My comment was meant more for z/OS release upgrades. In some of our sysplexes, we run both old and new releases for some period before full migration. I guess it's somewhat risky, but we generally rebuild SAD when the first member gets upgraded. If we were shot at, we were missed. ;-)
. . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW robin...@sce.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Jim Mulder Sent: Wednesday, September 27, 2017 12:42 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: (External):Re: DLIB volume for SAD I don't know of any SADMP PTFs that were not downward compatible within the same release of z/OS, and we would certainly try to avoid creating that scenario. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY > In addition the SAD IPL volume should in principle be compatible with > the level of z/OS that might use it. Periodically changes are made to > SAD by a PTF whose ++HOLD instructs you to rebuild SAD. It could > conceivably happen that an older level of z/OS might have trouble with > a higher level SAD IPL volume, but I've never seen it. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
