MaxAttach MaxAttach NAS 4000 Manuel utilisateur
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 1Part Number: 000001844
MaxAttach NAS 4000 Series
MaxAttach NAS 4000 Series OS 2.2
Hard Disk Drive Replacement
DOCUMENT OVERVIEW
Who Should Use This Instruction Set
This MaxAttach NAS 4000 Series by Maxtor HDD Replacement Instruction Set is intended as an
important aid in identifying, and successfully replacing a specific failed drive.
Document Applicability
Use this replacement procedure only for the following systems:
nMaxAttach NAS 4000 Series
nMicrosoft Windows-Powered O/S version 2.2
WARNING
Back up all your user data before using this procedure. Failure to follow the steps
in this procedure may result in loss of all user data, locking up the system, or
both. Be sure of your failed disk diagnosis before attempting any replacement
procedures.
Important Warnings
The procedure involves replacing a disk drive that is a member of a redundant array of
independent disks (RAID), specifically a RAID 5 array which uses spanning and parity writing to
provide enhanced data protection features in the case of a SINGLE disk drive failure.
WARNING
Failure to exactly follow this procedure can lead to the loss of all user data,
system re-boot failure, or both.
General Recommendations
The following recommendations will assist you in diagnosing and replacing the correct failed drive:
nRead and understand this procedure completely before starting any work.
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 2 Part Number: 000001844
nFollow the procedure steps exactly.
nOnce the cover is removed from your system, clearly mark all drives with their physical drive
number. When viewed from the front of the chassis, the drives have the following physical,
logical and RAID 5 definitions:
•First drive on the left - Primary Slave Drive 1 - PS-D1
•Second drive on the left - Secondary Master Drive 2 - SM-D2
•Third drive on the left - Primary Master Drive 0 - PM-D0
•Fourth drive on the left - Secondary Slave Drive 3 - SS-D3
nUse the Identify Disk utility to determine which drive has failed or is missing from the array.
nPerform all prerequisite steps before physically removing the drive from the chassis.
nReplacement drives must be the at least the same size as the failed drive.
•However, during the RAID rebuild process, a larger drive will be automatically re
configured to match the smallest drive in the array so that all drives end up being the same
size.
nMake sure the jumpers on the replacement drive match those on the failed drive.
nKeep the failed drive in a safe place until you have completely restored the system to correct
operation and all data is verified as complete.
nPerform all post installation reconfiguration steps as required.
nIf in doubt, call for technical support.
IdentifyDisk.Exe Utility Requirements
The IdentifyDisk.Exe utility is used to identify missing physical disks from the system arrays.
Running from a DOS shell, it will identify all found and all missing disks.
nUtility Name:
•Identify Disk Utility
nFile Name:
•IdentifyDisk.Exe
nAvailable On:
•Your system located at C:\Drivers
•http://www.maxtor.com/products/MaxAttach/Downloads/downloads.htm
•Download to your client administration system and/or to a floppy disk.
Disk Replacement Requirements
nMaxAttach NAS 4000 Series
nMicrosoft Window-Powered O/S Revision 2.2
nReplacement hard disk drives should be the same model number or same same or higher drive
capacity as the failed drive.
Disk Array Configuration Requirements
These replacement instructions are only applicable for restoring your MaxAttach NAS 4000 Series
to its originally installed configuration of RAID 5 - Striping with Parity Checking (Redundant
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 3 Part Number: 000001844
Array of Independent Disks), and DOES NOT cover other user determined configurations such as
JBOD (Just A Bunch of Disks), RAID 0 - Striping, or RAID 1 Mirroring.
WARNING
If you have re configured your array to another RAID method such as RAID 0,
RAID 1, RAID 0+1, or JBOD, stop and do not continue this procedure. Instead,
call technical support for additional information as to the best way to proceed.
The MaxAttach NAS 4000 Series contains four internal disk drives. To determine the drive size of
your MaxAttach NAS 4000 Series, check the model number on the label of one of the installed
drives. Make sure the replacement drive has at least the same or higher drive capacity as the failed
drive. Make sure the new drive has the jumper settings as the failed drive.
