GT.M adds a prefix rolled_bak_ to the journal file whose entire contents are eliminated (rolled back) by a backward recovery. GT.M does not use these files after a successful recovery therefore you might want to consider moving or deleting them. You should never use rolled_bak* files for any future database recovery. If there is a need to process rolled_bak* files, you should extract the journal records  and process them using an M program. FIS recommends that you rename the roll back journal file immediately after a rollback if you want to save it, to prevent a subsequent rollback from overwriting it.