Specifies the unique device identifier (UDID), which is
                used as the unit number in the device name for an external
                disk. The device name is in the form $3$dgaxyz, where xyz
                is the UDID for external disks.

                Format:
                        /IDENT=udid

                The value of the identifier can be between 1 and 9999.

                See the /REMOVE qualifier to remove a UDID.