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Status Delivered
Workspace z/OS
Categories DFSMS HSM
Created by Guest
Created on Jul 6, 2021

RELATED IDEAS

DFSMShsm PARTREL RC08 RSN94 is not reflected in MIGLOG via a message

We recently had issues with very large striped datasets that filled our storage.
We couldn't find why DFSMSHSM did not do partrel processing on these datasets.
Turn out that DFSMSHSM treats stiped datasets as multivolume datasets and hence does not do PARTREL processing on a multivolume dataset.
The only way to find out what is going on was, opening a case and had development analyse a PDA trace.
A PARTREL message in the miglog with RC08 RSN94 would have made debugging much easier.

Idea priority Medium
  • Guest
    Reply
    |     Nov 21, 2022
    If the following patches have been applied, then during volume migration or volume backup, DFSMShsm issues an ARC0734I message for each supported SMS-managed data set even though it does not meet the selection criteria. The reason code issued with the message explains why the SMS-managed data set does not qualify for selection. For interval migration, return code 45 with reason codes less than 90 are not produced regardless of the patch.

    Entering the following PATCH command causes the extra messages to be issued for SMS-managed data sets that were not selected for volume migration:
    PATCH .MGCB.+26 X'FF'

    Entering the following PATCH command causes the extra messages to be issued for SMS-managed data sets that were not selected for volume backup:
    PATCH .BGCB.+24 X'FF'
  • Guest
    Reply
    |     Oct 27, 2022
    DFSMShsm has a patch, .MGCB.+26, that when set to x'FF' will cause an ARC0734I messages to be issued for SMS-managed data sets that were not selected for space management. Information about the patch can be found at the following link:
    https://www.ibm.com/docs/en/zos/2.5.0?topic=pdp-determining-why-sms-managed-data-sets-are-not-processed.

    This patch will also be added to the set of tuning patches that are documented in the DFSMShsm Implementation and Customization Guide.

    If you would also like to enable FSR recording for data sets that are not selected please have a look at the patch, .MGCB.+EF. The documentation is here:
    https://www.ibm.com/docs/en/zos/2.5.0?topic=tpsbd-enabling-fsr-records-be-recorded-errors-reported-by-message-arc0734i-found-during-sms-data-set-eligibility-checking-primary-space-management

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