Veritas Volume Manager 5.0 Troubleshooting Guide Guide (September 2006)

49Backing up and restoring disk group configurations
Restoring a disk group configuration
Caution: Take care that you do not overwrite any files on the target system that are used by
a disk group on that system.
To back up a disk group manually, use this command:
# /etc/vx/bin/vxconfigbackup diskgroup
To back up all disk groups, use this version of the command:
# /etc/vx/bin/vxconfigbackup
For more information, see the vxconfigbackup(1M) manual page.
Restoring a disk group configuration
You can use the vxconfigrestore utility to restore or recreate a disk group from its
configuration backup. The restoration process has two stages: precommit and commit. In
the precommit stage, you can examine the configuration of the disk group that would be
restored from the backup. The actual disk group configuration is not permanently restored
until you choose to commit the changes.
Note: None of the disks or VxVM objects in the disk group may be open or in use by any
application while the restoration is being performed.
You can choose whether or not any corrupted disk headers are to be reinstalled at this
stage. If any of the disks’ private region headers are invalid, restoration may not be
possible without reinstalling the headers for the affected disks.
The following command performs a precommit analysis of the state of the disk group
configuration, and reinstalls the disk headers where these have become corrupted:
# /etc/vx/bin/vxconfigrestore -p [-l directory] \
{diskgroup | dgid}
The disk group can be specified either by name or by ID.
The
-l option allows you to specify a directory for the location of the backup
configuration files other than the default location, /etc/vx/cbr/bk. See “Backing up
a disk group configuration” on page 48 for details.
To specify that the disk headers are not to be reinstalled, use this form of the command:
# /etc/vx/bin/vxconfigrestore -n [-l directory] \
{diskgroup | dgid}
At the precommit stage, you can use the vxprint command to examine the configuration
that the restored disk group will have. You can choose to proceed to commit the changes
and restore the disk group configuration. Alternatively, you can cancel the restoration
before any permanent changes have been made.
To abandon restoration at the precommit stage, use this command:
# /etc/vx/bin/vxconfigrestore -d [-l directory] \
{diskgroup | dgid}