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What is New in DFSMSrmm

An IBM Redbooks publication


Published on 18 December 2023, updated 18 December 2023

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ISBN-10: 0738461369
ISBN-13: 9780738461366
IBM Form #: SG24-8529-01

Authors: Ryan Bouchard, Larry Coyne, Parker Mathewson, Michael Scott, Samuel Smith and Karim Walji

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    DFSMSrmm is an IBM z/OS feature that is a fully functioning tape management system to manage your removable media. In the last decade, many enhancements were made to DFSMSrmm. This IBM Redbooks publication is intended to help you configure and use the newer functions and features that are now available.

    Discussion of the new features is included along with use cases. Hints and tips of various common DFSMSrmm problems and useful configuration and reporting JCL also are included.

    This publication is intended as a supplement to DFSMSrmm Primer, SG24-5983, which is still the recommended starting point for any users new to DFSMSrmm.

    Table of Contents

    Chapter 1. External Data Manager function

    Chapter 2. Retention methods in DFSMSrmm and the use of the expiration date

    Chapter 3. Introduction to the Defaults Table

    Chapter 4. Using SMS Management Class to assign tape expiration values

    Chapter 5. Logical Write Once Read Many changes

    Chapter 6. General Data Protection Regulation changes

    Chapter 7. z/OSMF GUI plug-in for DFSMSrmm

    Chapter 8. ONLYIF system option for EDGRMMxx

    Chapter 9. CDSFULL command for EDGRMMxx

    Chapter 10. Global Resource Serialization recommendations for RMM data sets

    Chapter 11. Disaster Recovery and Disaster Recovery testing with the TS7700

    Chapter 12. Partitioning examples with OPENRULE and PRTITION parameters

    Chapter 13. Expire Hold setting and available scratch count

    Chapter 14. Common problems in DFSMSrmm

    Chapter 15. DFSORT JCL for use with DFSMSrmm

    Appendix A. Using EDGRMMxx global defaults for assignment of retention attributes case study

    Appendix B. Using Defaults Table for expiration attributes assignment case study

    Appendix C. Using Management Class for assignment of expiration attributes case study

    Appendix D. Using mixed retention methods VRSEL and EXPDT case study

    Appendix E. Using Management Class and Defaults Table together case study

    Appendix F. Using MCATTR(ALL) instead of MCATTR(VRSELXDI) case study

    Appendix G. Key takeaways from the case studies


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