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

Chapter
5
Backing up and restoring
disk group configurations
Disk group configuration backup and restoration allows you to backup and
restore all configuration data for Veritas Volume Manager (VxVM) disk groups,
and for VxVM objects such as volumes that are configured within the disk
groups. Using this feature, you can recover from corruption of a disk group’s
configuration that is stored as metadata in the private region of a VM disk. After
the disk group configuration has been restored, and the volume enabled, the
user data in the public region is available again without the need to restore this
from backup media.
Caution: The backup and restore utilities act only on VxVM configuration data.
They do not back up or restore any user or application data that is contained
within volumes or other VxVM objects. If you use
vxdiskunsetup and
vxdisksetup on a disk, and specify attributes that differ from those in the
configuration backup, this may corrupt the public region and any user data
therein.
The
vxconfigbackupd daemon monitors changes to the VxVM configuration
and automatically records any configuration changes that occur. Two utilities,
vxconfigbackup and vxconfigrestore, are provided for backing up and
restoring a VxVM configuration for a disk group.
When importing a disk group, any of the following errors indicate that the disk
group configuration and/or disk private region headers have become corrupted:
VxVM vxconfigd ERROR V-5-1-569 Disk group group,Disk disk:Cannot
auto-import group: reason
The reason for the error is usually one of the following:
Configuration records are inconsistent
Disk group has no valid configuration copies
Duplicate record in configuration