Instruction/ maintenance manual of the product VT-Class ATTO Technology
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Diamond Storage Array VT-Class I ns t al l at i on an d Ope r ati on M anu al © 2005 A TTO T echnology Inc. All righ ts reserved . All brand or pr oduct names ar e trademarks of their respective hol ders. No part o f this manual may be re produced in any form or by any mean s without the express wr itten permi ssion of A TTO T echnolog y Inc.
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A TTO T echnolog y Inc. Conten ts Pref ace 1.0 Diamond Storag e Array-VT Product Ov erview ........... .......... ........1 Diam ond-VT featu res Fibre C hannel m odel SCSI model 2.0 Diamond-VT Technical O verview .......... ......... .............. .
Diam ond S torage Array Insta llation and Operat ion M anual 5.0 ATTO ExpressNAV : Browser-based Interface ................. ......... ....23 Brow ser co mpatibil ity Openi ng an Exp ressNAV sessi on Navigati ng ExpressN AV 5.1 Expre ssNAV Pages .....
A TTO T echnolog y Inc. 6.4 Fibre Cha nnel Configuration Commands .............. .............35 FcConnM ode FcDataRate FcF airArb FcF rameLen gth FcFullD uple x FcHard FcHardAddre ss FcNodeName FcP or tInf o FcP or tList FcP or tName FcScsiB usyStatus FcWWNa me 6.
Diam ond S torage Array Insta llation and Operation Manu a l T emper ature VirtualDr iv eInfo ZoneInf o ZoneState 6.8 Drive Management Comma nds ......
A TTO T echnolog y Inc. 7.0 Configuring the Diamond-VT ............ .............. ........................ ........47 RAID Level 10 RAID Level 5 Virtual Ta pe Volumes Hot Spa re sleds Zones Interleav e Enhanci ng performanc e 7.1 Virtual Tape .......
Diam ond S torage Array Insta llation and Operation Manu a l Appendix A Glossa ry ............. .................. .............. ........................ ........i Fibre C hannel te chnology SAN techno logy SCSI protoco l Appendix B ATA Disk Tec hnology .
Preface This g uide will ta ke the techn ology-sav vy user through the in stallatio n and ma intenance of the Diamo nd S torage Arra y-VT . The Diamon d-VT was de signed to mee t your need for large a.
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1 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 1.0 Diamond S t orage Array-VT Product Overview The Diam ond S to rage Array-V T Class offers up to 30 V irtu al T a pe drives and up to 60 virtual ta pes in a rack mou nt or floor mod el configura tion.
2 Diamond ov erview • Aggreg ated Data Trans fer Technology (ADXT J ) for high per formance/sc alability • Ultra AT A 100 megaher tz (Mhz) • RAID Lev el 10 and R AID Level 5 con figurable • Zoning c apability com patible with t hird party servers , switche s and with delivera bles from industr y standards org anizations .
3 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 2.0 Diamond-VT T echni cal Overview The Diamond- VT uses Aggr ega ted Data T ransfer T echnology (ADXT) to achieve t he high data transf er performa nce you need.
4 T echnical overview ADXT Powers A T A to New Levels The orig inal notion of RAID was to bu ild high capacity , reliable storage subsystems using l arg e numb ers of inexp ensive di sk drives . Thus its origina l definiti on: Redunda nt Arra y of Inexpensive Drives .
5 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 3.0 Inst allation Instru ctions If you a r e familia r with the Diam ond-VT , F ibr e Chann el, SCSI and R AID configu rations, you may set up and conf igur e t he Diamond-V T using t hese instruct ions.
6 Inst allation 6 Follow the screens to fin d informati on about the array or to confi gure the array from the facto ry- default s ettings. The Di amond-VT may be set up in a RA ID Level 5 or RAID Leve l 10 configur ation with or without Hot S pare sleds and/or s et up in a zon ed configur ation.
7 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 3.1 Diamond- VT Compon ent s The Diam ond-VT ha s been design ed to be easy to use, ma intain a nd upgrade. It features a durable s teel outer case an d modula r component s in either a floor or a rack mount mode l.
8 Compone nts Rack moun t mode l The system management card is at the left fr ont of the case . At its ce nter is a DB-9 s e r ial RS-232 port wh ich allo ws a connectio n for setup, monito ring and upgrade of the unit fro m any comput er system with an RS-232 interface .
9 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 3.2 Diamond-VT Ph ysical Setup The Diam ond-VT is shi pped compl etely assem bled with two 12 0 V A C power cor ds for us e in the United S ta tes and Canad a. Immediately up on receipt, check th e shipping carton fo r damage fr om mishandl ing.
