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:
- For FABHURG1, see DEC control statement.
- For FABHFSU, see DEC control statement.
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.