Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

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.
You can create a snapshot of all volumes that form a logical group; for example,
all the volumes that conform to a database instance.
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 17-9 shows an alternative where the snapshot overwrites the original
volume.
Figure 17-9
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
211Administering volume snapshots
Restoring the original volume from a snapshot