HP Veritas Volume Manager 5.0 -UX 11i v3 manual Removing a version 0 DCO and DCO volume

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Administering volume snapshots

Adding a version 0 DCO and DCO volume

the volume named vol1 (the TUTIL0 and PUTIL0 columns are omitted for clarity):

TY	NAME	ASSOC	KSTATE	LENGTH	PLOFFS	STATE ...
v	vol1	fsgen	ENABLED	1024	-	ACTIVE
pl	vol1-01	vol1	ENABLED	1024	-	ACTIVE
sd	disk01-01	vol1-01	ENABLED	1024	0	-
pl	vol1-02	vol1	ENABLED	1024	-	ACTIVE
sd	disk02-01	vol1-02	ENABLED	1024	0	-
dc	vol1_dco	vol1	-	-	-	-
v	vol1_dcl	gen	ENABLED	132	-	ACTIVE
pl	vol1_dcl-01	vol1_dcl	ENABLED	132	-	ACTIVE
sd	disk03-01	vol1_dcl-01	ENABLED	132	0	-
pl	vol1_dcl-02	vol1_dcl	ENABLED	132	-	ACTIVE
sd	disk04-01	vol1_dcl-02	ENABLED	132	0	-

In this output, the DCO object is shown as vol1_dco, and the DCO volume as vol1_dcl with 2 plexes, vol1_dcl-01and vol1_dcl-02.

If required, you can use the vxassist move command to relocate DCO plexes to different disks. For example, the following command moves the plexes of the DCO volume, vol1_dcl, for volume vol1 from disk03 and disk04 to disk07 and disk08:

#vxassist -g mydg move vol1_dcl !disk03 !disk04 disk07 disk08

For more information, see “Moving DCO volumes between disk groups” on page 200, and the vxassist(1M) manual page.

Removing a version 0 DCO and DCO volume

Note: The operations in this section relate to version 0 DCO volumes. They are not supported for the version 20 DCO volume layout that was introduced in VxVM 4.0.

To dissociate a 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