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

Removing a version 0 DCO and DCO volume
To dissociate a version 0 DCO object, DCO volume and any snap objects from a
volume, use the following command:
# vxassist [-g diskgroup] remove log volume logtype=dco
This completely removes the DCO object, DCO volume and any snap objects. It
also has the effect of disabling FastResync for the volume.
Alternatively, you can use the vxdco command to the same effect:
# vxdco [-g diskgroup] [-o rm] dis dco_obj
The default name of the DCO object, dco_obj, for a volume is usually formed by
appending the string _dco to the name of the parent volume. To find out the name
of the associated DCO object, use the vxprint command on the volume.
To dissociate, but not remove, the DCO object, DCO volume and any snap objects
from the volume, myvol, in the disk group, mydg, use the following command:
# vxdco -g mydg dis myvol_dco
This form of the command dissociates the DCO object from the volume but does
not destroy it or the DCO volume. If the -o rm option is specified, the DCO object,
DCO volume and its plexes, and any snap objects are also removed.
Warning: Dissociating a DCO and DCO volume disables Persistent FastResync on
the volume. A full resynchronization of any remaining snapshots is required when
they are snapped back.
See the vxassist(1M) manual page.
See the vxdco(1M) manual pages.
Reattaching a version 0 DCO and DCO volume
If a version 0 DCO object and DCO volume are not removed by specifying the -o
rm option to vxdco, they can be reattached to the parent volume using the following
command:
# vxdco [-g diskgroup] att volume dco_obj
For example, to reattach the DCO object, myvol_dco, to the volume, myvol, use
the following command:
# vxdco -g mydg att myvol myvol_dco
409Administering volume snapshots
Adding a version 0 DCO and DCO volume