IBM 866011U - Netfinity 5500 - 8660, Hardware Maintenance Manual

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Unblocking logical drives:
Whenever the
ServeRAID controller performs a rebuild operation on an
array, the data stored in any RAID level 1 and RAID level 5
logical drives in the array is reconstructed. However, the
data stored in RAID level 0 logical drives in that array
cannot be reconstructed. The data in the RAID level 0
logical drives is blocked when the ServeRAID controller
detects that the array is valid, but the data might be
damaged.
After the rebuild process completes, you can unblock the
RAID level 0 logical drives; this redefines their state as
OKY and allows access to them once again. But
remember, the RAID level 0 logical drive might contain
damaged data. You must re-create, install, or restore the
data for the RAID level 0 logical drive from the most recent
backup disk or tape.
To unblock a blocked drive:
1. Select the logical drive that is blocked from the Main
Menu of the Administration and Monitoring utility
program.
A screen similar to the following appears.
Logical Drive Information
Logical Drive Number 1
Blocked No
Part of Array A
Part of Merge Group 1
Date Created 05/19/97
State OKY
Size 100MB
RAID Level 0
Write Policy WT
Read Ahead On
Strip Unit Size 8 KB
Number of Chunks 3
Stripe Order 1,1 1,2 1,4
Unblock Initialize Synchronize OK
2. Click on Unblock to unblock the drive.
3. You
must initialize all new logical drives before storing
data in them. See with “Initializing logical drives” on
page 36.
4. Restore the data to the drive from the most recent
backup disk or tape.
Logical drive migration administration:
The
logical drive migration (LDM) feature dynamically changes
the current logical drive structure. You can use this
feature to change the RAID level, increase the free space
in a disk array, or change the size of a logical drive.
To use the LDM feature, you must have two logical drives
available: one free (FRE) logical drive and one source
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Netfinity Server HMM