The automatic Replace Member functionality allows a previously commissioned
hot spare to be reverted to a usable hot spare. When a disk failure
occurs within a virtual disk, an assigned hot spare (dedicated or
global) is commissioned and begins rebuilding until the virtual disk
is optimal. After the failed physical disk is replaced (in the same
slot) and the rebuild is complete, the Shared PERC 8 card automatically
starts to copy data from the commissioned hot spare to the newly inserted disk.
After the data is copied, the new disk is a part of the virtual disk
and the hot spare is reverted to a ready hot spare. This allows hot
spares to remain in specific enclosure slots. While the Shared PERC
8 card is reverting the hot spare, the virtual disk remains optimal.
The physical disk with the SMART error is marked as
Failed only after the successful completion of the Replace Member. This
avoids putting the array in degraded status. If an automatic Replace
Member occurs using a source disk that was originally a hot spare
(that was used in a rebuild), and a new disk added for the Replace
Member operation as the target disk, the hot spare reverts to the
hot spare state after a successful Replace Member operation.
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NOTE: The
Shared PERC 8 card automatically reverts a hot spare only if the failed
disk is replaced with a new disk in the same slot.
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NOTE: A Replace Member operation
typically has a temporary impact on disk performance. After the operation
completes, the disk performance returns to normal.
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NOTE: To enable the automatic
Replace Member, use the Dell OpenManage storage management application.
For more information about automatic Replace Member, see the topic
Dell OpenManage Storage Management. For information on manual Replace
Member, see the topic Replacing An Online Physical Disk.