Manuel d'utilisation / d'entretien du produit A12U/A08U-G2421 du fabricant Infortrend
Aller à la page of 91
EonStor A08U/A12U-G1410 i EonStor ® A12U/A08U-G2421 SCSI-to-SATA RAID Subsystem Installation and Hardware Reference Manual Version 1.1 (12, 2005).
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Contact Information Asia Pacific (International Headquarters) Infortrend Technology, Inc. 8F, No. 102 Chung-Shan Rd., Sec. 3 Chung-Ho City, Taipei Hsien, Taiwan Tel: +886-2-2226-0126 Fax: +886-2-2226-0020 sales@infortrend.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Copyright 2005 This Edition First Published 2005 All rights reserved. This publication may not be rep roduced, transmitted, t ranscr.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Warnings and Certifications FCC (applies in the U.S. and Canada) FCC Class B Radio Frequency Interference Statement This equipment h.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Table of Contents C ONTACT I NFORMATION ..................................................................................................................... II W ARNINGS AND C ERTIFICATIONS .
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual 2.6.2 Uninstalled Com ponents...................................................................................................... 2-7 2.7 R ACKMOUNTING .............................
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual 5.4 R EPLACING A F AULTY BBU ................................................................................................. 5-8 5.5 R EPLACING A F AILED PSU M ODULE ...............
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Safety Precautions Precautions and Instructions • Prior to powe ring on the s ubsystem , ensure that the co rrect power ra nge is being used. • The EonStor A12U and A 08U subsy stems com e with ei ght (8) or twelve (1 2) drive bays.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual About This Manual This manual: • Introduces the EonStor A12U/A08U-G2421 RAID Subsys tems. • Describes all the active com ponents in the subsystem . • Provides recomm endations and detai ls about the hardware instal lation process.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Important Messages Important m essages appear where mi shandling of c omponent s is possibl e or when work orders c an be m isunderstood . These messages al so provide vi tal inform ation associated with other aspects of system operation.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Software and Firmware Updates Please contact your system vendor or visit In fortrend’s FTP site ( ftp.
Chapter 1 Introduction 1.1 Product Overview 1.1.1 Introduction This hardware manual briefly introduces the EonStor A12U and A08U serial ATA (SATA) RAID subsystem series.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual 1.1.2 Model Variations There are two available models in the 2U version of the EonSt or SATA- II RAID subsystem series. Below is a compari son chart list ing major c omponent s of the tw o models.
Chapter 1: Introduction Figure 1-3: Locations of Key Components in a 12-bay Mode l Figure 1-4: Locations of Key Components in an 8 -bay Model CAUTION! When working with the subsystem, it is importan t to use tools with extreme care. Do not place t ools or other i tems on top of the enclosure to help avoid damaging the outward appearance of chassis.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual 1.1.3.2 Physical Dimensions The subsystems come in a standard 2U, 19” chassis wi th the following dim ensions: • Measured wit h .
Chapter 1: Introduction • Drive bays with drive tray canisters: The dr ive ba ys are us ed to house the subsystem har d drives. The A12U contain s 12 dr ive ba ys while the A08U co ntains 8 drive bays with a blank plat e covering the lower part of the front panel.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Figure 1-9: Rear View – A12U-G2421 Subsystem Figure 1-10: Rear View – A08U-G2421 Subsystem The rear panels sho wn above are de s.
Chapter 1: Introduction 1.1.3.6 Backplane Board An integrated backplane board separate s the front and rear sections of the subsystem s. The PCB board pr ovides traces fo r logic level signal traces and l ow voltage power paths. It contains no user-serviceable components.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Figure 1-13: Closing the Front Ha ndles 1.2.2 Drive Trays The subsystems co me with 12 or 8 drive trays (see Figure 1- 14 ) designed to accommodate separately purchased standard 1- inch pitch, 3.
Chapter 1: Introduction The controll er module co ntains no use r-serviceable co mponents. Except when replacing a faulty unit or i nstalling/upgrading the cache m emory inside, the controller module should never be rem oved or opened.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual • COM Port All controlle r modul es come with one RS-232C (audio jack) serial p ort. The serial port is used for local access to the syst em -embedded configuration utility over th e included serial port cable.
