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Can DFHSMShsm be used with Librarian Master files?


Article ID: 237091


Updated On:




Planning to use IBM DFSMShsm installed in z/OS for data set management, etc.

Are there any impacts of using DFSMShms with Librarian?



Release : 4.4

Component : Librarian


Do not recommend using DFHSMShsm to backup Librarian Master files.
The only recommended method for backing up Librarian Master files is using the Librarian Backup Procedures and utility:
If the first block of the Master file gets modified by DFSMShsm, it will corrupt the Master and make it unusable.  Have seen Archived / Migrated Master files get corrupted when the Master file is restored.     
If DFSMShsm is intended to do Migrations and Archiving, need to have a Librarian backup that can be used to restore the Master file incase the Master file gets corrupted during the recall.