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

Use the disk group that has been assigned to the system-wide default disk
group alias, defaultdg. If this alias is undefined, the following rule is applied.
See Displaying and specifying the system-wide default disk group on page 197.
If the operation can be performed without requiring a disk group name (for
example, an edit operation on disk access records), do so.
If none of these rules succeeds, the requested operation fails.
Warning: In releases of VxVM prior to 4.0, a subset of commands tried to determine
the disk group by searching for the object name that was being operated upon by
a command. This functionality is no longer supported. Scripts that rely on
determining the disk group from an object name may fail.
Displaying the system-wide boot disk group
To display the currently defined system-wide boot disk group, use the following
command:
# vxdg bootdg
See the vxdg(1M) manual page.
Displaying and specifying the system-wide default disk group
To display the currently defined system-wide default disk group, use the following
command:
# vxdg defaultdg
If a default disk group has not been defined, nodg is displayed. You can also use
the following command to display the default disk group:
# vxprint -Gng defaultdg 2>/dev/null
In this case, if there is no default disk group, nothing is displayed.
Use the following command to specify the name of the disk group that is aliased
by defaultdg:
# vxdctl defaultdg diskgroup
If bootdg is specified as the argument to this command, the default disk group is
set to be the same as the currently defined system-wide boot disk group.
If nodg is specified as the argument to the vxdctl defaultdg command, the
default disk group is undefined.
197Creating and administering disk groups
About disk groups