Multiple FILES are supported for Restore, Deferred Restore, and Recover processing. If you want to make them all available to these functions, you should use the MFILES DD statement instead of the FILES DD statement. Add each data set name to the MFILES concatenation; up to 256 data sets are supported. If using a concatenation of all Files Data Sets (FDS) or a mixture of FDS and Files Database (FDB), then the order of the concatenation determines the order of search for the data set to be restored. The first one that contains an index record for the archived data set will be used, even if another contains a more recent version of the data set. Therefore, it is very important that they be specified an index record for the archived data set will be used, even if another searched as logically joined so the most current version of the data set is found regardless of the concatenation order.
Note: The MFILES DD statement is not supported in Dispose processing. If you have more than one FILES, you must execute DISPOSE separately for each one.
We do not recommend concatenating data sets. If you concatenate data sets, you will get errors.
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