VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Administering Volumes

Adding a DCO and DCO Volume

Chapter 8266

placed on disks which are used to hold the plexes of other volumes, this

may cause problems when you subsequently attempt to move volumes

into other disk groups.

You can use storage attributes to specify explicitly which disks to use for

the DCO plexes. If possible, specify the same disks as those on which the

volume is conﬁgured. For example, to add a DCO object and DCO volume

with plexes on disk5 and disk6, and a plex size of 264 blocks to the

volume, myvol, use the following command:

# vxassist -g mydg addlog myvol logtype=dco dcolen=264 \

disk5 disk6

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 for volume vol1 from disk3 and disk4 to disk7

and disk8:

# vxassist -g mydg move vol1_dcl !disk4 disk7 disk8

For more information, see “Considerations for Placing DCO Plexes” on

page 157.