10 Physical setup Genera l Instruct ions 1 Insert th e proper conn ector into t he Host Interfac e Card in the back of the Di amond-VT. (See Connecti ng a Fibr e Channe l Array on page 11 or Connecti ng a SCSI Array on page 13 ).
11 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 3.2 .1 Connec ting a Fi bre Chann el Array The Diam ond-VT su pports up to two Fibre Channel Host I nterface Cards (HIC). Ph ysical connect ions and CLI co mmands con tribute to th e Fibr e Cha nnel topol ogy .
12 Fibre Chan nel conn ections Exhibit 3.2 .1-2 Possible 2 gig abit Fibr e Channel physical conn ections depending o n which Fib r e Channel connection mode has been selected .
13 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 3.2.2 Connecting a SCSI Array The SCSI Di amond-V T uses a VHDCI conn ector and SCSI cabl es to connect to a ho st. It automat ically detects th e type of Host In terface Car d it is usin g without any inter vention.
14 SCSI connec tions.
15 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 4.0 Ac cessing the Diamond-VT Communi cate with the Diamond- VT thr oug h the Fibre Channel link, the R S-232 por t or the Ethern et port usin g Command Line Interf ace commands or A TTO Expr es sNA V , an integrated user management console .
16 Ac cessin g the ar ray SNMP SNMP , or Si mple Netw ork Manageme nt Protocol, is an applicati on layer proto col that allo ws networ k devi ces to exchange manage ment info rmation .
17 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 4.1 I n-ban d CLI Over Fibr e Channe l In-ban d Command Line Interf ace (CLI) con figur es and man ages the Diam ond-VT usi ng SCSI-bas ed CLI comm ands over a Fibre Channel port conne ction.
18 In-band C LI to an initia tor that specifies an inc orrect Buf fer ID, Mo de, Lengt h or Bu ff e r O ffset. The Mod e is always Data ( 0x2), the Buffer ID is always 0 and the Buffer Of fs et is always 0. Exhib it 4.1- 2 The SCSI command p ro ces s: r eserve the Diamond -VT , send the command, r elease the Diamond-VT .
19 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 4.2 Serial Por t Access The Diam ond-VT provides r em ote service op erations over the RS-232 seri al port using s tandard termina l emulation s oftwar e a vailable wi th most system s.
20 Serial port access.
21 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 4.3 Ether net Access: T elnet and SNMP Protocols The optio nal 10/10 0 BaseT Ethern et port pr o vides T elnet - or SNMP-ba sed monitor ing and mana gement.
22 Ethernet pr otocols 8 Call t echnica l support (se e W arranty in the Appendix , page xv) to get the appr opriate MIB file for your Diamo nd-VT. 9 For each client, cop y the MIB fil e to the dir ector y contai ning t he SNMP ma nagem ent software. 10 Fr o m within the SNM P management softwa re, comp ile the fi le a ttodmnd-mib.
23 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 5.0 A TTO ExpressNA V : Browser-bas ed Interface The e asiest way to com munica te with the Dia mond S torag e .
24 ExpressNA V Exhib it 5.0- 3 Navigating A TTO Expr essNA V scr eens Side bar : select the item you wis h t o vie w Subm it button same as t yping all CLI commands and saveconf iguration norestar t o.
25 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 5.1 ExpressNA V Pages Each pag e in the A TTO ExpressNA V interface p r ovides in formation an d/or conf iguratio n parameters based o n specific to pics. Each page ca n be r eac hed thr o ugh the m enu on the left hand s ide of each page.
26 ExpressNA V Logical Units Displays informat ion on the logical units which h ave been configured and al lows you to ch ange t he stat us from on line or of fline or d egraded .
27 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 6.0 CLI: Interface via ASCII-ba sed Commands The comma nd line inter face (CLI) provides access to Dia mond-VT s ervices thr o ugh a set of AS CII- based co mmands.
28 Command Line Interf ace Exhibi t 6.0-3 CLI comman ds r eturns may be terse (s hort) or verbos e (with pa rameter name s and det ails of r esults). Zoni ng command r eturns fo llow th ese patt erns: Exhibi t 6.
29 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 6.1 Summary of CLI Comm ands A summa ry of the Command L ine Interfa ce commands , their def aults, an example o f how they m ight be used, a nd wher e you can find the specifics of the command.
