HP Veritas Volume Manager 5.0 -UX 11i v3 manual Renaming a disk group

Creating and administering disk groups

Renaming a disk group

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Renaming a disk group

Only one disk group of a given name can exist per system. It is not possible to import or deport a disk group when the target system already has a disk group of the same name. To avoid this problem, VxVM allows you to rename a disk group during import or deport.

To rename a disk group during import, use the following command:

#vxdg [-t] -n newdg import diskgroup

If the -toption is included, the import is temporary and does not persist across reboots. In this case, the stored name of the disk group remains unchanged on its original host, but the disk group is known by the name specified by newdg to the importing host. If the -toption is not used, the name change is permanent.

For example, this command temporarily renames the disk group, mydg, as mytempdg on import:

#vxdg -t -n mytempdg import mydg

To rename a disk group during deport, use the following command:

#vxdg [-hhostname] -nnewdg deport diskgroup

When renaming on deport, you can specify the -hhostname option to assign a lock to an alternate host. This ensures that the disk group is automatically imported when the alternate host reboots.

For example, this command renames the disk group, mydg, as myexdg, and deports it to the host, jingo:

#vxdg -h jingo -n myexdg deport mydg

Note: You cannot use this method to rename the active boot disk group because it contains volumes that are in use by mounted file systems (such as /). To rename the boot disk group, boot the system from an LVM root disk instead of from the VxVM root disk. You can then use the above methods to rename the boot disk group. See the sections under “Rootability” on page 102 for more information.

To temporarily move the boot disk group, bootdg, from one host to another (for repair work on the root volume, for example) and then move it back

1On the original host, identify the disk group ID of the bootdg disk group to be imported with the following command:

#vxdisk -g bootdg -s list

This command results in output such as the following:

dgname: rootdg