/sys$common/syshlp/helplib.hlb SET, FILE, /RU_FACILITY, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The SET FILE/RU_FACILITY command allows you to identify the
    recoverable facility that controls active recovery units on the
    file. You can use any other SET FILE qualifier with the /RU_
    FACILITY qualifier.

    When a data file has active recovery units and RMS journaling
    cannot resolve the recovery units (for example, if the recovery
    unit journal is unavailable), the data file cannot be opened
    or deleted. The presence of active recovery units prevents you
    from unmarking (or marking) a file for any journaling type. With
    the SET FILE/RU_FACILITY/RU_ACTIVE command, you can clear the
    designated recoverable facility that controls active recovery
    units for the data file.

                                 CAUTION

       When you clear the RU_FACILITY attribute (with the command
       SET FILE/RU_ACTIVE=0/RU_FACILITY=1), the data in the file is
       likely to be in an inconsistent state. Do not use the data
       file unless you can ensure that the data is consistent.
       After clearing the RU_ACTIVE attribute, you can unmark
       the file for journaling, delete the file, and re-create a
       consistent file using a backup copy.

    You can determine the recoverable facility that controls active
    recovery units (if any) for the file by entering the DCL command
    DIRECTORY/FULL or DUMP/HEADER. You can use the ANALYZE/RMS_
    FILE/RU_JOURNAL command to determine the state of any active
    recovery units.