As a practical matter, the SAD IPL volume needs enough space to contain the SYS1.PAGEDUMP.Vxxxxxx data set, which seems to be 92 tracks at z/OS 2.1. Furthermore, the volume needs to be reachable--not necessarily online--from every MVS image that might conceivably need to take SAD. Depending on your configuration, you may need more than one SAD IPL volume.
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. . . 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 [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Jim Mulder Sent: Wednesday, September 27, 2017 10:25 AM To: [email protected] Subject: (External):Re: DLIB volume for SAD The only restrictions on the SAD IPL device is that it must not contain a page data set for the system being dumped, and it must not be used as an output device for this dump. Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY > This is general question. > > For the SAD(Standalone dump) IPL, why do we chose DLIB volume UCB ? > How does DLIB volume helps in SAD process ? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
