If you want to retain the existing plexes in a snapshot volume after a snapback operation, you can create additional snapshot plexes that are to be used for the snapback.
To add plexes to a snapshot volume
vxprint
commands to discover the names of the snapshot volume's data change object (DCO) and DCO volume:
vxassist
mirror
command to create mirrors of the existing snapshot volume and its DCO volume:
# vxassist -g
diskgroup mirror
snapshot
# vxassist -g
diskgroup mirror $DCOVOL
Note The new plex in the DCO volume is required for use with the new data plex in the snapshot.
vxprint
command to find out the name of the additional snapshot plex:
vxprint
command to find out the record ID of the additional DCO plex:
vxedit
command to set the dco_plex_rid
field of the new data plex to the name of the new DCO plex:
# vxedit -g
diskgroup set dco_plex_rid=
dco_plex_rid
new_plex
The new data plex is now ready to be used to perform a snapback operation.