VERITAS Volume Manager 4.1 Troubleshooting Guide

Recovery from Hardware Failure
Recovering an Unstartable Mirrored Volume
Chapter 1 15
“Recovering an Unstartable Mirrored Volume” on page 15, and subsequent sections describe
the actions that you can take if a system crash or I/O error leaves no plexes of a mirrored
volume in a CLEAN or ACTIVE state.
For information on the recovery of RAID-5 volumes, see “Failures on RAID-5 Volumes” on
page 19 and subsequent sections.
Recovering an Unstartable Mirrored Volume
A system crash or an I/O error can corrupt one or more plexes of a mirrored volume and leave
no plex CLEAN or ACTIVE. You can mark one of the plexes CLEAN and instruct the system to use
that plex as the source for reviving the others as follows:
Step 1. Place the desired plex in the CLEAN state using the following command:
# vxmend fix clean plex
For example, to place the plex vol01-02 in the CLEAN state:
# vxmend fix clean vol01-02
Step 2. To recover the other plexes in a volume from the CLEAN plex, the volume must be
disabled, and the other plexes must be STALE. If necessary, make any other CLEAN
or ACTIVE plexes STALE by running the following command on each of these plexes
in turn:
# vxmend fix stale plex
Step 3. To enable the CLEAN plex and to recover the STALE plexes from it, use the following
command:
# vxvol start volume
For example, to recover volume vol01:
# vxvol start vol01
For more information about the vxmend and vxvol command, see the vxmend (1M) and vxvol
(1M) manual pages.