30 CLI in dex IdeW rit e Cache en abled set idewritecac he disabled 42 Info In fo 39 InquiryDa ta InquiryDa ta 1 1456 1243 45 1.0 1 1242 14 564 2 42 IP Address 10.0.0.1 set ipad dress 19 .172.2.2 33 IPDHCP Disa bled se t ipd hcp enabl ed 33 IPG ateway 0.
31 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Syst emS N get system sn 32 T apeDriveInfo T apeDriveInfo 40 T apeV olumeBlockS i ze 1 set T apeV olumeBlockSiz.
32 Diam ond S torage Array Insta llation and Operation Manu a l 6.2 General Use Commands The follo wing command s, listed alp habetical ly , des cribe or perfo rm general fun ctions. FirmwareRestart Causes a warm restart of the Dia mond S torage Ar ray .
33 A TTO T echnolog y Inc. 6.3 Ethernet Commands Ether net configur ation comman ds configure the Ethernet an d TCP/IP par ameters for the Diamond S to rage Array with an option al Ethernet manageme nt services card. EthernetSpeed Specifies the spe ed of the Ethernet Network to which the Diamond Storage Arra y is connected.
34 Diam ond S torage Array Insta llation and Operation Manu a l SNMPT raps Enab les or disa bles S NMP traps . Default: disabled Set synt ax: set SNM PT raps [enabled|disa bl e d] Requires a SaveConfigur ation Rest art comma nd Get synt ax: get SNMP T raps SNMPUpdat es Enables or disa bles the SNMP Management Informa tion Base (MIB ) database.
35 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 6.4 Fibre Channel Configuration Commands The Fibre Channel ports are configur ed wit h default sett ings but ma y be custo mized to your specific ations u sing the CLI c ommands in this section.
36 CLI: Fibre C hannel FcP o rtLi st Lists the status o f all available Fibre Cha nnel ports. Imm ediate comm and: FcPortList FcP o rtNa me Returns the Fibre Channel po rt name stored in NVRAM for this Fibre Channel port.
37 A TTO T echnolog y Inc. 6.5 Serial Port Configuration Commands The seria l port conf iguratio n may be customi zed by using the following commands: SerialP o rtBaudRate Sets the baud r ate the Diamond Storage A rray uses for its terminal interface.
38 CLI: maintenanc e 6.6 Ma intena nce Servi ces Comma nds Mainte nance comma nds allow upda ting and ma intenance of th e Diamo nd-VT . FcScsiB usyStatus Y ou may set the Diamond to report busy or queue full when it i s unable to acce pt a command.
39 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 6.7 Diagnostic Commands Diagnos tic comman ds pr o vide inf ormation or diagn ostic tool s for Fi br e Ch annel, SCS I and Se rial port configur ations, Diamond Storage Array sett ings and the status of va rious comman ds which affect the A T A drives.
40 CLI: diagno stics P owerA udibleAlarm Silences the audible alar m for a cu rrent power supply failure. The alarm w ill be activated o n the next power failu re. Imm ediate comm and: PowerA udibleAlarm disabled RAID5C learDataStat us Displays the stat us of RAID5 Clear Da ta processing.
41 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 6.8 Drive Ma nagement Commands The Diam ond S to rage Array A T A drives ma y be monitored or configured thr ough th e CLI using th e comm ands liste d bel ow . A T ADiskStat e Sets the A T A disk to the spec if ied state.
42 CLI: configu re drives DriveW ipe Initialize s a drive: wipes it of all data. Drive must be offline Se t synta x: D rive Wip e [D estinati on S led] [De st D rive ] Requires a SaveConfigur ation Rest art comma nd Get synt ax: DriveCop yS tatus ECC Specifies or displays whether ECC is en a bled or not.
43 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual software. The remaining four char acters will be entered by the system a utomatically to ident ify the tape number . See V irtual T ape on page 49 and Optional Hot Spar e Sled on page 50 for more informa tion and examples.
44 CLI: configu re drives Reb uildPriority Sets the priority of a RAID Level 5 or 10 rebuild. If you select High priority , rebuild I/O requests are implemented before system I/O re quests. I f you select Low priority , rebuild I/O requests ex ecutes only when there are no pending I/O req uests.
45 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual ZoneCle arAll Removes all entries fr om the Planned Zone Configuration.
46 CLI: configu re drives.
47 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 7.0 Configu ring th e Diamon d-VT The Diamond -VT can be configured as RAID Level 10 or RAID Level 5 with zones and/or Hot S par e sleds. Pa rtitions ar e cr ea ted autom atically during con figuratio n of V irtual T ap e emulatio n.
