Summary of the tasks to perform

Perform the following tasks:

Use the RETENTIONMETHOD parmlib option if you want to set a default system-wide retention method. If you do not specify a default retention method, the system uses the VRSEL retention method as default. Set system wide parmlib OPTIONs: default retention period RETPD, the maximal retention period MAXRETPD, and CATRETPD, EXPDTDROP, MOVEBY, RETAINBY, VRSDROP, VRSJOBNAME, VRSCHANGE, VRSMIN, and VRSRETAIN in the parmlib member EDGRMMxx. For the EXPDT retention method, specify OPTION RETENTIONMETHOD(EXPDT(RETAINBY() LASTREF())) in the parmlib member EDGRMMxx. See z/OS DFSMSrmm Implementation and Customization Guide for information on the OPTION RETENTIONMETHOD parmlib operand.
Optionally update the EDG_EXIT100 installation exit to set the retention method to be used for new tape data. See z/OS DFSMSrmm Implementation and Customization Guide for information on the EDG_EXIT100 installation exit.
You can set the retention method of a new volume and the RETAINBY value when adding it to DFSMSrmm by using the RMM ADDVOLUME RETENTIONMETHOD command, as described inADDVOLUME: Adding volume information.
If you want to change the retention method and the RETAINBY value of a master or user volume or multivolume set use the RMM CHANGEVOLUME RETENTIONMETHOD against the volume or the first volume of the multivolume set. All volumes in the multivolume set will automatically get the same retention method. See CHANGEVOLUME: Changing volume information for more information.