Chapter 1: Introduction 1.2.5 Power Supply Units PN: IFT-9272CPSU-0011 The SATA-based EonS tor subsystems are equipp ed with two (2) redund ant, hot- swappable, 2U, 350W power supply unit (P SUs) modules.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual 1.2.6 Cooling Fan Modules PN: 9272CfanModE-0010 The SATA-ba sed EonStor s ubsystem s are equippe d with two (f or A08U, t he 8-bay model) or t hree (for A12U, the 12-bay model), 1U single -fan, red undant, hot- swappable c ooling m odules show n in Figure 1-18 .
Chapter 1: Introduction NOTE: There are two values set fo r the upper tempera ture thresho lds. One is set for event notification and the other triggering high er fan rotation sp eed. The preset value for event notificatio n can be changed using the firmware-embedd ed configuration utility, while the fan sp eed trigger is not a user’s option.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual terminal em ulation pr ogram runni ng on a m anagement com puter that i s connected to the subsystem’s seri al port.
Chapter 1: Introduction 1.4.3 Normalized Airflow Proper su bsystem cooli ng is refer red to as “norm alized” airflow. Normalized airfl ow ensures the su fficient cooling of th e su bsystem and is only attained when all components a re prope rly install ed.
Chapter 2 Hardware Installation 2.1 Introduction This chapter gives detailed instru ctions on how to install the subsystem. When installing the subsystem, it is necessary t o mount the chassis into a rack or cabinet and to install hard drives an d drive trays.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual (2). One (1) audio-jack-to-DB9 cable is provided to facilitate the connection of the COM1 port for local terminal em ulation access to the array. (3). Two (2) power cord s are provid ed for the pow er conne ctions to the pow er sources.
Chapter 2: Installati on 6. None of the covers or replaceable modules shoul d be rem oved in order to maintain compliance with safety, emission, or thermal requirements. 7. Always secure every enclosu re module by its retainin g screws or m ake sure it i s held in place by its latches.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual • Install or repla ce the BBU m odule only with a BB U module sup plied by your subsystem vendor. Use of battery cells provided by another source will void our warranty. • Always dispo se of dischar ged or used bat teries in an ec ologicall y responsible manne r.
Chapter 2: Installati on Step 2. Install an optional BBU: a battery backup unit is highly recommended for its pr otection to dat a integri ty. It should be installed prior to o perating the subs ystem.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Figure 2-1: Installation Proced ure Flow chart 2.5 Unpacking the Subsystem Use the unpacking ch ecklist in your pack age to check packing contents. Carefully check the items contained in each box befo re proceeding with installation.
Chapter 2: Installati on 2.6 Installation Overview 2.6.1 Pre-installed Components The following components have been pre- installed in the EonStor subsystems and therefore do not need to be installed.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Wrenches may be necessary, depending on the rack ty pe • Use the included M5 or M6 screws for securing the ch assis through its front mounting ears.
Chapter 2: Installati on 2.8 BBU Installation 2.8.1 BBU Module Installation Overview The BBU module i s an optional it em that can sustain cac hed data in the eve nt of a power outage or in t he unlikel y event that bot h PSUs ha ve failed. P urchasing a nd installing a BB U is hig hly recomm ended.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Step 3. Install the BBU module. Align the BBU module wi th the BB U module slot and gently insert the BBU module until the back of t he BBU module reaches the end of the slot. Step 4.
Chapter 2: Installati on 2.9 Hard Drive Installation WARNING! 1. Handle hard drives with extreme care. Hard drives are very delicate. Dropping a drive onto a har d surface (even from a short distance) and hitting or touchin g the circuits o n the drives wi th your tools may all cause damage to drives.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Figure 2-4: Installing a SATA Hard Drive Step 2. Adjust the drive’s location un til the mounting holes in the drive canister are aligned with those on the hard drive. Secure the drive with four supplied 6/32 flat head screws.
Chapter 2: Installati on Figure 2-5: Front View of an Ind i vidual Drive Tray Step 2. Open the front flap on the drive tray. (See Figure 2-6 ). To open the flap, push the release button (shown in Figure 2-7 ) on the front bezel. The front flap will open in an upward direction.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual Step 5. Lock the flap into place by turning the key-lo ck until the groo ve on its face is pointing down (v ertical orientation). (See Figure 2-8 ) Figure 2-8: Drive Tray Key-lock Rotation Step 6 .
Chapter 3 System Monitoring This chapter provides information on how to monitor th e A12U and A08U RAID subsystems. 3.1 Subsystem Monitoring Overview Both the EonStor A08U-G2421 and A12U -G2421 subsystems are equ ipped with a variety of self-m onitoring fea tures that help to keep s ubsystem managers informed of the subsystem operational status .
