Overview
"hot spare" can automate mirroring recovery using spare disks in the event of mirrored disk failure.
Figure 1.9 Hot Spare
Spare Disk Automatic Connection
If an I/O error occurs in a disk connected to a mirror group, a spare disk is automatically connected to the mirror group. Subsequently, synchronization copying for the spare disk takes place to recover normal mirroring.
Spare Disk Automatic Disconnection
After the disk where an I/O error occurred is recovered, the spare disk is automatically disconnected from the mirror group. For example, if disk failure causes an I/O error and a spare disk is automatically connected, the spare disk will automatically be disconnected after the failed disk is swapped with another disk and synchronization copying to the new disk is complete.
Note
The hot spare function cannot be used for system disks.
Note
Points of Concern for Hot Spare
See "3.8 Hot Spare."