Document Conventions
nAll descriptions of drive locations are when viewed from the front of the unit.
nAll mouse clicks are “left-clicks” unless otherwise specified as “right-clicks.”
nObjects of user actions taken by the user are in bold face such as “click on the OK button.”
nThe names of screens, windows, figures, and dialog boxes are initalics such as “the Disk and
Volumes Status screen appears.”
nCommands typed in the user, usually in a DOS shell interface, are entered asCourier text
as in “to find the IdentifyDisk.Exe utility, type dir at the C:\> prompt.
IDE Interface
Configuration of the drives is displayed in the figure below. The board uses the ATA-100
controller on the south bridge. This model has two IDE connectors along the edge of the
motherboard. Effectively, the edge of the motherboard supports data. Each drive gets data from
this motherboard connector with two identical sets of data cables.
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 4 Part Number: 000001844
Figure 1: MaxAttach NAS 4000 SeriesHard Disk Drive Interface Configuration From Front
Internal Disk Array Architecture
The factory default disk drive configuration has the following parameters:
nThere are three logical volumes: C:\, D:\, and E:\.
nLogical volumes C:\ and D:\ are reserved for the operating system (O/S).
•Each O/S volume is spread across two physical drives.
•Each O/S volume resides in a partition separate from the user data.
•Each O/S volume is configured as a RAID 1 (Redundant Array of Independent Disks type 1
array) mirrored array.
nLogical volume E:\ is available for user data.
•The user data volume is spread across a larger partition on all four physical drives.
•The user data volume is configured as a four drive RAID 5 array which is a multi disk
striping with parity check array.
FRONT PANEL
POWER
SUPPLY
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 5 Part Number: 000001844
The figure below shows the arrays.
Figure 2: MaxAttach NAS 4000 SeriesO/S Version 2.2 HDD Internal Disk Array Architecture
HDD FAILURE MODES SUMMARY
When a disk drive fails on a MaxAttach NAS 4000 Series, the actions of the system BIOS and the
operating system (O/S) vary depending on the drive that failed. In general, by following the
procedures in this section, you should at least be able to get your system reboot.
nIf the failed drive is the main boot drive, the OS will attempt to switch to another bootable
drive.
nIf any of the other drives fails, the O/S will keep the system running and re-bootable and the
user data available.
nIn both cases above, the RAID array is said to be in a “Degraded” where any additional disk
failure will lead to user data loss.
The table below summarizes drive failure modes and the general necessary actions for recovery.
More detailed failure scenarios for each disk are described in the next section.
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 6 Part Number: 000001844
DETAILED HDD FAILURE MODES
Failure Sequence for Primary Master Drive 0 (PM-D0)
nThe BIOSmarks the drive as missing (“bad”).
nThe system will attempt to boot from the Primary Master Drive 0.
nThe BIOS will keep looking for the Primary Master Drive 0 for three tries.
Table #1 - Disk Drive Failure Modes
Failed Drive
Below
System Boot Disk / Remedial Action Required
Primary
Master Drive 0
PM-D0
Primary
Slave Drive 1
PS-D1
Secondary Master
Drive 2
SM-D2
Secondary Slave
Drive 3
SS-D3
Primary Master
Drive 0 Fails 1. Three boot
attempts from
PM-D0.
3. Replace PM-D0 and
restore mirror from
SM-D2
2. Recovery boot from
SM-D2
Primary Slave
Drive 1 Fails 1. Normal boot from
PM-D0 2. Replace PS-D1 and
restore mirror from
SS-D3
Secondary
Master Drive 2
Fails
1. Normal boot from
PM-D0 2. Replace SM-D2 and
restore mirror from
PM-D0
Secondary
Slave Drive 3
Fails
1. Normal boot from
PM-D0 2. Replace SS-D3 and
restore mirror from
PS-D1
For four failure modes above, the general restoration procedure is: 1. Remove the unit from its rack; 2. Replace
the failed drive; 3. Identify the new disk with a write signature; 4, Upgrade the new disk to a dynamic disk, 5.
Reconnect the new disk to its mirror image; 6. Rebuild the RAID 5 array.
For the failure mode below, no physical disk replacement is required. Instead, the O/S partitions on the Master
Drives must be re-imaged.
