APCメーカーiSCSI SATA IIの使用説明書/サービス説明書
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iSCSI – SATA II RAID SUBSYSTEM Installation and Configuration Manual Revision 1.0 P/N: PW0020000000328.
[2] Table of Contents Chapter 1 Introduction ........................................................................................... 4 1.1 Key Features ............................................. .................................................
[3] 3.5.1 Entit y Property ........................................ ............................................................... ................................. 38 3.5.2 NIC.................................................... ....................
[4] Chapter 1 Introduction The iSCSI RAID Subsystem The iSCSI RAID subsystem is a 4 -bay disk array based on hardware RAID configuration. It is an easy-to-use storage system which can be co nfigured to any RAID level. It provides reliable dat a protection f or servers, and the RAID 6 function is available.
[5] 1.1 Key Features ¾ Front-end 2 x 1Gigabit port full iSC SI offload ¾ Supports iSCSI jumbo frame ¾ Supports RAID levels 0, 1, 0+1, 3, 5, 6 , 10 and JBOD ¾ Global hot spare disks ¾ Write-throug.
[6] 1.2 Technical Specifications Form Factor ： 1U 19-inch rackmount chassis RAID processor ： Intel XScale IOP331 Instant RAID volu me availabilit y and background initializ ation su pport RAID Level ： 0, 1, 0+1, 3, 5, 6, 10 and JBOD Supports over 2TB per volume Cache memory ： 512MB ~ 1GB DDR333 DIMM supported Online consisten cy check No.
[7] 1.3 Terminology The document uses the following terms: RAID RAID is the abbreviation of “R edundant A rray of I ndependent D isks ” . There are different RAID level s with different degree of the data protection, data availability, and performance to host environment.
[8] DS D edicated S pare disks. The spare disks ar e only used by one specific RG. Others could not use these dedicated spare disks for any rebuilding purpose.
[9] 1.4 RAID Concepts RAID Fundamentals The basic idea of RAID (Redundant Array of Independent Disks) is to combine multipl e inexpensive disk driv es into an array of disk drives to obtain performance, capacity and reliability that exceeds that of a single large drive.
[10] Definition of RAID Levels RAID 0 is typically defined as a group o f stripe d disk drives without parity or data redundancy. RAID 0 arrays can be config ured with large stripes for multi-us er environments or small stripe s for single-user systems th at access long sequential records.
[11] RAID 3 sector-stripes data acros s groups of drives, but one drive in the group is dedicated to storing parity information. RA ID 3 relies on the embedded ECC in each sector for error detection.
[12] Dual-level RAI D achieves a balance between the incr eased data availability inherent in RAID 1 and RAID 5 and the increased read performance inherent i n disk striping (RAID 0). These arrays are sometimes referred to as RAID 0 +1 or RAID 10 and RAID 0+5 or RAID 50.
[13] RAID Management The subsystem can implement sev eral different levels of RAID technology . RAID levels supported by the subsystem are shown below. RAID Level Description Min. Drives 0 Block striping is provid e, which yields higher performance than with individual drives.
[14] 1.5 Volume Relationship Diagram This diagram shows how the volume st ructure of the iSCSI RAID subsystem is designed. It describes the relationship of RAID compo nents. One RG (RAID group) consists of a set of VDs (Vi rtual disk) and owns one RAID le vel attribute.
[15] Chapter 2 Getting Started 2.1 Packaging, Shipment and Delivery Before removing the subsystem from the shipping carton, you should visually inspect the physical condit ion of the shipping cart on. Unpack the subsystem and verify that th e co ntents of the shipping carton are all there and in good cond it ion.
[16] 2.3 Identifying Parts of the iSCSI RAID Subsystem The illustrations below iden tify the various parts of the su bsystem. 2.3.1 Front View 1 Carrier Open Butt on – Use this to open the disk tray. Press the butt on to open. This button also shows the Lock Ind icat or .
[17] 5 LCD Display Panel 6 LCD Control Module (LCM) Use the function keys to navigate t hrough the menu options avail able in the LCM. Parts Function Up and Down Arrow buttons Use the Up or Down arrow keys to go through the i nformation on the LCD screen.