48 Configu re drives Adv anced CLI co nfigura tion page of t he ExpressNA V interface. Zoning sup ports security by gran ting o r denying access b etween i nitiators and devices a s defi ned by a n admini strator . A zone is a coll ection of devic es which can access each other .
49 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 7.1 Vi r t u a l T a p e When th e Diamond-V T is conf igur e d as a V irtu al T ape, i t is divided into sev eral tape volumes ba sed on your choice an d the RAID level you cho ose.
50 Hot swap sp are sled 7.2 Optional Hot S p are Sl ed T o main tain arra y up ti me with minima l risk of dat a loss, indi vidual sleds which fail may b e r eplaced with a spar e sled.
51 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 7.3 Zo nes Zoning is a collection of r elat ed Diamond -VT capabili ties supp orting flexi ble Diamond co nfigu.
52 Zones the Acti ve configura tion will be copi ed into the Planned co nfiguratio n. T o d etermine what is in the Planne d conf igurati on, type ZoneInfo Planned . Active configuration is persiste nt and establishes the Diamo nd zoning conf iguration after power- up.
53 Diamond S torage Array Configu ring Zoni ng CAUTION CAUTION Be careful when changing Diamond- VT zoning configurations. Internal validation logic cannot detect misconfigur ations An unrestrict ed z.
54 Zones Erro rs Zone defin ition tables: The Zone commands manage entries in the Zone definit ion tables which manage th e overall zoning process. Definit ion tables are in dexed by un ique keys ( zone_na me ).
55 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 8.0 Up dating Fi rmware Engine ers, technicia ns and/or syst em admini strators/integ rators may update the fi .
56 Up date firm ware 3 Copy th e latest Diam ond-VT imag e file (“...”.ima ) onto the hos t computer and note its directo ry c:diamondflash“... ”.ima 4 Change directories to the place wher e you copied th e “...”.ima fil e cd c:diamondflash 5 Open an FT P session u sing a user- defined IP address or the defau lt (10.
57 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 9.0 Diagnostics, Upgrade and Maintenance The Diam ond-VT provides a number of visual, au dible and comp uter syst em-generated in dicators to identify th e operation al status of th e array .
58 Monitori ng, re porting temperat ure warnin g alarm w ill report OK du ring normal o perating co nditions. In an abnormal op erating conditio n, such as blowe r failure, un der high ambi ent temper.
59 Dia mond S torag e Array an error code, ple ase provide both the first and second blin k code values. Duri ng a fault condit ion, more d etailed inform ation abou t the fault may be available via the CLI or t he ExpressNA V interface over the RS- 232 inter face port or the optional E thernet port .
60 Monitori ng, re porting.
61 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 9.1 T r oublesh ooti ng The D iamond -VT p r ovides a n umbe r of indi cators to identify th e opera tional st atus of the array . System s t atus and e rro r informa tion is r eadily ava ilable.
62 T roubleshoo ting • Follow the instru ctions in the ap propriate chapt ers of this manual to r emove, repla ce and reconfi gure the dri ve such as Hot Swap Operat ing Instructions on page 69. • You may copy drive s by using Com mand Line interfac e commands.
63 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 9.2 Resetting Default s Resetting the Diamo nd-VT to de faults will not alter t he RAID con figuration, zoning configuration , IP configu ration or T elnet inform ation.
64 Reset defaul ts Exhib it 9.2- 2 Configura tions which will be changed d uring a Re storeCon figuration command Comma nd Default Reset if def ault chosen Rese t during factoryd efault Audib leAlarm D isabled ▼▼ AutoRebui ld Disabled ▼ DiamondNam e “ .
65 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 9.3 Rebuilding RAID Level 5 and 10 Configurations If a sled mus t be r emov ed and a new sled inserte d into th.
66 rebuil ding RAID To synchronize mirrored drives manually The most ef ficient method to sy nchronize V irtual T ape confi gurations is to ena ble Hot Spares or the auto re build feature. 1 Connect to Diamond Storage Array services via the RS-232 port or the optional Ethernet management services card (see Acces sing th e Diamond-VT on page 15).
67 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 10.0 Hardwa re Maintenance The disk drive sleds, bl ower assembl ies, power sup plies, host interface cards, and system m anagemen t car d ma y be r eplaced wi th identica l or upgraded parts .
68 Hardware mai ntenance E xhibit 10-2: Above, dis k driv e sl ed part ially pul led out of the D iam ond Storage Array . Bottom le ft, t op of disk drive sle d.
