Dell Shared PowerEdge RAID Controller (PERC) 8 For Dell PowerEdge VRTX Systems User’s Guide

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Auto replacement of a virtual disk member and revertible hot spares

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.
  • 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.
  • 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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