Veritas Volume Manager 5.0 Troubleshooting Guide, HP-UX 11i v3, First Edition, May 2008

11Recovery from hardware failure

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:

1 Place the desired plex in the CLEAN state using the following command:

# vxmend [-g

diskgroup

] fix clean

plex

For example, to place the plex vol01-02 in the CLEAN state:

# vxmend -g mydg fix clean vol01-02

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 [-g

diskgroup

] fix stale plex

3 To enable the CLEAN plex and to recover the STALE plexes from it, use the

following command:

# vxvol [-g

diskgroup

] start volume

For example, to recover volume vol01:

# vxvol -g mydg start vol01

For more information about the vxmend and vxvol command, see the

vxmend(1M) and vxvol(1M) manual pages.

Note: Following severe hardware failure of several disks or other related

subsystems underlying all the mirrored plexes of a volume, it may be impossible

to recover the volume using

vxmend. In this case, remove the volume, recreate it

on hardware that is functioning correctly, and restore the contents of the

volume from a backup or from a snapshot image.