On Thu, 3 Feb 2022 at 12:59, Radoslaw Skorupka <[email protected]> wrote:
> BTW: current z/OS 2.4 still supports UNIT=SEP construct in JCL. Yes, it
> is ignored, but still syntactically correct.
> AFAIK this parameter predates MVS. :-)
Not only does it predate MVS, but the very first release of MVS
("OS/VS2 Release 2") ignores SEP so that SRM (remember that...?) can
swap address spaces with the expectation that their effect +- on I/O
will be less spread around.
So SEP= has been ignored for about 50 years, but as you say, it's
still accepted. And it's not even so unusual to see JCL with it.
Tony H.
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