It was also useful when creating a backup so that the backup was not on the
same device as the original.
I noticed this...
JCL example
z/OS V1R12.0 Metal C Programming Guide and Reference
SA23-2225-03
...
//SYSUT1 DD UNIT=(SYSDA,SEP=SYSLIB),SPACE=(CYL,(10,5)),DSN=&SYSUT1
Dan
-----Original Message-----
From: Binyamin Dissen
Back in Ye Olde days, it allowed for specifying that a different device
address be used thus improving I/O performance.
On Thu, 29 Aug 2013 20:48:30 +0000 "Pommier, Rex R."
<Rex.Pommier> wrote:
:>OK, what does (did) SEP= do? The only thing the JCL reference says is
that you can't use it as a JCL symbol in certain types of jobs.
:>
:>-----Original Message-----
:>
:>I just found the following in some IBM same JCL (job, actually):
:>//SYSUT1 DD UNIT=(SYSDA,SEP=(SORTLIB,SYSLMOD,SYSLIN)),
:>// SPACE=(1000,(60,20))
:>
:>Last change date is half of the 2013 (creation date is probably 2005 or
so).
:>As far as I know SEP is syntax checked and ignored for many moons, at
least since first OS/390, but I vaguely remember somebody told me it was
obsoleted with advent of MVS.
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