Primary Master
Drive 0 &
Secondary
Master Drive 2
O/S Corrupted
1. Three boot
attempts from PM-D0
5. Restore O/S to
PM-D0 from mirror on
SM-D2
3. Recovery boot from
PS-D1
2. Three boot
attempts from SM-D2
4. Restore O/S to
SM-D2 from backup
O/S on PS-D1
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 7 Part Number: 000001844
nA Fatal Error (“blue screen of death”) may be encountered during the reboot tries on the
Primary Master Drive 0.
•The error message will probably be INACCESSIBLE BOOT DEVICE.
•The system will remain locked up for five minutes. It will then attempt to reboot
automatically from the Primary Master Drive 0 three times. If this attempt fails, the system
will reboot from Secondary Master Drive 2.
nIf a successful boot is obtained, the RAID array is now in “critical state” and can tolerate the
loss of no additional disks without permanent user data loss.
nThe system will continue to boot from the Secondary Master Drive 2.
Failure Sequence for Primary Slave Drive 1 (PS-D1)
nThe BIOS marks the drive as missing (“bad”).
nThe BIOS will boot normally starting from the Primary Master Drive 0.
nIf a successful boot is obtained, the RAID array is now in “critical state.” The loss of another
disk drive will lead to permanent user data loss.
nThe system will continue to boot from Primary Master Drive 0.
Failure Sequence for Secondary Master Drive 2 (SM-D2)
nThe BIOS marks the drive as missing (“bad”).
nThe BIOS will boot normally starting from the Primary Master Drive 0.
nIf a successful boot is obtained, the RAID array is now in “critical state.” The loss of another
disk drive will lead to permanent user data loss.
Failure Sequence for Secondary Slave Drive 3 (SS-D3)
nThe BIOS marks the drive as missing (“bad”).
nThe BIOS will boot normally starting from the Primary Master Drive 0.
nIf a successful boot is obtained, the RAID array is now in “critical state.” The loss of another
disk drive will lead to permanent user data loss.
nThe system will continue to boot from Primary Master Drive 0.
IDENTIFY FAILED DRIVE
CAUTION
Use this procedure if your system is running or you know that it will reboot. If you
system will not boot, skip ahead to REBUILD CORRUPTED PRIMARY MASTER
DRIVE 0 (PM-D0) and SECONDARY MASTER DRIVE 1 (SM-D2)below on page
34
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 8 Part Number: 000001844
Identify Drive - Log On
1Log onto the system.
2Use an administrator’s workstation.
•Type in the user name and password.
•Log into the web user interface for the Administration Server Application
Figure 3: Logging onto MaxAttach NAS 4000 SeriesWeb User Interface
3Once the browser appears, navigate to the server.
•Enter either the server name (if it was modified from the factory default) or the IP address
number of the Maxtor appliance into the URL field.
•For example, use http://MA112581 which are the last six digits of the appliance serial
number of 003048112581.
•The serial number can be any combination of alphanumeric characters.
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 9 Part Number: 000001844
Figure 4: Administration Server Application
4Click on Administer this server appliance.
•Another logon dialog box will appear.
•Again type in administrator user name and password.
Identify Drive - Run IdentifyDisk.Exe
5Access the target server through Terminal Services or Web Browser > Maintenance >
Terminal Services.
6Login as Administrator.
7In Terminal Services, go to Start > Run and type in “cmd”to enter the DOS Console.
•Do not use quotes (“) around the letters.
8Change the directory to C:\
•Type C:\ to change to the C:\ drive.
9At the C:\>prompt, type IdentifyDisk followed by the <Enter> key to run the utility.
Click
here
to
log
on
MaxAttach NAS 4000 Series OS 2.2 HDD Replacement 10 Part Number: 000001844
10 The Identify Disk Utility will display a text screen of information and the status of each drive.
Figure 5: IdentifyDisk.Exe DOS Listing Showing All Drives OK
11 A failed drive will be indicated in the display by a “Not Ready” message.
Figure 6: IdentifyDisk.Exe DOS Listing Showing Secondary Master - Drive 2 Not Ready
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