. Four 12 volt pins provide +12 vol t power to the driv e.
Cheetah N S FC Pr oduct Manu al, Rev. B 65 9.5.8 Active L ED Out The Ac tive LED Ou t signal is d r iven by the d rive as indi cated in T able 22. The Ac tive LED Out signal is design ed to pull do wn the cathode of an LED. The ano de is attached to the proper +5 volt supply through an appr opriate curre nt lim iting resistor .
66 Cheetah N S FC Produ ct Manual, R ev. B 9.5.1 1 SEL_6 through SEL _0 ID l ines The S EL_6 throu gh SEL_0 ID lines de termine dr ive ad dress, and, optionally , for an Enclosur e Service s 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.
Cheetah N S FC Pr oduct Manu al, Rev. B 67 T able 24: Arbitrated loop physical address (A L_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) .
68 Cheetah N S FC Produ ct Manual, R ev. B 9.5.12 Dev ice cont rol co des The dr ive input s a Device Con trol Cod e on the DEV _CTRL_COD E lines at power up to determine the li nk rate on the Fi bre Channe l port s.
Cheetah N S FC Pr oduct Manu al, Rev. B 69 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 27 for the output character - istics of the L ED drive signals. 9.6. 3 FC Di ff ere nt ial out put The ser ial output si gnal vol tage char acteristi cs are provided in T able 28.
70 Cheetah N S FC Produ ct Manual, R ev. B Figure 14 provides the da ta valid eye diagram for typical and min imum requ irements to r ecover data at the speci fied inte rface err or rate.
Cheetah N S FC Pr oduct Manu al, Rev. B 71 10.0 Seagate T echnology suppo r t service s Inter net For info rmation regardi ng Seagate pr oducts and servi ces, visit www .se a gate.com . W orldw ide support i s availa ble 24 hour s daily by email fo r your questions.
72 Cheetah N S FC Produ ct Manual, R ev. B Custo mer S ervice Op eratio ns W arranty Ser vice Seag ate of fer s worldw ide custom er supp ort for Seagate pro duct s. Seagate distributor s, OEM s and other direct customer s should cont act their Seagate Custom er Service Ope rations ( CSO) represent ative for warra nty- related issu es.
Cheetah N S FC Pr oduct Manu al, Rev. B 73 Index Numerics 12 volt pin s 64 3rd pa rty reserve comm and 55 5 volt pins 64 A Abor t Sequence (A BTS) 4 5 abort t ask set function 46 AC coup ling 63 AC po.
74 Cheetah N S FC Produ ct Manual, R ev. B D DAR 40 data block si ze modifi ng the 9 data he ads read/wr ite 11 data ra te inte rnal 11 data tr ansfer rate 12 data valid e ye 70 Date code page command.
Cheetah N S FC Pr oduct Manu al, Rev. B 75 Firmw are do wnload o ption co mmand 54 Firmw are nu mbers pag e command 52 flawe d sector re allocation 8 FLOGI received on Port A 49 received on Port B 49 .
76 Cheetah N S FC Produ ct Manual, R ev. B Queue ta gging 60 Reporti ng actual r etry count 60 Segm ented caching 60 SMP = 1 in Mode S ele ct command 60 Synchr onized (l ocked) spind le operati on 60 .
Cheetah N S FC Pr oduct Manu al, Rev. B 77 prefetch /multi - segme nted cache control 13 prevent i ve mai ntenanc e 15 priv ate loop FC-A L optio ns 51 Proc Assc 47 Process A ccept (ACC) 49 Process Lo.
78 Cheetah N S FC Produ ct Manual, R ev. B SMP = 1 in Mode S ele ct command 60 SO 47 , 50 spindl e brake 8 Stacked connection r eq. 47 , 50 standar ds 3 Star t unit/stop uni t comm and 53 start/stop t.
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Seag ate T echnolog y LLC 920 D isc Drive , Scott s V alley , Califo rnia 95 066-4544 , USA Public ation N umber: 1 00457516, Rev . B, Pr inted in USA.
An important point after buying a device Seagate ST3400755FC (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Seagate ST3400755FC yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Seagate ST3400755FC - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Seagate ST3400755FC you will learn all the available features of the product, as well as information on its operation. The information that you get Seagate ST3400755FC will certainly help you make a decision on the purchase.
If you already are a holder of Seagate ST3400755FC, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Seagate ST3400755FC.
However, one of the most important roles played by the user manual is to help in solving problems with Seagate ST3400755FC. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Seagate ST3400755FC along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
