Generally I would strongly recommend to vary the CHPIDs offline prior to swap the cards minimizing related error recovery efforts when accidentally catching an I/O operation in the middle ... regardless whether running z/OS, z/VM, or Linux. Without any specifics about the nature of your problems and the service level you were running back then it is hard to judge whether you unveiled a possible bug, though. Did you involve IBM or distributor service at that time?
Linux on 390 Port <[email protected]> wrote on 19.02.2006 02:53:39: > > > Ingo Adlung wrote: > > VM doesn't shield from Linux that there is 6 paths available, but Linux > > sees them, too. I.e. if you vary CHPIDs offline the guest Linux will also > > see them disappear. But you are also on the safe side with Linux as we can > > handle channel outages, no matter if running under VM or LPAR. Assuring > > such is part of a rigid device qualification program :-) > > > > That is nice to know. However when we swapped cards some time ago when > Linux was running on bare metal, we had problems. Perhaps we did not > vary off the channel on the linux lpar before we swapped the cards? > > Linux on 390 Port <[email protected]> wrote on 18.02.2006 02:45:22: > > ... Mit freundlichem Gruß / Best regards, Ingo Adlung ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