[18] 2.3.2 Rear View 1. Uninterruptible Power Su pply (UPS) Port (APC Smart UP S only) The subsystem may come wi th an optional UPS port all owing you to connect a APC Smart UPS device. Connect the cable from the UPS device to the UPS port located at the rear of the subsystem.
[19] 2.4 Connecting the iSCSI RA ID Subsystem to Your Network To connect the iSCSI uni t to the network, insert the ca ble that came with the u nit into the Gigabit networ k port (LAN1) on the ba ck of iSCSI unit. Insert the other end into a Gigabi t BASE-T Ethernet connection on your network hub or swi tch.
[20] 2.6 Installing Hard Drives The expansion chassis supports hot-swa pping allowing you to inst all or replace a hard drive while the s ubsystem is running. Each Drive Carrier has a locking mechanis m. When the Lock Gr oove is hori zontal, this indicates that the Driv e Carrier is locked.
[21] 2.7 iSCSI Introduction iSCSI (Intern et SCSI) is a protocol wh ic h encapsulates SCSI (Sm all Computer System Interface) commands and data in T CP/IP packets for linking stora ge devices with servers over common IP in frastructure s. iSCSI provi des high performance SANs over standard IP netw orks like LAN, WAN or the Internet.
[22] 1. Link to download t he Microsoft iSCSI softw are initiator: http://www.microsoft.com/downl oads/details.aspx?FamilyID=12cb3c1a-15d6- 4585-b385-befd1319f825&DisplayLang=en Please refer to Appendix D for Microsoft iSCSI initiator installation procedur e.
[23] http://192.168.10 .50 or https://192.168.10.50 (https : connection w ith encr ypted Secure Sockets La yer (SSL). Please be aware of the https function is sl ower than http.) Click any funct ion at the f irst time; it will pop up a dialog t o authenticate cu rrent user.
[24] 2.9 Enclosure 2.9.1 LCD Control Module (LCM) There are four buttons to control the subsys tem LCM (LCD Control Module). These are: c (Up) d (Down) (Enter) (Escape) After booting up the system , the following screen sho ws management port IP and model name: 192.
[25] The following is the LCM menu hierarchy. [Firmware Version] [System Info.] [RAM Size] [Alarm Mute] [ c Yes N o d ] [Reset] [ c Yes No d ] [Reset/Shutdown] [Shu tdown] [ c Yes No d ] [Quick Instal.
[26] 2.9.2 System Buzzer The system buzzer features are described as follows: 1. The system buzzer alarms 1 second wh en system boots up suc cessfully. 2. The system buzzer alarms continuous ly when there is error level event happened. The alarm will be stopped after mute.
[27] Chapter 3 W eb GUI Guideline 3.1 iSCSI RAID Subsystem GU I Hierarchy The below table is the hierar chy of the subsystem GUI. Quick installation Æ Step 1 / Step 2 / Confirm System configuration S.
[28] Reboot and shutdown Æ Reboot / Shutdown Logout Sure to logout? 3.2 Login The iSCSI RAID subsystem su pports graphical user int erface (GUI) to operate the system. Be sure to connect the LAN cable. The default IP setti ng is DHCP ; open web browser and enter: http://192.
[29] 3.2.1 Language Before clicking the Login button, you can ch ange the GUI l anguage if needed. There are 4 options to select: English , Simplified Chinese, German , and French. 3.2.2 Status Indicators There are six indicators at the top-right corner .
[30] 3.3 Quick Install It is easy to use “Qui ck install” to create a volume. It uses whole physical disks to create a RG. The system will calcu late maximum spaces on RAID levels 0/1/3/5/6/ 0+1. “Quick install” will occupy all residual RG space for on e VD, and it has no space for spare disk.
[31] 3.4 System Configuration “Sys tem co nfig urat ion” is designed for setting up the “System s etting” , “IP address” , “Login setting” , “M ai l setting” , and “Notification setting” .
[32] 3.4.1 System Setting Select “System setting” to change system name and date. Default s ystem name is the model name, e.g.: SB-1404-G1A3. Check “Change date and time” option to set up the current date, time, and ti me zone before using, or sync hronize time from NTP (Network Ti me Protocol) server.
