A PDS is stored on tape in unloaded sequential format. It cannot be used in any way as a PDS -- it MUST
be restored to a disk PDS file before you can access any of the members. The JCL I previously provided could be used -- add a DD statement pointing to tape and a fourth COPY statement:
You cannot, however, directly copy the three PDS files to a single tape file -- you could create three separate files on the tape but not a single file.