Considerations for the Image Copy function (DFSUDMP0 JCL)

The following considerations apply to using the Image Copy function with IMS compatible JCL.

  • DBRC must be active when creating image copies of a HALDB or the IMS catalog.
  • If you enable the HD Pointer Checker HASH Check option for a HALDB or the IMS catalog and use DBDs in the DBD library, you must invoke DFSUDMP0 from DFSRRC00 and specify a ULU region.
  • Image copies of the HALDB primary index and ILDSs are not created.
  • Image copies cannot be created for a partition data set while the integrated HALDB Online Reorganization function is reorganizing the partition.
  • IMS catalog must be registered to DBRC.
  • If you enable the HD Pointer Checker HASH Check option and create image copies of the IMS catalog, all partition data sets of the IMS catalog must be processed in the same job step.
  • If the IMS management of ACBs is enabled, image copies of the following additional system data sets, which are used to manage the ACBs, are not created:
    • IMS directory data sets
    • Bootstrap data set
    • Staging data set
  • HPIO=Y|N|X can be used only if DFSUDMP0 is invoked directly.
  • To run the Image Copy function in an IMS-managed ACBs environment, the following requirements must be met:
    • The IMS catalog is registered to the DBRC RECON data sets.
    • If IMS HP Image Copy needs to access control blocks from the IMS catalog, CATALOG=YES and ACBMGMT=CATALOG are specified in the IMS Catalog Definition exit routine (DFS3CDX0).
    • The program name on the EXEC statement in the JCL is PGM=DFSUDMP0.
  • In the IMS-managed ACBs environment, multiple-step HASH Check for full-function databases is not supported.