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Rebuilding a Defunct Drive
When a hard disk drive goes defunct (DDD), a Rebuild operation is
required to reconstruct the data for the device in its respective disk
array. The ServeRAID adapters and controllers can reconstruct
RAID level-1 and RAID level-5 logical drives, but they cannot
reconstruct data stored in RAID level-0 logical drives.
To prevent data integrity problems, the ServeRAID adapters and
controllers set the RAID level-0 logical drives to
Blocked during a
Rebuild operation. After the Rebuild operation completes, you can
unblock the RAID level-0 logical drives, and access them once again.
But remember, the logical drive might contain damaged data. (Refer
to “Unblocking Logical Drives” on page 111 for more information.)
Before you rebuild a drive, review the following guidelines and
general information.
Guidelines for the Rebuild Operation
Ÿ
The replacement hard disk drive must have a capacity equal to
or greater than the failed drive.
Ÿ
If the hard disk drive being rebuilt is part of a RAID level-0 logical
drive, the RAID level-0 drive is blocked.
– You must unblock any RAID level-0 logical drives at the end
of the rebuild operation.
– If you use the Administration and Monitoring program to
initiate the rebuild operation, you can unblock the blocked
RAID level-0 drive when the rebuild operation completes.
(See “Unblocking Logical Drives” on page 111 for more
information.)
Ÿ
Data in a logical drive with RAID level-0 is lost during the rebuild
operation. If you backed up your data before the drive failed,
you can restore the data to the new drive.
Chapter 6. Solving ServeRAID Problems
159