From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Subject: Re: multipath-tools-0.4.4 on 3par unknown path failure issue Date: Fri, 12 Aug 2005 11:04:07 -0500 Message-ID: <20050812160407.GA24832@thumper2> References: <42FA7674.4070201@mail.communityconnect.com> <20050811195540.GA16665@thumper2> <42FBB2CC.2040508@mail.communityconnect.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <42FBB2CC.2040508@mail.communityconnect.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids On Thu, Aug 11, 2005 at 04:19:24PM -0400, Alan Kasindorf wrote: > > >I've had problems like this happen to me on 3par too. What kernel version > > However, I'd like to know what the exact issue is. I'm not exactly great > on eliciting issues with the linux kernel right now. How were you > monitoring what events the SAN was sending up through the card? I could > use this to at least verify what is happening if/when we lose another > mount. None of our servers were being rebooted when this happened though. > My issue was that I was getting I/O errors when other systems were rebooted (and occasionally other times, reboots consistently would cause a problem), and those I/O errors would cause the mount to drop. Somehow I got the idea that turning off failfast might help and it did. I have not monitored what events the SAN was sending the card, all I did was turn on debugging in the qla2xxx drivers and ask Andrew Vasquez (qlogic developer) about them. Andy