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

Warning: This command destroys all data on the disks.
When a disk group is destroyed, the disks that are released can be re-used in other
disk groups.
Recovering a destroyed disk group
If a disk group has been accidentally destroyed, you can recover it, provided that
the disks that were in the disk group have not been modified or reused elsewhere.
To recover a destroyed disk group
1
Enter the following command to find out the disk group ID (dgid) of one of
the disks that was in the disk group:
# vxdisk -s list disk_access_name
The disk must be specified by its disk access name, such as c0t12d0. Examine
the output from the command for a line similar to the following that specifies
the disk group ID.
dgid: 963504895.1075.bass
2
Use the disk group ID to import the disk group:
# vxdg import dgid
Upgrading a disk group
Prior to the release of Veritas Volume Manager 3.0, the disk group version was
automatically upgraded (if needed) when the disk group was imported.
Note: On some platforms, the first release of Veritas Volume Manager was 3.0 or
3.2.
From release 3.0 of Veritas Volume Manager, the two operations of importing a
disk group and upgrading its version are separate. You can import a disk group
from a previous version and use it without upgrading it.
When you want to use new features, the disk group can be upgraded. The upgrade
is an explicit operation. Once the upgrade occurs, the disk group becomes
incompatible with earlier releases of VxVM that do not support the new version.
241Creating and administering disk groups
Upgrading a disk group