VERITAS Volume Manager 3.5 User's Guide - VERITAS Enterprise Administrator (June 2002)

Chapter 4, Volume Tasks 103
Using the Volume Snapshot Feature
The Snapshot Volume dialog box is displayed. You are asked to select the snapshot
mirror to be used to create the snapshot volume.
3. Select the mirror and click OK.
When there is only one snapshot mirror, “Automatic select mirror to add snapshot”
will be highlighted. If there are multiple mirrors and you want to select the mirror to
be used, click to select “Manual select which mirror to add snapshot.” You then can
select the mirror from the list on the screen.
Click OK.
The snapshot mirror is detached from the original volume and a new volume is
created that is associated with the snapshot mirror.
The snapshot mirroris nolongerdisplayed onthe Mirrors tab forthe original volume.
The new snapshot volume is displayedunder the Volumes folder in the treeview. The
program assigns it the next available drive letter. You can now use the snapshot
volume for backup or other purposes.
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.
Notes:
- FastResync is not supported for RAID-5 volumes
- The Volume Snapshot Interactive task requires a volume name and a snapshot
name.
- The snapshot volume is an exact copy of the original volume at the time the snapshot
phase of the procedure starts.
- After you create the snapshot copyof thevolume, remember to back it upto tapeor some
other media. Remove the snapshot volume when it is no longer needed.
- The snapstart phase of this task may take a long time, depending on the size of the
volume.
- If you remove the snapshot mirror, you cannot create a snapshot volume until you repeat
the snapstart phase of the procedure.