IBM SSA 32H3816 - Manual (Page 69)

C.2.4 Hot Spares
A hot-spare disk drive is a disk drive that is defined for automatic use if a disk drive within an array fails. The hot-spare must have a
storage capacity greater than or equal to that of the smallest member of an array. You can define as many hot spares as you want.
Any RAID-1 and RAID-5 array on an adapter can use the hot-spare disk drives on that adapter.
If a disk drive within an array fails, at the next write operation to the array, the adapter automatically uses a hot spare instead of the
failed disk drive, and rebuilds the data that was on the failed disk on to the hot spare.
SSA RAID Adapter Installation and User's Guide.
Hot Spares
_ Copyright IBM Corp. 1996
C.2.4 - 1