EonStor A12U/A08U-G2421 Installa tion and Hardware Reference Manua l Configuration Client function ality are given in the RAIDWatch User’s Manual . • LEDs : Device-status-i ndicating LEDs are placed on all of the s ubsystems’ active components. These LED s inform you of the integr ity of a given component or a give n link.
Chapter 3: M onitoring 3.2 Status-indicating LEDs 3.2.1 Brief Overview of the LEDs The followi ng devices com e with LE Ds that inf orm subsy stem managers a bout the operational st atus of the com ponent on whi ch they are m ounted.
EonStor A12U/A08U-G2421 Installa tion and Hardware Reference Manua l LED Name Color Status 1 Controller Ready Green ON: Indicates controller is active and operating no rm ally. FLASHING: Indicates controller initialization is taking place. OFF: Controll e r is not rea dy for ope rat i o n.
Chapter 3: M onitoring Name Color Status Link Status Green ON: Indicates a vali d connection t o network LAN Activity Gree n BLINKING: Indicates active transmissions Table 3-3: Ethernet Port LED Definitio n s 3.2.4 LCD Keypad Panel The LCD pan el located on the front alumi num foldable handle c omes wit h three status LEDs.
EonStor A12U/A08U-G2421 Installa tion and Hardware Reference Manua l 3.2.5 Drive Tray LEDs Two LED indicators a re located on the right side of each drive tray.
Chapter 3: M onitoring 3.2.6 BBU Module LED The BBU module has an LE D on its faceplate. (See Figure 3-5 ) The function is the same as the fi fth LED on the control ler module. The LED is off whe n the BBU is functioning normally and is able to sust ain the cache m emory.
EonStor A12U/A08U-G2421 Installa tion and Hardware Reference Manua l Figure 3-7: Cooling Fa n Module LED RED Status OFF The cooling fa n module i s operat ing normal ly.
Chapter 3: M onitoring 3.3.1 Default Threshold Values NOTE: The threshold values listed below are used to trigger a warning even t and sound the alarm. A different va lue set is reserved for triggering the cooling fa ns to operate at a high rot ation s peed.
EonStor A12U/A08U-G2421 Installa tion and Hardware Reference Manua l 3.4 I 2 C Monitoring Module pres ence detection a nd the general wor king status o f cooling fan and other modules a re monito red thro ugh an I 2 C serial bus.
Chapter 4: Connection and Operation Chapter 4 System Connection and Operation This chapter intro duces sample topolog ies, configuration optio ns and server connections f or the Eo nStor subsy stems and discusses b oth the p ower on an d power off procedures.
EonStor A12U/A08U-G2421 Installa tio n and Hardware Reference Manual Figure 4- 1: SCSI Connectors o n th e Controller Rear Panel 4.1.3 SCSI Termination Correct SCSI termination procedures require that the last devi ce on the SCSI bus be terminated.
Chapter 4: Connection and Operation 4.2 Host Connection Topology 4.2.1 Single Host Figure 4-2: Single SCSI Con tro ller Connected to a Single Host Comp u ter In the ex ample sh own in Figure 4- 2 , the SCSI ports are c onnected to two adapters on a host comput er to provi de path re dundancy.
EonStor A12U/A08U-G2421 Installa tio n and Hardware Reference Manual 4.2.2 Dual Hosts Figure 4- 3: Cascaded Subsystems Connected to Two Host Computers In the ex ample shown in Figure 4- 3 , the SCSI ports are connected to different host computers. T his pro vides both path an d host com puter re dundancy.
Chapter 4: Connection and Operation Hard drives: Hard drives have been correctly installed on the drive trays. Drive trays: ALL the drive trays, whet her or not t hey have a hard drive, have been installed into the su bsystem. Cable connections: The host ports on the subsystem have been correctly connected to host computer(s ).
EonStor A12U/A08U-G2421 Installa tio n and Hardware Reference Manual Figure 4- 4: Subsystem Po wer Switch es CAUTION! Although the PS Us are redundant and a single PSU can provide sufficient po wer to the system, it is advisable to tu rn both the power switches on.
Chapter 4: Connection and Operation 4.3.5 LCD Screen When powering on the subsystem, the following message s should app ear on the front panel LCD scr een. Wait for t he front panel LCD to show “ READY ” or “ No Host LUN ” before the host boots up.
