VMS Help Sys Parameters, NOAUTOCONFIG  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    NOAUTOCONFIG controls whether all devices are automatically
    configured when the system boots. The default value of 0 sets the
    system to automatically configure all devices. Set NOAUTOCONFIG
    to 1 (no automatic configuration) only for debugging purposes.

    This special parameter is used by Compaq and is subject to
    change. Do not change this parameter unless Compaq recommends
    that you do so.

    NOAUTOCONFIG is a DYNAMIC parameter.