[33] 3.4.2 IP Address Select “IP address” to change IP address for remote admini stration usage. There are 2 options, DHCP (Get IP address from DHCP ser ver) or Static (static IP). The default setting is DHCP e nabled. User can change the HTTP, HTTPS, and SSH port number when the default port number is not allowed on host/serv er.
[34] 3.4.3 Login Setting Select “Login setting” to set s ingle admin login, set the au to logout timing, and change admin or user password. The single admi n login can prevent m ultiple users to access the same iSCSI RAID system at the sa me time.
[35] 3.4.4 Mail Setting Select “Mail setting” to enter at most 3 mail addresses for receiving event notifications. Some ma il servers would check “Mail- from address” and need authenticat ion for anti-spam. Please fill t he necessary fields and select “Send test mail” to check whether the email works fine.
[36] 3.4.5 Notification Setting You can use “Notification setting” to set up SNMP trap for sending alerts via SNMP , pop-up messages via Wi ndows Messenger (not MSN), and alerts via syslog pr otocol, and set event log filter. “SNMP” allows up to 3 SNMP tra p addresses.
[37] Using “Messenger” , user must enable the service “Messe nger” in Windows (Start Æ Control Panel Æ Administrative Tools Æ Services Æ Messenger), and then event l ogs can be received. It allows up to 3 messe nger addresses. User can choose the event log levels.
[38] 3.5 iSCSI Config “iSCSI config” selection is for the setup of “Entity Pr operty” , “NIC” , “Node” , “Session” , and “CHAP account” . 3.5.1 Entity Property Select “Entity property” to view the enti ty name of the iSCSI RAID subs ystem, and setup “iSNS IP” for iSNS (I nternet Storage Name Service) service.
[39] 3.5.2 NIC Select “NIC” to change IP addresses of iSCSI da ta ports. There are two gigabit LAN ports to transmit data. Each of them must be assigned one IP a ddress in multi-home d mode. The screen sh ot above show s the 2 iSCSI dat a ports. Each of th em is set to st at ic IP.
[40] 3.5.3 Node Select “Node” to view the target name for iSCSI node. Press “Authenticate” to enable CHAP authentication. CHAP is the abbreviation of Challenge Han dshake Authorization Protocol. CHAP is a strong authe ntication method used in point-to-point for user login.
[41] 3.5.4 Session “Session” function can display iSCSI session an d connection information, including the following it ems: 1. Host (Initiator Name) 2. Error Recovery Level 3. Error Recovery Count 4. Detail of Authentication status and Source IP: port number.
[42] 3.5.5 CHAP Account Enter “CHAP account” function to create a CHAP account for authentication. To setup CHAP account, please follow these steps: 1. Click “ ”. 2. Enter account name in “User” box, and type the secret in “Secret” and “Confirm” bo x es.
[43] 3.6 Volume Configuration “Volume configur ation” is designed for setting u p the volume configurat ion which includes “Volume create wizard” , “Physical disk” , “RAID grou p” , “Virtu al disk” , “Snapshot”, and “Logical unit” .
[44] 3.6.1 Volume Create Wizard “Volume create wizard” has a smarter policy. When the system is inserted with some HDDs. “Volume creat e wizard” lists all possibilit ies and siz es in different RAID levels, it wi ll use all a vailable HD Ds for RAID level dep ends on which u ser chooses.
[45] Step 3: Deci de VD size. User can enter a num be r less or equal to the default number. Then click “ ”. Step 4: Confirm page. Click “ ” if all setups are correct. Then a VD will be created. It’s done. You can sta rt to use the system no w.
[46] 3.6.2 Physical Disk Enter “Physical disk” to view t he status of hard dr ives inserted in the system. The following are operation t ips: 1. Move the mouse pointer to the gray butt o n n e x t t o t h e n u m b e r o f s l o t , i t will show the fu nctions which can be executed.
[47] It’s done. View the “Physical disk” page. Physical disks of slots 1, 2, and 3 are used for RG named “QUICK37598”. Slot 4 is set as dedicated spare di sk for RG “QUICK37598”. PD column description: Slot The position of hard drives. T he button next to the number of slot shows the functions which can be executed.
