Hi Kees, I'm fairly sure we met before. I'm the Product Architect for CA Disk and have worked on it since 1983 when it was DMS/OS. I believe you are might be correct however there are other Factors. The z/OS V1R12.0 DFSMShsm Storage Administration manual states: You can control how long to keep extra backup versions for data sets, how long to keep the only backup version of data sets that have been deleted, and how long to keep specific backup versions. (DFSMShsm does not delete the only backup version of a data set that exists unless you specifically delete the backup version.) The attributes that control the number of days to keep extra backup versions are overridden by the attributes that control the number of versions to keep. That is, if you have more backup versions than are specified by the appropriate NUMBER OF BACKUP VERSIONS attribute, the excess versions are deleted by the EXPIREBV command even though they may not have reached the age specified by the RETAIN DAYS attributes. The retention period for a specific backup version can be specified with the RETAINDAYS keyword on the data set backup command. The value specified on the RETAINDAYS keyword overrides all other retention values. The RETAIN DAYS EXTRA BACKUP VERSIONS attribute controls the number of days that you keep backup versions that are older than the most recent one. You can specify values from 1 to 9999 or NOLIMIT for this attribute. If you use the NOLIMIT value, you can delete extra backup versions based on the following criteria: • The value you assign to the NUMBER OF BACKUP VERSIONS attribute. • The issuance of a DFSMShsm command to delete specific backup versions. • The value assigned to the RETAIN DAYS ONLY BACKUP VERSION attribute. Note:All remaining backup versions are deleted after the retention period specified if you assign a value other than NOLIMIT.
We would really have to know all the values specified in your management class to see when the backup copy should be expired. You have the SMSPRINT DD statement in Ixmaint that lists why we deleted the backup copy. What does it say? Marjory Montgomery, CA Technologies Software Architect ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
