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Chapter 16: Solving Problems ● 149
Failed Disk Drive Not Protected by a Hot Spare
When a logical drive is not protected by a hot spare, if a disk drive in
that logical drive fails, remove and replace the failed disk drive. The
controller detects the new disk drive and begins to rebuild the logical
drive.
If the controller fails to rebuild the logical drive, check that the cables,
disk drives, and controllers are properly installed and connected. Then, if
necessary, follow the instructions in
Rebuilding Logical Drives
on page 151
.
Failure in Multiple Logical Drives Simultaneously
If there’s a disk drive failure in more than one logical drive at the same
time (one failure per logical drive), and the logical drives have hot
spares protecting them, the controller rebuilds the logical drives with
these limitations:
● A hot spare must be of equal or greater size than the failed disk drive
it’s replacing.
● Failed disk drives are replaced with hot spares in the order in which
they failed. (The logical drive that includes the disk drive that failed
first is rebuilt first, assuming an appropriate hot spare is available—
see bullet above.)
If there are more disk drive failures than hot spares, see Failed Disk
Drive Not Protected by a Hot Spare on page 149.
If copyback is enabled, data is moved back to its original location once
the controller detects that the failed drive has been replaced. See
Enabling Copyback on page 98 for more information.
Disk Drive Failure in a RAID 0 Logical Drive
Because RAID 0 volumes do not include redundancy, if a disk drive fails
in a RAID 0 logical drive, the data can’t be recovered.
Correct the cause of the failure or replace the failed disk drives. Then,
restore your data (if available).