From owner-freebsd-hardware@FreeBSD.ORG Wed Nov 14 10:27:50 2007 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E7B6F16A41A for ; Wed, 14 Nov 2007 10:27:49 +0000 (UTC) (envelope-from jason.thomson@mintel.com) Received: from s200aog11.obsmtp.com (s200aog11.obsmtp.com [207.126.144.125]) by mx1.freebsd.org (Postfix) with SMTP id 8E77713C4C4 for ; Wed, 14 Nov 2007 10:27:47 +0000 (UTC) (envelope-from jason.thomson@mintel.com) Received: from source ([217.206.187.80]) by eu1sys200aob011.postini.com ([207.126.147.11]) with SMTP; Wed, 14 Nov 2007 10:27:43 UTC Received: from [10.0.62.5] (unknown [10.0.62.5]) by rodney.mintel.co.uk (Postfix) with ESMTP id CE81C18141F; Wed, 14 Nov 2007 10:09:55 +0000 (GMT) Message-ID: <473AC973.70509@mintel.com> Date: Wed, 14 Nov 2007 10:09:55 +0000 From: Jason Thomson User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7) Gecko/20040616 X-Accept-Language: en, en-us MIME-Version: 1.0 To: Simon References: <20071113234334.920B213C442@mx1.freebsd.org> In-Reply-To: <20071113234334.920B213C442@mx1.freebsd.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Sean McAfee , Benjie Chen , "freebsd-hardware@freebsd.org" Subject: Re: PERC5 (LSI MegaSAS) Patrol Read crashes X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Nov 2007 10:27:50 -0000 We have ~20 Dell servers with 6.x and Perc5. Automatic PR is enabled on all of them, and happens once a week without any problems (so far - since July). Obviously, from the thread, manual Patrol Reads cause a definite problem, but it's not clear that the initial problem had the same symptoms - just that there was a correlation between the automatic Patrol Reads and the server lockup? I guess it may be that under heavy load (exacerbated by PR) something else gets screwed up and causes the machine lockup? Simon wrote: > So everyone that uses Dell servers with Perc5 and 6.x disables automatic PR? > > -Simon > > --Original Message Text--- > From: Benjie Chen > Date: Tue, 13 Nov 2007 17:50:41 -0500 > > If you disable PR, the problem will go away. Below are some useful commands. Sean mentioned that you could disable it, then set it to do an automatic PR 1 hour after you restart the automatic PR. automatic PR does not crash the system > definitively, but manual PR does. So during your downtime, you could try to do an automatic PR... > > # Disables patrol reads on all adapters > megacli -AdpPR -Dsbl -aALL > > # Enables automatic patrol reads > megacli -AdpPR -EnblAuto -aALL > > # Sets the interval for automatic reads to 1 hour - it only > > # accepts whole numbers so that's the lowest you can go > megacli -AdpPR -SetDelay 1 -aALL > > > Some other useful ones: > > # Patrol read settings and information > megacli -AdpPR -Info -aALL > > # Extended information > > megacli -AdpAllInfo -aALL > > # Export controller's event log to file > megacli -AdpEventLog -IncludeDeleted -f -aALL > > # More logging > megacli -FwTermLog -Dsply -aALL > > > On 11/13/07, Simon wrote: Hello, > > I'm just wondering, was this ever resolved? I was about to start using > new 2950 with Perc5 in it, but now I'm afraid to as I cannot afford > downtime. Why this is still a linux hack is beyond me. The way Dell > is doing, they ought to have a port specifically for FreeBSD > > If I disable PR altogether (not sure if this is possible, yet), although I > don't see why it wouldn't be, would the mentioned problem go away? > > Thank you, > Simon > > > On Mon, 01 Oct 2007 17:26:29 -0400, Sean McAfee wrote: > > >>John Baldwin wrote: >> >>>On Saturday 29 September 2007 09:18:17 pm Benjie Chen wrote: >>> >>>Hmm, I haven't tried with megacli, but an internal tool at work is able to >>>start manual patrol reads w/o causing a crash, and I've also seen production >>>boxes running automatic patrol reads w/o causing crashes. Do you have to >>>have a certain load before it will crash? > > >>The crashes that we've seen in production have occurred while patrol >>reads kick off under moderate-high load, but in testing, an automatic >>read will complete fine. Even with maxed-out I/O*, we haven't been able >>to come up with reliable testing scenario to trigger crashes on >>automatic patrol reads. > > > >>(*My base testing scenario involved running a pretty heavy stress [as in >>the program available in ports], while repeatedly copying ports & src > >>from an NFS mount to another local mountpoint and SCPing a large file in > >>a loop from another machine.) > > > >>Sean McAfee >>Collaborative Fusion, Inc. >> smcafee@collaborativefusion.com >> 412-422-3463 x 4025 > > >>1710 Murray Avenue, Suite 320 >>Pittsburgh, PA 15217 > > >>**************************************************************** >>IMPORTANT: This message contains confidential information >>and is intended only for the individual named. 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