Considerations for an unloaded data set used for reorganization
Unloaded data sets that are created under certain conditions cannot be reloaded with the IMS HD Reorganization Reload utility (DFSURGL0).
A data set created by FABHURG1 in *HD format or by FABHFSU in UL format can be used as input for the IMS HD Reorganization Reload utility (DFSURGL0). If you create an unloaded data set by specifying a DECN control statement for a database that contains a compressed segment, that data set is not compatible with the unloaded data set created by the IMS HD Reorganization Unload utility. For details, see the following topics:You cannot reload such an unloaded data set by using the IMS HD Reorganization Reload utility (DFSURGL0), but you can reload it by using the IMS High Performance Load (Load utility or PSSR utility) or the IPR Reload utility.
There are the following differences, which do not affect DFSURGL0:
- IMS adds padding bytes of binary zeros to make the length of the segment even; FABHURG1 and FABHFSU do not.
- IMS overrides the BLKSIZE specified in the JCL with the computed values. FABHURG1 and FABHFSU is overridden by the BLKSIZE specified.