In releases prior to Volume Manager 4.0, the default disk group was rootdg (the root disk group). For Volume Manager to function, the rootdg disk group had to exist and it had to contain at least one disk.

This requirement no longer exists; however, you may find it convenient to create a system-wide default disk group. The main benefit of creating a default disk group is that VxVM commands default to the default disk group. You do not need to use the -g option.

You can set the name of the default disk group after installation by running the following command on a system:

# vxdctl defaultdg diskgroup

See the Veritas Storage Foundation Administrator's Guide.