[48] a global spare of all RGs. “RS” Æ R e S erve. The hard drive contains the RG information but cannot be used. It may be caused by an uncompleted RG set, or hot-plug of this disk in the running time. In order to protect t he data in the disk, the status changes to reserve.
[49] 3.6.3 RAID Group Enter “Volume group” to view the status of e ach volume group. The following is an example of how to create a RG: Step 1: Click “ ”, enter “Name” , choose “RAI D level” , click “ ” to select PD. Then click “ ”.
[50] RG column description: No. Number of RAID group. The butto n next to the No. s hows the functions which can be executed. Name RAID group name. Total(GB) Total capacity of this RAID group. Free(GB) Free capacity of this RAID group. #PD The number of physical disks in RAID group.
[51] RG operations description: Create Create a RAID group. Migrate Migrate a RAID group. Please refer to succeeding c hapter for more detail. Activate Activate a RAID grou p; it can be executed whe n RG status is offline. Th is is for online roaming pu rpose.
[52] 3.6.4 Virtual Disk Enter “Virtua l disk” function to v iew the status of each user data volume. The following is an example of how to create a VD: Step 1: C lick “ ”, ente r “Name” , .
[53] Right “WT” Æ W rite T hrough. “WB” Æ W rite B ack. “RO” Æ R ead O nly. Priority “HI” Æ HI gh priority. “MD” Æ M i D priority. “LO” Æ LO w priority. Bg rate Background task priority. “4 / 3 / 2 / 1 / 0” Æ Default value is 4.
[54] UDV operations description: Extend Extend a Virtual disk capaci ty. Scrub Scrub a Virtual disk. It’s a pari ty re generation function. It supports RAID 3 / 5 / 6 only. Delete Del ete a Virtual disk. Set property Change the VD name, righ t, priority and bg rate.
[55] 3.6.5 Logical Unit Enter “Logical unit” f unction to view the status of attached logical uni t number of each VD. User can attach LUN by clicking the “ ”.
[56] 3.6.6 Example The following is an example for creating vo lum es. Example 1 is to create two VDs and set a global spare disk. ¾ Example 1 Example 1 is to create two VDs in one RG, each VD uses global cache volume. Global cache volume is created after system boots up automatically .
[57] Step 2: Create VD (Virt ual disk). To create a volume, please follow these steps: 1. Select “/ Volume configuration / Virtual disk” . 2. Click “ ”. 3. Input a VD name, choose a RG Name and enter a size of VD; decide the stripe high, block size, read/write mode and set pri ority , finally click “ “.
[58] Step 3: Atta ch LU N t o VD. There are 2 methods to attach LUN to VD . 1. In “/ Volume configuration / Virtual disk” , mo ve the mouse pointer to the gra y button next to the VD number; cl ick “ Attac h LUN” . 2. In “/ Volume confi guration / Logical unit ” , click “ ”.
[59] Step 4: Set global spare disk. To set a global spare disk , please follow the step. 1. Select “/ Volume configuration / Physic al disk” . 2. Move the mouse pointer to the gr ay button ne xt to the PD slot; cli ck “Set Global spare” . 3. “GS” icon is shown in “Usage” column.
[60] Step 7: Delete VD (Vi rtual disk). T o delete the Virtual disk , please follow the steps: 1. Select “/ Volume configuration / Virtual disk” . 2. Move the mouse poi nter to the gra y button next to the VD number; click “Delete” . There will pop up a confirmation page, click “OK” .
[61] 3.7 Enclosure Management “Enclosure manage ment” function allo ws managing encl osure information including “SES config” , “Hardware monitor” , “S.
[62] 3.7.1 SES Configuration SES represents S CSI E nclosure S ervices, one of the enclosure manag ement standards. Use “SES conf ig” function to enable or disabl e the management of SES. To enable SES: 1. Click “Enable”. 2. Enter Host name (iSCSI no de name).
[63] 3.7.2 Hardware Monitor Enter “Hardware m o nitor” func tion to view the informatio n of current voltage, temperature, power supply, and fa n status. If “Auto shutdown” has been checked, the system wi ll shutdown automaticall y when voltage or temperature is out of the normal range.
