SET FILE/RU JOURNAL
SET FILE/RU_JOURNAL is a DCL command that marks an RMS file for recovery unit journaling. The SET FILE command is not supported for remote files. You must use the SET FILE command from the system where the file is located.
Requires read (R), write (W), and control access. Being the ownerof the file is one way to get Control access.
SET FILE/[NO]RU_JOURNAL[=volume-name] data-filespec[,...]