/DRIVER_NAME=filespec

    Specifies the name of the device driver that you are loading.
    If you do not specify this qualifier, SYSMAN obtains the default
    in the same way that the SYSGEN default name is determined. For
    example, if you want to load the VSI-supplied SYS$ELDRIVER.EXE,
    the prefix SYS$ must be present. Without the SYS$, SYSMAN looks
    for ELDRIVER.EXE in SYS$LOADABLE_IMAGES. This implementation
    separates the user device driver namespace from the VSI-supplied
    device driver namespace.