Veritas FlashSnap Point-In-Time Copy Solutions 5.0.1 Administrators Guide, HP-UX 11i v3, First Edition, November 2009

The snapshot volume is initially disabled following the join. Use the following

command on the primary host to recover and restart the snapshot volume:

# vxrecover -g volumedg -m snapvol

When the backup is complete, use the following command to unmount the

snapshot volume, and make it ready for its contents to be refreshed from the

primary volume:

# umount mount_point

When synchronization is complete, the snapshot is ready to be re-used for

backup.

Warning: Before attempting to unmount the snapshot, shut down all

applications that access a file system in the snapshot volume, and also

unmount any such file system.

Repeat steps 2 through 14 each time that you need to back up the volume.

In some instances, such as recovering the contents of a corrupted volume, it may

be useful to resynchronize a volume from its snapshot volume (which is used as

a hot standby):

# vxsnap -g diskgroup restore volume source=snapvol

destroy=yes|no

The destroy attribute specifies whether the plexes of the snapshot volume are

to be reattached to the original volume. For example, to resynchronize the volume

cfs_vol from its snapshot volume scfs_vol:

# vxsnap -g exampledg restore cfs_vol source=scfs_vol destroy=no

Note: You must unmount the file system that is configured on the original volume

before attempting to resynchronize its contents from a snapshot.

Reattaching snapshot plexes

Some or all plexes of an instant snapshot may be reattached to the specified

original volume, or to a source volume in the snapshot hierarchy above the

snapshot volume.

Note: This operation is not supported for space-optimized instant snapshots.

59Off-host cluster file system backup

Using off-host processing to back up cluster file systems