All commands can be issued from the VMS prompt, $, or the memory
    disk driver user interface prompt, DECRAM>.

    You can access the DECram interface by defining a DCL foreign
    command symbol such as the following:

    $ DECRAM == "$MDMANAGER"
    $ DECRAM
    DECRAM>

    Requires AUDIT, CMKRNL, SYSLCK, SYSPRV, and PHY_IO privileges.

    You need to include only as much of the command as necessary to
    make it unique. Commands are not case sensitive.

    If you get the following, "%SYSTEM-E-UNSUPPORTED, unsupported
    operation or function" it means you entered an incorrect command
    parameter, qualifier, or combination that is not supported. Read
    the help on all the selected commands and/or qualifiers and then
    retry the command.