Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Cascaded Snapshots
272 VERITAS Volume Manager Administrator’s Guide
If you have configured snapshots in this way, you may wish to make one or more of the
snapshots into independent volumes. There are two vxsnap commands that you can use
to do this:
◆ vxsnap dis dissociates a snapshot volume and turns it into an independent volume.
The volume to be dissociated must have been fully synchronized from its parent. If a
snapshot volume has a child snapshot volume, the child must also have been fully
synchronized. If the command succeeds, the child snapshot becomes a snapshot of the
original volume. “Dissociating a Snapshot Volume” on page 272 illustrates the effect
of applying this command to snapshots with and without dependent snapshots.
Dissociating a Snapshot Volume
vxsnap dis S1
Original
volume
V
Snapshot
volume of V:
S1
Snapshot
volume of S1:
S2
Original
volume
V
Snapshot
volume of V:
S2
Volume
S1
vxsnap dis S2
Original
volume
V
Snapshot
volume of V:
S1
Snapshot
volume of S1:
S2
Original
volume
V
Snapshot
volume of V:
S1
Volume
S2
S2 is adopted by VS1 is independent
S2 is independent
vxsnap dis is applied to snapshot S2, which has no snapshots of its own
vxsnap dis is applied to snapshot S1, which has one snapshot S2
S1 remains owned by V