When RAID-5 subdisks are moved and replaced, the new subdisks are marked as STALE
in anticipation of recovery. If the volume is active, the vxsd
command may be used to recover the volume. If the volume is not active, it is recovered when it is next started. The RAID-5 volume is degraded for the duration of the recovery operation.
Any failure in the stripes involved in the move makes the volume unusable. The RAID-5 volume can also become invalid if its parity becomes stale.
To avoid a volume becoming unusable, the vxsd
command does not allow a subdisk move in the following situations:
Only the third case can be overridden by using the -o
force
option.
Subdisks of RAID-5 volumes can also be split and joined by using the vxsd
split
command and the vxsd
join
command. These operations work the same way as those for mirrored volumes.
RAID-5 subdisk moves are performed in the same way as subdisk moves for other volume types, but without the penalty of degraded redundancy.