Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

and expected serial IDs for any disks in the disk group that are not imported at
this time remain unaltered.
Reorganizing the contents of disk groups
There are several circumstances under which you might want to reorganize the
contents of your existing disk groups:
■ To group volumes or disks differently as the needs of your organization change.
For example, you might want to split disk groups to match the boundaries of
separate departments, or to join disk groups when departments are merged.
■ To isolate volumes or disks from a disk group, and process them independently
on the same host or on a different host. This allows you to implement off-host
processing solutions for the purposes of backup or decision support.
See “About off-host processing solutions” on page 393.
■ To reduce the size of a disk group’s configuration database in the event that
its private region is nearly full. This is a much simpler solution than the
alternative of trying to grow the private region.
■ To perform online maintenance and upgrading of fault-tolerant systems that
can be split into separate hosts for this purpose, and then rejoined.
Use the vxdg command to reorganize your disk groups.
The vxdg command provides the following operations for reorganizing disk groups:
■ The move operation moves a self-contained set of VxVM objects between
imported disk groups. This operation fails if it would remove all the disks from
the source disk group. Volume states are preserved across the move.
Figure 6-4 shows the move operation.
Creating and administering disk groups
Reorganizing the contents of disk groups
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