CLIENT data files that have been migrated from Mainframe disk storage to a secondary storage media. When a CLIENT accesses one of these data files, it is automatically restored to Mainframe disk storage for processing.
A Tape Management System (TMS) tracks all data stored on tape. Charges are based on the amount of data and the amount of time the data is stored on tape. To maximize tape utilization, a tape may contain data for more than one CLIENT.