Thanks Marcy. That is a good thought. Unfortunately, EREP doesn't even log errors unless there are 10 consecutive failures. So intermittent errors can go unrecorded. Depending on how Linux counts, that could be possible.
We had issues on about a dozen Linux guests spread across 4 z/VM LPARs that share this DASD subsystem. There are over 500 Linux guests on these LPARs. This does not make much sense. I am supposed to make the same kind of change on our production systems but I can't take a risk of this kind of problem. This is not good! Rick On Tue, Jul 9, 2013 at 1:04 AM, Marcy Cortes <marcy.d.cor...@wellsfargo.com>wrote: > Do you have any errors on any of these new paths? I recently learned > linux will switch to read only after 256 failed i/o. Any erep records > generated? > > > Marcy. Sent from my BlackBerry. > > > ----- Original Message ----- > From: Rick Barlow [mailto:rrhbar...@gmail.com] > Sent: Monday, July 08, 2013 10:42 PM Central Standard Time > To: LINUX-390@VM.MARIST.EDU <LINUX-390@VM.MARIST.EDU> > Subject: Re: [LINUX-390] Where does Linux store path information for dasd > devices? > > That is what I thought too. However, some guests are having issues. Some > parts of lvm groups switched to r/o. Some page errors. It is not > consistent. I'm confused! > > Rick Barlow > Nationwide > > > On Mon, Jul 8, 2013 at 11:34 PM, Scott Rohling <scott.rohl...@gmail.com > >wrote: > > > I would think this would be transparent to a guest .... it's path will be > > the minidisk .. which won't change - unless I misunderstand what you > mean > > by switches. Are you presenting the DASD as minidisks, or attaching > them? > > Either way I don't see the pathing changing at the Linux level. > > > > Scott Rohling > > > > > > On Mon, Jul 8, 2013 at 8:12 PM, Rick Barlow <rrhbar...@gmail.com> wrote: > > > > > I have many Linux guests running on z/VM. We are in the process of > > > migrating ECKD DASD from old switches to new switches. I am trying to > > find > > > out how Linux stores the paths information, how to display what Linux > > > thinks and whether there is a way to tell Linux to re-validate its path > > > information. > > > > > > Thanks, > > > Rick Barlow > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
