DFSMShsm allows you to specify the desired level of tape utilization (fullness) for a backup or migration tape volume written in single-file format. You can use the full tape volume, meaning that DFSMShsm writes until reaching the physical end of volume (EOV). However, the recommended method is to specify a percentage to indicate how much of the tape should be used before considering it full. DFSMShsm then forces a logical end of volume with this method.