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

Volume Tasks
Using the Volume Snapshot Feature
Chapter 4 137
• If you remove the snapshot mirror, you cannot create a snapshot
volume until you repeat the snapstart phase of the procedure.
Merging a Snapshot Volume (Volume Snapback)
The volume Snap Back procedure merges a snapshot copy of a volume
with the original volume. The snapshot plex is detached from the
snapshot volume and attached to the original volume. The snapshot
volume is removed. This task resynchronizes the data in the volume so
that the plexes are consistent. By default, the data in the original plex is
used for the merged volume.
To reattach a snapshot mirror to the original volume, do the following:
Step 1. Right-click the volume whose snapshot you want to reattach.
A context menu is displayed.
Step 2. Select Snap > Snap Back.
Step 3. Specify whether the snapshot volume is resynchronized with the original
volume, or the original volume is synchronized to the snapshot volume
and click OK.
NOTE One situation where you might want to resynchronize to the snapshot
volume rather than the original volume is the case where something has
happened to the original volume so that its data integrity is no longer
sound.
The snapshot mirror is reattached to the original volume and the
snapshot volume is deleted if it is the last plex of the volume. (If the
snapshot volume has other mirrors associated with it, it is not deleted.)
Dissociating a Snapshot Volume (Volume Snap Clear)
The volume Snap Clear procedure permanently breaks the association
between a snapshot and its original volume. The snapshot volume
becomes an independent volume.