On Wednesday, 07/26/2006 at 09:25 EST, "Jeff Gribbin, EDS" <[EMAIL PROTECTED]> wrote: > Seriously, what in your opinion are the odds that a problem with a paging > volume on a running system that's having NO OTHER paging problems could > produce the symptoms of ONLY and ALWAYS failing on IPL vdev?
I'm just trying to be practical. If you call the Support Center with a Paging I/O Error, the first thing they will do is ask you to reformat your paging volumes. Then, if you are still having the problem, they will give you TRSOURCEs to run that will help them figure out why. (I verified this with them.) Unfortunately Ed is on z/VM 4.3 and unsupported, though he *did* call it in and the Support Center worked with him a little bit. The paging error is occuring in the routine that actually pages out the affected page. Without further debug, we'll never know the exact reason. (I've also learned from the Support Center that CP doesn't always issue an ERP message to the operator's console for paging I/O errors.) But what are the odds that Ed is the only person who is experiencing this problem? There is something unique about his system. And 4.3 got quite a workout from the rest of you. The #1 reason for HCPCLS174E is an improperly formatted paging or spooling volume (remember CP paging overflow). When we hear hoofbeats, we think "horses", even though zebras or antelope may be the cause. It's like going to the Doctor. :-) > Finding out if IPL CLEAR works and checking with Support for known > problems are both (in my view) even simpler and easier and even negative > answers will at least move Ed's understanding forward. Rob's TRSOURCE > suggestion also looks like effort that one can expect to bear some fruit > even if, again, it's of a negative nature. By all means, anyone who feels at home with TRSOURCE and wants to hunt for the error should feel free. > I'd be nervous about IPLing without understanding the problem - if for no > other reason than potentially destroying the evidence without ever > identifying the cause. (This is, of course, Ed's call - does he want to > identify the problem or is he happy for it to just, "go away" - if the > latter and it's not too disruptive to his community then maybe an IPL is > justified ...) I don't see any need to IPL. Just attach the new paging volume and drain the old one. Alan Altmark z/VM Development IBM Endicott
