You should use the -g option to specify a disk group to VxVM commands that accept this option. If you do not specify the disk group, VxVM applies rules in the following order until it determines a disk group name:
Use the default disk group name that is specified by the environment variable VXVM_DEFAULTDG. This variable can also be set to one of the reserved system-wide disk group names: bootdg, defaultdg, or nodg. If the variable is undefined, the following rule is applied.
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.
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.
More Information
Displaying and specifying the system-wide default disk group