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IBM-AUSTRIA - PC-HW-Support 30 Aug 1999 |
Rebuilding a Logical Drive (ServeRAID)
Rebuilding a Logical Drive
Review the following information before you rebuild a logical drive.
- If the logical drive is critical, you must rebuild the defunct drive.
- Data in a logical drive assigned RAID level 0 is lost during a rebuild. If the drive was backed up
before it failed, you can restore the data to this drive.
- If a physical drive being rebuilt contains logical drives defined as RAID level 1 or 5 and a logical
drive at RAID level 0, the RAID level 0 drive is blocked to external access during the rebuild.
- If you initiated the rebuild through the Administration and Monitoring program, you must unblock the
RAID level 0 drive when the rebuild is complete.
- If you initiated the rebuild through the ServeRAID configuration program and the rebuild was interrupted,
drives with RAID level 0 can be autom. unblocked when you restart the server.
- Only one rebuild operation can take place at a time.
- The drive being rebuilt must be the same size or larger than the failed drive.
- If multiple hot-spare drives are available, the adapter searches all bays on each channel for a hot-spare drive of the appropriate
size, the first one found enters the Rebuild state.
- Under the following circumstances, a Rebuild operation can be completed quickly:
- The defunct (DDD) drive was not defective
- The drive is in the same bay.
- No write operations or configuration changes that require rebuilding
data in the drive have occurred since the hard disk drive entered the DDD state.
If you are using one of the Administration and Monitoring programs provided with the disk-array system, you can
use it to identify the defunct drive and designate a drive to replace the defunct drive without restarting the server.
Refer to the README file on the Administration and Monitoring program for instructions on the operating system.
To replace a faulty drive using the ServeRAID configuration program:
- Start the ServeRAID configuration program. When the Following drives not responding appears,
press F5 to continue loading the ServeRAID configuration program.
- Select Rebuild/Device Management from the Main Menu.
- Select Rebuild Drive from the Rebuild/Device Management menu. The cursor becomes active in the Bay/Array list.
- Select the replacement drive that you want to use for the rebuild operation. A pop-up window appears.
- Select Same Location if you physically replaced a hard disk drive in the same bay.
- Select New Location to assign a hard disk drive in a new location. You will be prompted to select the drive that you want.
Information and status messages about each stage of the rebuilding process appears on the screen.
- When the rebuilding process is completed, press Esc to return to the Main Menu. The new configuration will be saved autom.
- Backup the new configuration (see 'Backing Up the Disk-Array Configuration')
- Select Exit to end the ServeRAID configuration program.
- Remove the diskette and press Ctrl+Alt+Del to restart the system.
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