we have four disks for a diskset, three of them form a RAID, one disk is
configured as hot spare. One of the three disks failed and the hot spare
sucessfully replaced the failed disk. I repaired the failed disk an
brought it back from "Need Maintenance" to state "Okay" by enabling it.
The disk got resynced, but the hot spare is still "In use". How can i
bring the hot spare disk back to "Available"?