EonStor A12U/A08U-G2421 Installa tio n and Hardware Reference Manual 4.4 Power Off Procedure If you wish to power down the subsystem, please follow these steps: NOTE: If you wish t o power down t he subsystem, p lease ensure that no time-co nsuming processes, like “Regenerate Logical Drive Parity” or a “Media Scan,” are taking place.
Chapter 4: Connection and Operation CHAPTER 4 SYSTEM CONNECTION AND OPER ATION ...................................................... 1 4.1 SCSI C ONNECTION O VERVIEW ....................................................................................
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual 4.3.5 LCD Screen When powering on the subsystem, the following message s should app ear on the front panel LCD scr een. Wait for t he front panel LCD to show “ READY ” or “ No Host LUN ” before the host boots up.
Chapter 4: Connection and Operati on 4.4 Power Off Procedure If you wish to power down the subsystem , please follow t hese steps: NOTE: If you wish t o power down t he subsystem, p lease ensure that no time-co nsuming processes, like “Regenerate Logical Drive Parity” or a “Media Scan,” are taking place.
Chapter 5 System Maintenance 5.1 Overview 5.1.1 About Subsystem Maintenance Constant monitoring and maintenance of you r SATA-based subsystems will minimize the chance of syst em downtime and preserve the working integrity of the system for a lon ger period o f time.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual • Qualified engineers who are familiar with the subsystem should be the only ones who make c omponent replacem ents.
Chapter 5: System Maintenance 5.2.2 Notes on Controller Module Maintenance • The controll er modul e contains a DIMM modul e. It is not rec ommended t o re- use the DIMM module extracted from a failed control ler unless you ha ve a similar RAID subsystem that can be used to test the module.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Figure 5- 1: Loosen Controller Module Re tention Screws Step 5. Pull the co ntroller module out: Once the retention screws have been removed; ge ntly pull the cont roller m odule out of the subsy stem chassis.
Chapter 5: System Maintenance 5.3 Replacing or Upgrading Memory Modules 5.3.1 Memory Module Installation Overview The subsystem s come with a pre- installed 256MB (or above) DDR RAM DIMM modul e on the cont roller. The c ontroller s upports o ne memory module for the capaci ty up to 1GB.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual 5.3.3 DIMM Module Installation WARNING! The pre-installed modules must be re moved prior to installing n ew memory modules. Do this with care. Sensitive components can be damag ed during the process.
Chapter 5: System Maintenance Figure 5 -3: Insert the DIMM Module Step 5. Reinstall the controller module . After the DIM M modul e has been properly instal led, the contr oller modul e must be rei nstalled. T o do this, align t he controll er modul e with the c ontrolle r module bay .
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual 5.4 Replacing a Faulty BBU IMPORTANT! The BBU is hot-swappable, can be replaced while the subsystem is runn ing. However, a new module w ill only be reco gnized after a subsystem reset.
Chapter 5: System Maintenance Step 4. Once the new BB U module is correct ly install ed into t he subsy stem, the LED should start flashing, indi cates the BBU is being charged. When the BBU is fully ch arg ed, the LED will go off. 5.5 Replacing a Failed PSU Module 5.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Step 3. Remove the retention screw: After the power ca ble has bee n removed from the power c onnector , remove t he retentio n screw at the upper right side of the P SU rear-end panel .
Chapter 5: System Maintenance Figure 5- 8: Dislodging th e PSU Step 5. Remove the cooling mod ule: To do this, push the clips on eith er side of the m odule rear pa nel together. Then gentl y pull th e cooling module out of the lowe r level of the PSU bracket.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual enclosure’s re ar panel. To firm ly secure the PSUs into place , reinsert the retention screw. Step 9. Reconnect the power cord and turn the power on: Plug the power cord into the socket on the PSU module an d turn t he PSU m odule power switch on.
Chapter 5: System Maintenance Step 1. To remove the coo ling fan module: Squeeze both side latches towards the center of the cool ing fan m odule and gently wit hdraw the cooling fan module from the su bsystem by gently pulling on the silver handle at the bottom.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Figure 5- 11: Forearm Han d le Locking Mechan ism Front flap mechanism: Do not leave a drive tray ’s front flap open. The front flap a nd its key-lock secure a drive tray to chassis slot .
Chapter 5: System Maintenance 5.7.2 Replacing a Failed Hard Drive To replace a hard drive, please follow these steps: WARNING! Hard drives are fragile. Please always h andle hard drives with extreme care. Do not drop the h ard drives; al ways be slow, gent le and caref ul when handli ng a hard drive.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Figure 5-13: Drive Tray Key-Lock Rotation Step 4. Remove the drive tray along with the hard drive in it. O n c e t h e drive tray is dislodged from th e chassis, gently and carefully withdraw the driv e tray from the chassis.
