Veritas Volume Manager 4.1 Troubleshooting Guide (HP-UX 11i v3, February 2007)

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

Errors in some configuration copies

Format error in configuration copy

Invalid block number

Invalid magic number