Veritas Volume Manager 5.0.1 Troubleshooting Guide, HP-UX 11i v3, First Edition, November 2009

To reattach a failed RAID-5 log plex
◆
Type the following command:
# vxplex -g diskgroup att r5vol r5vol-plex
Recovering a stale subdisk in a RAID-5 volume
Stale subdisk recovery is usually done at volume start time. However, the process
doing the recovery can crash, or the volume may be started with an option such
as -o delayrecover that prevents subdisk recovery. In addition, the disk on which
the subdisk resides can be replaced without recovery operations being performed.
In such cases, you can perform subdisk recovery by using the vxvol recover
command.
To recover a stale subdisk in the RAID-5 volume
◆
Type the following command:
# vxvol -g diskgroup recover r5vol subdisk
A RAID-5 volume that has multiple stale subdisks can be recovered in one
operation. To recover multiple stale subdisks, use the vxvol recover
command on the volume:
# vxvol -g diskgroup recover r5vol
Recovery after moving RAID-5 subdisks
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:
■ A stale subdisk occupies any of the same stripes as the subdisk being moved.
Recovering from hardware failure
Failures on RAID-5 volumes
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