
Dell Shared PowerEdge RAID Controller (PERC) 8 For Dell PowerEdge VRTX Systems User’s Guide
Degraded state of virtual disks
A redundant virtual disk is in a degraded state when one or more physical disks have failed or are inaccessible. For example, if a RAID 1 virtual disk consists of two physical disks and one of them fails or becomes inaccessible, the virtual disk becomes degraded.
To recover a virtual disk from a degraded state, you must replace the failed physical disk and rebuild it. After the rebuilding process is complete, the virtual disk state changes from degraded to optimal.
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