[64] 3.7.3 Hard Drive S.M.A.R.T. Function S.M.A.R.T. ( S elf- M onitoring A nalysis and R epor tin g T echn ology) is a diagnostic too l for hard drives to deliv er warning of drive fai lures in advance. S.M .A.R.T. provides users chances to take a ctions be fore possible drive failure.
[65] 3.7.4 UPS Enter “UPS” fu nction to set up UP S ( U ninterruptibl e P ower S upply). Currently, the system only support and commu nicate with smart-UPS f unction of APC (American Power Conversi on Corp.) UPS. Please check detail from http://www.
[66] 3.8 System Maintenance “Maintenance” allows the operation of system functions wh ich include “System information” to show the system version, “Upgr ade” to update firmware to latest v.
[67] 3.8.2 Upgrade “Upgrade” can upgrade firmware. Please pr epare new firmware file named “xxxx.bin” in local hard drive, then click “ ” to select the file.
[68] 3.8.4 Config Import & Export Use “Import and export” f u n c t i o n t o i m p o r t o r e x po rt c o n f i g u r a t i o n . “ E xp o rt ” a l l o w s user to save system configuration v alues, and “Import” to apply sav ed configuration.
[69] 3.8.5 Event Log Use “Event log” to view the system event messa ges. Check the INFO, WARNING, and ERROR checkboxes to choose the leve l of event log t o display. Clicking “ ” button will save the wh ole event log as a text f ile with file name “log-ModelName-Date-Time .
[70] 3.8.6 Reboot and Shutdown “Reboot and shutdown” displays “Reboot” and “Shutdown” buttons. Before power off, it is better to execute “Shutdown” to fl ush the data from cache to physi cal disks. The step is necessary for data protection.
[71] Chapter 4 Advanced Operation 4.1 Rebuild If one physical disk of a Raid Group, which is set to a protected RAID level ( e.g.: RAID 3 , R A I D 5 , o r R A I D 6 ) , i s F A I L E D o r h a s b e e n u n p l u g g e d / r e m o v e d , t h e R G s t a t u s i s changed to degraded mode.
[72] Sometimes, rebuild is called recover; thes e two have the same me aning. The foll owing table is the relationship bet w een RAID levels and rebuild. RAID 0 Disk striping. No protection for data. RG fail s if any hard drive fails or unplugs. RAID 1 Disk mirroring over 2 disks.
[73] 4.2 RG Migration To migrate the RAID level, pl ease follow below procedures. 1. Select “/ Volume configuration / RAI D group” . 2. Move the mouse poi nter to the gr ay button next to t he RG number; click “Migrate” . 3. Change the RAID level by clicking the down arrow t o “RAID 5 ” .
[74] 6. Migration starts and it can be seen from the “status” o f a R G w i t h “Migrating” . In “/ Volume configuration / Virtual disk” , it displays a “Migrating” in “Sta tus” and complete percentage of migration in “R%” . To do migration, the tot al size of RG must be larger or equ al to the original RG.
[75] 4.3 VD Extension To extend VD size, please follow the procedures. 1. Select “/ Volume configuration / Virtual disk” . 2. Move the mouse poi nter to the gra y button next to the VD number; click “Extend” . 3. Change the size. The size must be larger th an the original, an d then click “ “ to start extension.
[76] 4.5 Disk Roaming Physical disks can be re-sequenced in the same system or move all ph ysical disks from system-1 to system-2. This is called disk roaming. System can execute disk roaming online. Please follow the procedures. 1. Select “/ Volume configuration / RAI D group” .
[77] Appendix A. Certification List RAM RAM Spec: 184pins, DDR333(PC2700), Reg. (register) or UB(Unbufferred), ECC or Non-ECC, from 64MB to 1GB, 32-bit or 64-bit data bus width, x8 or x16 devices, 9 to 11 bits column address.
[78] build-in iSCSI initiator iscsi-i nitiator-utils-4.0.3.0-4 in kernel 2.6.9 3. For Red Hat Enterprise Linux 5 (Kernel 2.6), use the build-in iSCSI initiator iscsi -initiator-utils-6.2.0.742- 0.5.el5 in kernel 2.6.18 Mac ATTO Xtend SAN iSC SI initiator v3.
