Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

300 Administering volume snapshots
Full-sized instant snapshots
to move the snapshot volume into a separate disk group for off-host processing, or you
want to use the
vxsnap dis or vxsnap split commands to turn the snapshot volume
into an independent volume.
The vxsnap refresh command allows you to update the data in a snapshot each time
that you make a backup.
The command, vxsnap reattach, can be used to attach snapshot plexes to the original
volume, and to resynchronize the data in these plexes from the original volume.
Alternatively, you can use the
vxsnap restore command to restore the contents of the
original volume from a snapshot that you took at an earlier point in time. You can also
choose whether or not to keep the snapshot volume after restoration of the original volume
is complete. See “Restoring the original volume from a snapshot” on page 308 for more
information.
By default, the FastResync feature of VxVM is used to minimize the time needed to
resynchronize the data in the snapshot mirror. If FastResync is not enabled, a full
resynchronization of the data is required. For details, see “FastResync” on page 66.
See “Creating and managing full-sized instant snapshots” on page 317 for details of the
procedures for creating and using this type of snapshot.
For information about how to prepare an empty volume for use by full-sized instant
snapshots, see “Creating a volume for use as a full-sized instant or linked break-off
snapshot” on page 314.