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

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 mydg05 and
mydg06, and a plex size of 264 blocks to the volume, myvol, in the disk group, mydg,
use the following command:
# vxassist -g mydg addlog myvol logtype=dco dcolen=264 mydg05 mydg06
To view the details of the DCO object and DCO volume that are associated with a
volume, use the vxprint command. The following is partial vxprint output for
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-01 and 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.
Note: The ! character is a special character in some shells. The following example
shows how to escape it in a bash shell.
# vxassist -g mydg move vol1_dcl \!disk03 \!disk04 disk07 disk08
See “Moving DCO volumes between disk groups” on page 232.
See the vxassist(1M) manual page.
Administering volume snapshots
Adding a version 0 DCO and DCO volume
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