A disk drive should be assigned as a hot-spare only if it meets the following criteria:
- The hot-spare must have a capacity that is equal to or greater than the capacity of the largest drive on the storage array. If a hot-spare is smaller than a failed physical disk drive, the hot-spare cannot be used to rebuild the data from the failed physical disk drive.
- The hot-spare drive must be the same type of physical disk as the physical disk drive that failed. For example, a SATA hot-spare cannot replace a Fibre Channel physical disk drive.
- The disk drive's role must be unassigned, its state must be enabled, and it must have an optimal status.
Information about individual disk drives is available on the Disk Summary page.