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

■ Remove the snapshot volume to save space with this command:
# vxedit [-g diskgroup] -rf rm snapshot
Dissociating or removing the snapshot volume loses the advantage of fast
resynchronization if FastResync was enabled. If there are no further snapshot
plexes available, any subsequent snapshots that you take require another
complete copy of the original volume to be made.
Converting a plex into a snapshot plex
Note: A plex cannot be converted into a snapshot plex for layered volumes or for
any volume that has an associated version 20 DCO volume.
It is recommended that the instant snapshot feature is used in preference to
converting a plex into a snapshot plex.
In some circumstances, you may find it more convenient to convert an existing
plex in a volume into a snapshot plex rather than running vxassist snapstart.
For example, you may want to do this if you are short of disk space for creating
the snapshot plex and the volume that you want to snapshot contains more than
two plexes.
The procedure can also be used to speed up the creation of a snapshot volume
when a mirrored volume is created with more than two plexes and init=active
is specified.
It is advisable to retain at least two plexes in a volume to maintain data
redundancy.
To convert an existing plex into a snapshot plex for a volume on which Persistent
FastResync is enabled, use the following command:
# vxplex [-g diskgroup] -o dcoplex=dcologplex convert \
state=SNAPDONE plex
dcologplex is the name of an existing DCO plex that is to be associated with the
new snapshot plex. You can use the vxprint command to find out the name of
the DCO volume.
See “Adding a version 0 DCO and DCO volume” on page 405.
For example, to make a snapshot plex from the plex trivol-03 in the 3-plex
volume trivol, you would use the following command:
Administering volume snapshots
Creating traditional third-mirror break-off snapshots
400