Syntax of the ALTERDS command


            .--------.                        
            V        |                        
>>-ALTERDS----dsname-+--+-----------------+--------------------->
                        +-FREQUENCY(days)-+   
                        '-SYSFREQUENCY----'   

>--+-----------------+-----------------------------------------><
   +-VERSIONS(limit)-+   
   '-SYSVERSIONS-----'

Note:

You can specify VERSIONS or SYSVERSIONS, FREQUENCY or SYSFREQUENCY, or a combination of these parameters with the ALTERDS command, but you must specify at least one parameter with the ALTERDS command to change the backup parameters.
Due to the order of processing to determine eligibility for backup, DFSMShsm checks certain conditions prior to processing the ALTERDS parameters. For example, DFSMShsm fails a data set with an unsupported data set organization prior to checking the ALTERDS parameters.

Note: