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

Once you have added one or more snapshot mirrors to a volume, you can use the
vxsnap make command with either the nmirror attribute or the plex attribute to
create the snapshot volumes.
Removing a snapshot mirror
To remove a single snapshot mirror from a volume, use this command:
# vxsnap [-g diskgroup] rmmir volume|volume_set
For example, the following command removes a snapshot mirror from the volume,
vol1:
# vxsnap -g mydg rmmir vol1
This command is similar in usage to the vxassist snapabort command.
If a volume set name is specified instead of a volume, a mirror is removed from
each volume in the volume set.
Removing a linked break-off snapshot volume
To remove a linked break-off snapshot volume from a volume, use this command:
# vxsnap [-g diskgroup] rmmir volume|volume_set mirvol=snapvol \
[mirdg=snapdiskgroup]
The mirvol and optional mirdg attributes specify the snapshot volume, snapvol,
and its disk group, snapdiskgroup. For example, the following command removes
a linked snapshot volume, prepsnap, from the volume, vol1:
# vxsnap -g mydg rmmir vol1 mirvol=prepsnap mirdg=mysnapdg
Adding a snapshot to a cascaded snapshot hierarchy
To create a snapshot and push it onto a snapshot hierarchy between the original
volume and an existing snapshot volume, specify the name of the existing snapshot
volume as the value of the infrontof attribute to the vxsnap make command.
The following example shows how to place the space-optimized snapshot,
thurs_bu, of the volume, dbvol, in front of the earlier snapshot, wed_bu:
# vxsnap -g dbdg make source=dbvol/newvol=thurs_bu/\
infrontof=wed_bu/cache=dbdgcache
Similarly, the next snapshot that is taken, fri_bu, is placed in front of thurs_bu:
Administering volume snapshots
Creating instant snapshots
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