VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Understanding VERITAS Volume Manager
Volume Snapshots
Chapter 152
The command, vxassist snapback, can be used to return snapshot plexes
to the original volume from which they were snapped, and to
resynchronize the data in the snapshot mirrors from the data in the
original volume. This enables you to refresh the data in a snapshot after
each time that you use it to make a backup. As described in “FastResync”
on page 53, you can use the FastResync feature of VxVM to minimize the
time needed to resynchronize the data in the snapshot mirror. If
FastResync is not enabled, a full resynchronization of the data is
required.
Alternatively, you can use the vxassist snapclear command to break the
association between the original volume and the snapshot volume. The
snapshot volume then has an existence that is independent of the
original volume. This is useful for applications that do not require the
snapshot to be resynchronized with the original volume.
For more information about taking snapshots of a volume, see “Backing
Up Volumes Online Using Snapshots” on page 294, and the vxassist(1M)
manual page.