By designating spare disks and making free space on disks available for use by hot relocation, you can control how disk space is used for relocating subdisks in the event of a disk failure. If the combined free space and space on spare disks is not sufficient or does not meet the redundancy constraints, the subdisks are not relocated.
Find out which disks are spares or are excluded from hot-relocation.
You can prepare for hot-relocation by designating one or more disks per disk group as hot-relocation spares.
If required, you can remove a disk from use as a hot-relocation spare
If no spares are available at the time of a failure or if there is not enough space on the spares, free space on disks in the same disk group as where the failure occurred is automatically used, unless it has been excluded from hot-relocation use.
Depending on the locations of the relocated subdisks, you can choose to move them elsewhere after hot-relocation occurs.
After a successful relocation, remove and replace the failed disk.