You may sometimes need to create a disk group that can be imported on a system running an older version of Veritas Volume Manager. You must specify the disk group version when you create the disk group, since you cannot downgrade a disk group version.

For example, the default disk group version for a disk group created on a system running Veritas Volume Manager 6.0 is 170. Such a disk group cannot be imported on a system running Veritas Volume Manager 4.1, as that release only supports up to version 120. Therefore, to create a disk group on a system running Veritas Volume Manager 6.0 that can be imported by a system running Veritas Volume Manager 4.1, the disk group must be created with a version of 120 or less.

To create a disk group with a previous version, specify the -T version option to the vxdg init command.