[79] Hard drive Vendor Model Hitachi Deskstar 7K250, HDS722580VLSA80, 80GB, 72 00RPM, SATA, 8M Hitachi Deskstar E7K500, HDS 725050KLA360, 500GB, 7200RPM, SATA II, 16M Hitachi Deskstar 7K80, HDS728040P.
[80] B. Event Notifications PD events Level Type Description INFO Disk inserted Disk <slot> is inserted into system. WARNING Disk removed Disk <slot> is removed from sy stem. ERROR HDD failure Disk <slot > is disabled. HW events Level Type Description WARNING ECC error Single-bit ECC error is detected.
[81] auto shutdown immediately. WARNING SMART T.E.C. Disk <slot> S. M.A.R.T. Threshold Exceed Condition occurred f or attribute <item>. WARNING SMART failure Disk <slot>: Failu re t o get S.
[82] started INFO VD migration finished VD <name> completes migration. ERROR VD migration failed Fail ed to complete migration of VD <name>. INFO VD scrubbing started VD <name> starts scrubbing. INFO VD scrubbing finished VD <name> completes scrubbing.
[83] imported. INFO RG restored Configuration of RG <name> has been restored. INFO VD restored Configurati on of VD <name> has b een restored. iSCSI events Level Type Description INFO iSCSI login succeeds iSCSI login from <IP> succeeds.
[84] occurred <address> of JBOD <number> PD <slot>. WARNING PD write error occurred Write error occurred at LBA <address>- <address> of JBOD <number> PD <slot>. INFO PD freed JBOD <number> PD <slot> has been removed from RG <name>.
[85] D. Microsoft iSCSI Initiator Here are the steps to setup Mi crosoft iSCSI Initiator . Please visit Microsoft websi te for latest iSCSI initiat or . T he following set u p may not use the latest Microsoft iSCSI initiato r . 1. Run Microsoft iSCSI Init iat or .
[86] 4. Click “OK” . 5. Click “Targets” ..
[87] 6. Click “Log On” . Check “Enable multi-path” if running MPIO . 7. Click “Advance” if CHAP information is needed. 8. Click “OK” . The status would be “Connected” .
[88] The following procedu re is to log off iSCSI device. a. Click “Details” . b. Check the Identifier , which will be delet ed. c. Click “Log of f” .
[89] E. Installation Steps fo r Large Volume (Over 2TB) Introduction: The iSCSI RAID subsystem is capable of supportin g large volumes (>2TB). When connecting controllers to 64bit OS installed host/server, the host/server is inherently capable for large volumes from the 64bit addr ess.
[90] Step 3: Initialize/F o rm at/Moun t the disk 1. Go to Start Æ Control P anel Æ Computer Management Æ Disk Manag ement, it displays a new disk. 2. Initialize th e disk. 3. Convert to GPT disk for over 2TB capacity . For more detail information about GPT , please visit http://www .
[91] 4. For m a t t h e di s k . 5. Done. 6. The new disk is ready to use, the a vailable size = 2.72TB. WARNING: If user setups 512B block size for VD and the host/server OS is 32bit, in the last step of for matting disk, user will find OS cannot format t he disk sector after 2048GB (2TB).
[92] 7. W rong setting result: OS can not fo rmat disk sector after 2048GB(2TB). F. MPIO and MC/ S Setup Instructions Here is the instruct ion to setup MPIO. The following network diagrams are the examples. Please follow them to setup the environment.
[93] The MPIO setup in structions are the following: 1. Create RG/VD , and then attach LU N. 2. Add the first “T arget Portal” on Microsoft iSCSI initiator . 3. Add the second “T arget Portal” on Microsoft iSCSI init iator . 4. Logon. 5. Enable “Enable multi- path” checkbox.
デバイスAPC iSCSI SATA II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：
APC iSCSI SATA II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APC iSCSI SATA II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。APC iSCSI SATA II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。APC iSCSI SATA II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。
APC iSCSI SATA II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APC iSCSI SATA II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、APC iSCSI SATA II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APC iSCSI SATA II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。
