/IDENT=udid

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

    The UDID can be a number between 1 and 9999.

    See the /REMOVE qualifier to remove a UDID.