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

# vxsnap [-g snapdiskgroup] reattach snapvolume|snapvolume_set \
source=volume|volume_set [sourcedg=diskgroup]
The sourcedg attribute must be used to specify the data volume’s disk group if
this is different from the snapshot volume’s disk group, snapdiskgroup.
Warning: The snapshot that is being reattached must not be open to any
application. For example, any file system configured on the snapshot volume must
first be unmounted.
It is possible to reattach a volume to an unrelated volume provided that their sizes
and region sizes are compatible.
For example the following command reattaches the snapshot volume, prepsnap,
in the disk group, snapdg, to the volume, myvol, in the disk group, mydg:
# vxsnap -g snapdg reattach prepsnap source=myvol sourcedg=mydg
After resynchronization of the snapshot volume is complete, the link is placed in
the ACTIVE state. You can use the vxsnap snapwait command (but not vxsnap
syncwait) to wait for the resynchronization of the reattached volume to complete,
as shown here:
# vxsnap -g snapdg snapwait myvol mirvol=prepsnap
Restoring a volume from an instant snapshot
It may sometimes be desirable to reinstate the contents of a volume from a backup
or modified replica in a snapshot volume. The following command may be used
to restore one or more volumes from the specified snapshots:
# vxsnap [-g diskgroup] restore volume|volume_set \
source=snapvolume|snapvolume_set \
[[volume2|volume_set2 \
source=snapvolume2|snapvolume_set2]...]\
[destroy=yes|no] [syncing=yes|no] [nmirror=number]
For a full-sized instant snapshot, some or all of its plexes may be reattached to
the parent volume or to a specified source volume in the snapshot hierarchy above
the snapshot volume. If destroy=yes is specified, all the plexes of the full-sized
instant snapshot are reattached and the snapshot volume is removed.
For a space-optimized instant snapshot, the cached data is used to recreate the
contents of the specified volume. The space-optimized instant snapshot remains
unchanged by the restore operation.
387Administering volume snapshots
Creating instant snapshots