Date: Mon, 7 Jun 2010 03:06:12 +0200 From: =?iso-8859-1?Q?St=E5le?= Kristoffersen <staalebk@ifi.uio.no> To: Matthew Jacob <mj@feral.com> Cc: freebsd-scsi@freebsd.org Subject: Re: mpt request timed out Message-ID: <20100607010612.GB19825@putsch.kolbu.ws> In-Reply-To: <4C0BB8E9.7030206@feral.com> References: <20100606014516.GA53735@putsch.kolbu.ws> <4C0B064A.3060206@feral.com> <20100606022651.GB53735@putsch.kolbu.ws> <4C0B07C6.3090804@feral.com> <20100606025027.GD53735@putsch.kolbu.ws> <4C0B20DA.2020200@feral.com> <20100606141932.GE53735@putsch.kolbu.ws> <4C0BB8E9.7030206@feral.com>
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On 2010-06-06 at 08:04, Matthew Jacob wrote: > > > >> Is it necessary to track further if all is okay after the first reset? > >> > > Oh, I might have misunderstood what you where asking about; > > It works fine untill the next timeout occurrs. Could be a few hours, could > > be 5 minutes. > > > > > Oh- okay. Then I guess we'd better work on fixing it. > > Can you describe the actually physical topology here? Is this an > internal backplane? One port on the LSI-controller is connected to the front internal backplane of a supermicro 847E1 chassis[1]. The other port on the controller is not connected, and the rear internal backplane is not connected to anything. I have tried to change the cable between the backplane and controller, without any effect. I've also tried to backport the changes in r198262 [2] since that looked like it could be related. That did not fix it either. I also tried to limit the depth of queue for tagged openings with camcontrol: camcontrol tags da0 -N 4 (and repeated for all the other disks connected) and that had some effect, when I got a stall after that change, I did not allways get the timeout message. [1]: http://www.supermicro.com/products/chassis/4U/847/SC847E1-R1400U.cfm [2]: http://svn.freebsd.org/viewvc/base?view=revision&revision=198262 -- Ståle Kristoffersen staalebk@ifi.uio.no
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