This section explains how to recover when a disk drive fails:
• If the pool was protected by a hot spare (see the next section).
• If the pool was
not
protected by a hot spare (see page 151).
• If there is a disk drive failure in more than one pool simultaneously (see page 151).
• If it is a RAID 0 pool (see page 152).
• If multiple disk drives fail within the same pool (see page 152).
Failed Disk Drive Protected by a Hot Spare
When a pool is protected by a hot spare, if a disk drive in that pool fails the hot
spare is automatically incorporated into the pool and takes over for the failed drive.
For instance, when a disk drive fails in a RAID 5 pool, the pool is automatically
rebuilt
(its data is reconstructed) using the hot spare in place of the failed drive. You
can’t access the pool until the rebuilding is complete.
Note
In Adaptec Storage Manager, the color of the hot spare changes from light-
blue to dark-blue, showing that it is now part of a pool.
To recover from the failure:
1
Remove and replace the failed disk drive (following the instructions in “Hot
Swapping Disk Drives” on page 150).
2
Designate a new hot spare to protect the pools on that iSCSI Storage Appliance.
Failed Disk Drive
Not
Protected by a Hot Spare
When a pool is not protected by a hot spare, if a disk drive in that pool fails, remove
and replace the failed disk drive. The controller detects the new disk drive and
begins to rebuild the pool.
For instance, when one of the disk drives fails in a RAID 1 pool, the pool is
not
automatically rebuilt. The failed disk drive must be removed and replaced before
the pool can be rebuilt.
If the controller fails to rebuild the pool, check that the cables, disk drives, and
controllers are properly installed and connected.
Failure in Multiple Pools Simultaneously
If there’s a disk drive failure in more than one pool at the same time (one failure per
pool), and the pools have hot spares protecting them, the controller rebuilds the
pools with these limitations:
• A hot spare must be of equal or greater size than the failed disk drive it’s
replacing.
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