How Tape Optimizer selects the copy utility to use

Usually, Tape Optimizer can automatically select the appropriate copy utility to use for copying tape data sets.

Tape Optimizer selects the copy utility based on the following criteria:

• The create program name that is recorded in DFSMSrmm™ for a data set.
• The tests that Tape Optimizer automatically performs on data sets that have a RECFM of U (Undefined) or an LRECL of 0, and a create program name other than ADRDSSU, to determine if they are ADRDSSU dump files. If a test returns RC=4, Tape Optimizer considers the data set to be an ADR dump file and will call ADRDSSU to copy it. If a test returns another return code, Tape Optimizer may call IEBGENER.
• Your setting for the Call ADRDSSU when Blocksize is 0 option. If you select this option, Tape Optimizer calls the ADRDSSU utility to copy data sets that have a block size of 0, regardless of their create program names.

For RECFM=U data sets, if Tape Optimizer cannot determine the copy utility to use based on any of these criteria, Tape Optimizer will select the copy utility based on the Call ADRDSSU when RECFM=U test fails setting in the Copy Options window and on any optional specifications that you define for specific data sets in the RECFM=U Specifications window. For more information, see Specifying copy options for a copy request and Setting the copy utility to use for specific RECFM=U data sets.