SET FILE/RU ACTIVE
SET FILE/RU_ACTIVE is a DCL command that designates the recoverable facility that controls active recovery units for the file. Alternatively, when used with the /RU_ FACILITY qualifier, the SET FILE/RU_ACTIVE command lets you clear the designated recoverable facility that controls active recovery units for the specified file. 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_ACTIVE=ru-facility data-filespec[,...]