69 A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual 10.1 Hot Swap Operating Instructions T o ma intain array up t ime, indi vidual dis k drive sl ed assem blies, power supplies and blow er assemb lies can be r eplaced with the unit fu lly operat ional.
70 Hot swap hardw are P ower Supplies CAUTION CAUTION Do not lea ve em pty op enings on the f ront or rear of th e Diamond- VT under any cir cumstances. Empty openings affect air flow an d may caus e the un it to over heat an d shut do wn. WARNING Hazard ous vol t age an d store d energy hazard when r emoving po wer supp lie s.
A-i A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Appe ndix A Glos sary The follow ing terms a r e only a few ex ample s of the langu age used for F ibr e Channe l, SCSI and sto rage syste ms.
A-ii Appendix F_port A port in t he FC fabric whe re a N_po rt may att ach FC-AL Fibre Channe l Arbitrated Loop: an FC netw ork in whi ch up to 126 syst ems and devi ces are connec ted in a loop to po.
A-iii A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Appe ndix B A T A Disk T echnolo gy A T A is the d ominant d isk drive t ech nology today and w ill be for the for esee able futur e.
A-iv Appe ndix C In formation C ommand Re turns Drivei nfo Sled Capacity Errors TYPE ... VDID Capacity Errors TYPE VDID === ====== .. ===== ===== == === ====== ==== = ===== .
A-v A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Read 0000 0000 0000000 0 W ri te 0000000 0 0000000 0 Error s 00000000 LunInf o for a JBOD setup LUN TYPE St ate Ca pacity Errors SerialNum ber === ==== ===== ======= ==== =========== = 0 Processor ONLINE 0MB .
A-vi W ri te 0000000 0 0000000 0 Error s 00000000 LunInfo for a RAID5 1 confi guration LUN TYPE St ate Capacity Errors Seri alNumber === ==== ===== ====== ==== ========= === 0 Pro cesso r ONLINE 0MB 0.
A-vii A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual V olume Partit ion T otal % Ca pacity W rite ID LU N VDID ID Ca pa city Used Protection ============ ============ ================= ====== 059 - 59 0 3439315MB 0% disabled Ready .
A-viii.
A-ix A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Appendix D Sample Zo ning Comma nd Sequen ces First time config uration ( af ter download) QuickRA ID under Z oning “fir st time” c onfiguratio n, an all/all/all confi guration in the selected QuickRAID confi gurati on.
A-x Appendix Asym metric Model 3 hosts, 1 metadata con troller (also a host) , RAID 5 with 3 LUN s. All z one command s except ZoneCommi t affect onl y the planned configuratio n. ZoneCommi t sets the Planned Configuration into the Active Configura tion.
A-xi A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Comb ined Symmetr ic/Asymmetric M odel Many ho sts . All zon e comman ds exce pt ZoneCommi t affect onl y the planned configuratio n. ZoneCommi t sets the Planned Configuration into the Active Configura tion.
A-xii Appendix Appe ndix E S pecifi cations En vironme nt al and ph ysical • Humidity : 10-85% non -condensing • Normal operating te mperature at s ea level: 5- 40 o C • Storag e temperature: - 25-60 o C • AC input voltage 1 00-240V rated • 50/ 60 Hz Rac k Mount Dimensions • Height: 1 31mm (5.
A-xiii A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Appendix F Product Safety Safe h andling of the D iamond-V T will help pr otect its compo nents as well a s the people w orking with t hem . • The Di amond-VT is hea vy (92 pou nds for the floor mo del, 86 pounds for the rack mount system ).
A-xiv Appe ndix G Part number s Each D iamon d-VT has a ma ster part num ber to identify it. Th e floor mo del base n umber is on the side of the u nit.
A-xv A TTO T ec hnology Inc. Di amond S tor age Array Instal lation and Oper ation Man ual Appendix H Wa r r a n t y Manufa cturer limited warra nty Manufac t ure r warrants t o th e origina l purchaser of this product that it will be free from defects in material and workm anship as des cribed in th e A TTO T echnol ogy website, www .
An important point after buying a device ATTO Technology VT-Class (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought ATTO Technology VT-Class 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 ATTO Technology VT-Class - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ATTO Technology VT-Class you will learn all the available features of the product, as well as information on its operation. The information that you get ATTO Technology VT-Class will certainly help you make a decision on the purchase.
If you already are a holder of ATTO Technology VT-Class, 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 ATTO Technology VT-Class.
However, one of the most important roles played by the user manual is to help in solving problems with ATTO Technology VT-Class. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ATTO Technology VT-Class 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
