NAME
    Invalid -- Return with error IOERR_NOCMD.

FUNCTION
    This command causes device driver to reply with an error IOERR_NOCMD
    as defined in <exec/errors.h> indicating the command is not supported.

IO REQUEST
    ios2_Command    - CMD_INVALID.

RESULTS
    ios2_Error      - IOERR_NOCMD.

NOTES

SEE ALSO

BUGS
    Not known to be useful.