Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

For traditional snapshots, you can create snapshots of all the volumes in a single
disk group by specifying the option -o allvols to the vxassist snapshot
command.
By default, each replica volume is named SNAPnumber-volume, where number is
a unique serial number, and volume is the name of the volume for which a snapshot
is being taken. This default can be overridden by using the option -o
name=pattern.
See the vxassist(1M) manual page.
See the vxsnap(1M) manual page.
It is also possible to take several snapshots of the same volume. A new FastResync
change map is produced for each snapshot taken to minimize the
resynchronization time for each snapshot.
Restoring the original volume from a snapshot
For traditional snapshots, the snapshot plex is resynchronized from the data in
the original volume during a vxassist snapback operation.
Figure 9-9 shows an alternative where the snapshot overwrites the original volume.
Figure 9-9
Resynchronizing an original volume from a snapshot
Refresh on snapback
Original volume
Snapshot mirror
-o resyncfromreplica snapback
Snapshot volume
Specifying the option -o resyncfromreplica to vxassist resynchronizes the
original volume from the data in the snapshot.
Warning: The original volume must not be in use during a snapback operation
that specifies the option -o resyncfromreplica to resynchronize the volume
from a snapshot. Stop any application, such as a database, and unmount any file
systems that are configured to use the volume.
For instant snapshots, the vxsnap restore command may be used to restore the
contents of the original volume from an instant snapshot or from a volume derived
363Administering volume snapshots
Restoring the original volume from a snapshot