Possible data loss for EAV Users on releases z/OS 1.11, 1.12 and 1.13 using DSS Logical Dump or HSM Migrate and Backup processing
DSS may skip some of the user's data set during dump processing and result in a failure when attempting to Restore, Recall or Recover these data sets. This failure will prevent any of the data set from being restored. The problem can occur when using EAV volumes with data sets in the EAS region (Extended Addressability Space - cylinder managed region) where the addresses of the data set extents are not in ascending cylinder order, ie. the CCCH address of a later extent is less than a previous extent.
Please see APAR OA38942 for additional information and actions to determine exposure.
Apply ++APAR for OA38942
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