Considerations for the Recovery function

Certain considerations apply to using the Recovery function with the FABJMAIN program.

To run the Recovery 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).

To recover a database data set by using an image copy data set that is created by the COPY process of Advanced Image Copy Services (Fast Recovery image copy) or by the IMS Database Image Copy 2 utility (DFSUDMT0), ensure that the allocation attributes of that database data set have not changed. The Recovery function fails if the allocation attributes are different.

When you recover a database data set from an image copy data set that is created in Fast Recovery image copy format, dynamic allocation of output database data set is done by DFSMSdss. If you preallocated database data set manually and its attributes do not match the image copy data set in Fast Recovery image copy format, the DFSMSdss COPY function deletes the preallocated data set and allocates a new data set using the data set attributes of the input data set. It is not recommended to use a preallocated database data set when you recover a database from an image copy data set that is in Fast Recovery image copy format.