You can create a volume directly (without having to modify and import an XML file).
Use the create option of the srv4 volume command.
Example
srv4 volume test -create -url d:\mydata
creates a volume called 'test' with 'd:\mydata' as its root. The command fails if there is already a volume called 'test'.
You can also set the credentials for the new volume. See Set credentials for a volume.
You can also specify that a volume is read-only (or not). See Read-only volumes.
Notes
•For the description of the volume command, see volume.
•For additional information, see the discussion on Tera forum in http://forum.teradp.com/topic.asp?TOPIC_ID=737.