How to move a volume(full of data) from one diskgroup to onother diskgroup
--------------------------------------------------------------------------
Let's say you want to move one or more volumes from one diskgroup to
another.  Please backup all data before doing this in case you make a
mistake along the way.  This is a VERY TRICKY way to do this, but if
done correctly, it WILL work.

   WARNING: Since you can really only move disk drives from diskgroup
   to diskgroup, you must make sure prior to doing this procedure that
   the disk only contains data for the volume(s) you want to move.  In
   other words, if a physical disk contains data for two different
   volumes (one you want to move and one which you wish to remain), you
   will have to first move the data which is to remain in this
   diskgroup off this disk.


First, you'll need to save the configuration of the volume(s) you want
to move as it appears in the current diskgroup.  For example, to save
the volume configuration for the volumes named "vol02" and "vol13" in
the diskgroup named "rootdg", run:

        vxprint -g rootdg -hmvps vol02 vol13 > /var/tmp/filename

Now remove the volume(s) recursively that you want to move to the new
diskgroup.  Select the volume(s) and use the menu entry
"BasicOps->VolumeOperations->RemoveVolumesRecursively" to do this.

Run the command

        vxdisk list

and save the output.

Then, remove the now empty disks from the current diskgroup (select the
disk(s) and use the "AdvancedOps->DiskGroup->RemoveDisks" menu entry).
Then create a new diskgroup with these disks.

Here's the tricky part:  YOU NEED TO MAKE SURE THAT THE NAMES OF THE
DISKS ARE THE SAME AS THEY WERE IN THE OLD DISKGROUP.  For example, if
'c1t3d4s2' used to be 'disk03', you need to make sure that that
'c1t3d4s2' is still called 'disk03' in the new diskgroup.  This is
where you can use the output of the 'vxdisk list' command.

To recreate the volume(s) in the new diskgroup (in this example, named
"newdg"), run the command

        vxmake -g newdg -d /var/tmp/filename

After the new volumes are made in the new diskgroup, you'll need to
start all the volumes using 'vxvol start' or by using the VxVA GUI.

If it all works, great!  If not, recreate the volumes manually and
then restore all the data from backup tape.