From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Anderson Subject: Re: Symbios-NCR 6285-3621 + Adaptec 2944W multilun problem Date: Fri, 12 May 2006 08:56:52 -0700 Message-ID: <20060512155652.GA24900@us.ibm.com> References: <44648D9C.2090602@cooperativaobrera.com.ar> <1147442986.3769.2.camel@mulgrave.il.steeleye.com> <44649CE5.7070604@cooperativaobrera.com.ar> <1147446596.3769.25.camel@mulgrave.il.steeleye.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e33.co.us.ibm.com ([32.97.110.151]:41904 "EHLO e33.co.us.ibm.com") by vger.kernel.org with ESMTP id S1751293AbWELP5E (ORCPT ); Fri, 12 May 2006 11:57:04 -0400 Received: from westrelay02.boulder.ibm.com (westrelay02.boulder.ibm.com [9.17.195.11]) by e33.co.us.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id k4CFuthP017903 for ; Fri, 12 May 2006 11:56:55 -0400 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by westrelay02.boulder.ibm.com (8.12.10/NCO/VER6.8) with ESMTP id k4CFutck165556 for ; Fri, 12 May 2006 09:56:55 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11/8.13.3) with ESMTP id k4CFusBO028647 for ; Fri, 12 May 2006 09:56:54 -0600 Content-Disposition: inline In-Reply-To: <1147446596.3769.25.camel@mulgrave.il.steeleye.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: Gabriel Gomiz , linux-scsi@vger.kernel.org James Bottomley wrote: > On Fri, 2006-05-12 at 11:34 -0300, Gabriel Gomiz wrote: > > I'm attaching dmesg output. I'm sorry I forgot to attach it in the > > last > > email. The I/O errors occur when the devices are being detected and > > whenever I try to access them. For example to do 'fsidk -l /dev/sdc'. > > Well, what I was hoping for was mode sense messages but, unfortunately, > there aren't any. My suspicion is that the 6285 is dual controller > running in RDAC mode and you're attached to the inactive controller (in > that configuration it allowed INQUIRY and MODE SENSE through but errors > out on all other I/O operations). I think you can verify by physically > removing one of the controllers and rebooting the array (or just attach > the SCSI cable to the other controller) I would agree with your suspicion as the error signature is similar to ones I receive using some FC based storage in RDAC mode. This problem is showing up more as we have more storage support move from other multipath solutions implemented in the mid-layer to using device mapper. -andmike -- Michael Anderson andmike@us.ibm.com