IBM 86624RY Maintenance Manual - Page 166

Guidelines for the rebuild operation, General information about the rebuild, operation

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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 108 for more information.) Before you rebuild a drive, review the following guidelines and general information. Guidelines for the rebuild operation: The replacement hard disk drive must have a capacity equal to or greater than the failed drive. 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 108 for more information.) Data in a logical drive with RAID level-0 is lost during the rebuild operation. If you backed up the data before the drive failed, you can restore the data to the new drive. General information about the rebuild operation: A physical hard disk drive can enter the rebuild state if: You physically replace a defunct drive that is part of the critical logical drive. When you physically replace a defunct drive in a critical logical drive, the ServeRAID adapter or controller rebuilds the data on the new physical drive before it changes the logical drive state back to Okay. The ServeRAID adapter or controller adds a hot-spare or a standby hot-spare drive to the array and changes its state from Hot-Spare or Standby Hot-Spare to Rebuilding. Automatically rebuilding the defunct drive: The ServeRAID adapter or controller will rebuild a defunct drive automatically when all of the following conditions exist: The physical drive that failed is part of a RAID level-1 or RAID level-5 logical drive. A hot-spare or standby hot-spare drive with a capacity equal to or greater than the capacity of the defunct drive is available the moment the drive fails. 158 Netfinity Server HMM

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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
108 for more
information.)
Before you rebuild a drive, review the following guidelines
and general information.
Guidelines for the rebuild operation:
±
The replacement hard disk drive must have a
capacity equal to or greater than the failed drive.
±
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
108 for more
information.)
±
Data in a logical drive with RAID level-0 is lost during
the rebuild operation.
If you backed up the data
before the drive failed, you can restore the data to the
new drive.
General information about the rebuild
operation:
A physical hard disk drive can enter the rebuild state if:
±
You physically replace a defunct drive that is part of
the critical logical drive.
When you physically replace a defunct drive in a
critical logical drive, the ServeRAID adapter or
controller rebuilds the data on the new physical drive
before
it changes the logical drive state back to Okay.
±
The ServeRAID adapter or controller adds a
hot-spare or a standby hot-spare drive to the array
and changes its state from Hot-Spare or Standby
Hot-Spare to Rebuilding.
Automatically rebuilding the defunct drive:
The ServeRAID adapter or controller will rebuild a defunct
drive automatically when all of the following conditions
exist:
±
The physical drive that failed is part of a RAID level-1
or RAID level-5 logical drive.
±
A hot-spare or standby hot-spare drive with a capacity
equal to or greater than the capacity of the defunct
drive is available the moment the drive fails.
158
Netfinity Server HMM