Appendix A Subsystem Specifications A.1 Technical Specifications Environmental Specifications Humidity 5 to 95% (non condensing – operating and non-operating) Temperature Operating : 0º to 40ºC No.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual System Weight Net weight: 23.5kg Gross weight: 25.0kg (without disk drives) EMI/EMC • FCC Class-B • CE Safety Requirements • UL • CB Shock Half-sine Operating: 5G peak, 11ms duration Non-operating: 15G, 11ms, half-sine Vibration Operating 0.
Appendix A: Subsystem Features A.2 Controller Specifications A.2.1 Configuration Specification RAID Levels 0, 1(0 + 1), 3, 5, 10, 30, 50, JBOD, and non-RAID disk spanning Host OS Compatibility Host OS.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual A.3 Drive Tray Specifications Specification Height 28mm Width 110mm Depth 218.92mm Key Lock Yes A.4 Power Supply Specifications Specification Nominal Power 350W DC Output 12.0V: 25A 5.
Appendix A: Subsystem Features A.6 RAID Management Specification Configuration • LCD keypad panel • Text-based firmware-embedded utility over RS- 232C connection through the included audio jack- t.
EonStor A08U/A12U-G2421 Instal lation and Hardware Reference Manual Concurrent rebuild on Multiple Drives in a RAID (0 + 1) Logical Drive Yes Salvage the 2 nd Temporarily Failed Drive in a RAID 1, 3 o.
Appendix B Spare Parts and Accessories B.1 Spare Parts B.1.1 Spare Parts Overview Except the RA ID control ler m odule, all the active compo nents in the subsystem s can be replaced while the system is running. If any of these co mponents fails then it can, if configure d in a fully re dundant m ode, be hot-swa pped.
EonStor A12U/A08U-G2421 Instal lation and Hardware Reference Manual B.1.3 Controller Modules Model Name Description IFT-82AU24GD08 SCSI-to-SATA RA ID cont roller m odule, 2 x SCSI-320 host chann els, 8 x SATA II drive channels.
Appendix B: Spare Parts and Accessories B.2 Accessories and Optional Items B.2.1 Accessories Overview A number of accessory items are availa ble for the E onSto r A08U/A12U-G2421 subsystem. Some of these accessory items come with the subsystem; b ut if damaged or if more accessory items are neede d, th ey can be orde red separately .
Appendix C Pinouts C.1. SCSI Port: VHDCI Connector Pinouts The SCSI port connector pinouts com ply with specifi cations in T10 Working Draft, Project 1365D, SCSI Parallel Interface-4.
EonStor A08U/A12U-G2421 Installat ion and Hardware Reference Manual 27 SSEL+ 61 SSEL- 28 SC_D+ 62 SC_D- 29 SREQ+ 63 SREQ- 30 SI_O+ 64 SI_O- 31 SD8+ 65 SD8- 32 SD9+ 66 SD9- 33 SD10+ 67 SD10- 34 SD11+ 68 SD11- C.
Appendix C Pinouts NOTE: A null modem is used for wire-swap and is necessary for connecting in between COM1CN2 and a PC serial port. C.3. IFT-9011 Null Modem Swap Pin 2 and Pin 3 Swap Pin 4 and Pin 6 Swap Pin 7 and Pin 8 Table -2: Null Modem Pinouts C.
Index Drive Trays, 3-3 dummy plate, 2-9 - A - accessory items, 2-6 - E - Air Flow, A-4 ejection handle, 5-10 Airflow, 2-2 electrostatic discharge, 2-1 airflow clearance, 2-2 Ethernet link, 1-14 Ambien.
EonStor A08U-C2411 Installation and Hardware Reference Manual lower level, 2-6 - M - media scan, 4-11 memory module, 4-7 mini-SCSI connector, 1-9 Model Variations, 1-2 - N - normalized airflow, 1-15, .
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 Infortrend A12U/A08U-G2421 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 Infortrend A12U/A08U-G2421 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Infortrend A12U/A08U-G2421, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Infortrend A12U/A08U-G2421 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Infortrend A12U/A08U-G2421, 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 Infortrend A12U/A08U-G2421.
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 Infortrend A12U/A08U-G2421. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Infortrend A12U/A08U-G2421 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.
