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

Chapter 4, Volume Tasks 101
Using the Volume Snapshot Feature
- Snap Start - Creating a Snapshot Copy of a Volume
Attaches the snapshot mirror to the original volume.
- Snap Shot - Creating the New Volume
Detaches the snapshot mirror from the original volume and creates a snapshot
volume that is associated with the snapshot mirror.
- Snap Back - Merging a Snapshot Volume (Volume Snapback)
Reattaches the snapshot mirror to the original volume.
- Snap Clear - Dissociating a Snapshot Volume (Volume Snap Clear)
Permanently removes the snapshot mirror from the original volume and releases
its space.
- Snap Abort - Aborting a Snapshot
Aborts the snapshot operation after issuing the Snap Start command. Snap
Abort permanently removesthe snapshot mirrorfromthe volumeandreleasesits
space.
The five snapshot commands are subcommands of the Snap command on the Volume
context menu.
Using Snapshot
In summary, the snapshot procedure consists of three steps:
1. Attaching a snapshot mirror to a volume, using Snap Start.
2. Detaching the snapshot mirror and creating the snapshot volume that is associated
with the snapshot mirror. The Snap Shot command is used for this step.
3. Either reattaching the snapshot to the volume after you are done using it, or
permanently disconnecting it from the volume. Snap Back reattaches the snapshot
mirror; Snap Clear permanently disconnects the snapshot mirror from the volume,
removing the association between the snapshot volume and the original volume.
Snap Abort aborts the snapshot operation after issuing the Snap Start command.
Creating a Snapshot Copy of a Volume
Snap Start creates a snap mirror or plex, which is attached to and synchronized with a
volume. Once the snap mirror is synchronized, its status, as displayed on the Mirrors tab
of the GUI, changes to Snap Ready.