From owner-freebsd-stable@FreeBSD.ORG Thu Sep 10 16:53:12 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0BA891065672 for ; Thu, 10 Sep 2009 16:53:12 +0000 (UTC) (envelope-from mamalos@eng.auth.gr) Received: from vergina.eng.auth.gr (vergina.eng.auth.gr [155.207.18.1]) by mx1.freebsd.org (Postfix) with ESMTP id 847398FC15 for ; Thu, 10 Sep 2009 16:53:11 +0000 (UTC) Received: from mamalacation.ee.auth.gr (mamalacation.ee.auth.gr [155.207.33.29]) by vergina.eng.auth.gr (8.14.3/8.14.1) with ESMTP id n8AGrAeo070255; Thu, 10 Sep 2009 19:53:10 +0300 (EEST) (envelope-from mamalos@eng.auth.gr) Message-ID: <4AA92EF1.6010804@eng.auth.gr> Date: Thu, 10 Sep 2009 19:53:05 +0300 From: George Mamalakis User-Agent: Thunderbird 2.0.0.19 (X11/20090226) MIME-Version: 1.0 To: Ivan Voras References: <4AA90D88.4010004@eng.auth.gr> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Sep 2009 16:53:12 -0000 Ivan, thank you very much for answering; and now to your comments: > > 3650 M1 or M2? > On the box it writes x3650 (I forgot the initial 'x' before, sorry). > > You have received this message because you are running a debug kernel; > a normal kernel with debugging disabled would not have shown it. > So far, I understood :) > It looks like the controller was too busy rebuilding to take any new > requests. It is possible you have filled the controller's write cache > and that is why the lag happened at this point. You can easily test > this theory. > This is the exact reason why I am asking this question. If this behavior is normal, then there is no problem with me. But I couldn't be sure whether it was a driver's problem or a controller's problem. > > If you determine rebuild/resync is problematic, you might consider > using a RAID mode that doesn't require it to be so extensive, like > RAID 10 with 4+ drives, or software RAID with ZFS. > I was thinking of using other raid modes, along with ZFS (although still labeled 'experimental', and this is going to be our department's main file server, so I still have my second thoughts about it...), since FreeBSD does not recognize my 2.8T volume during installation. This means that I 'll have to break it into more volumes in order for FreeBSD to see it. Thank you for your answer again, and (now that you mentioned it:) ) in case anyone knows whether we'll be able to see partitions > 2T in the future (or now?!), please say how :). -- George Mamalakis IT Officer Electrical and Computer Engineer (Aristotle Un. of Thessaloniki), MSc (Imperial College of London) Department of Electrical and Computer Engineering Faculty of Engineering Aristotle University of Thessaloniki phone number : +30 (2310) 994379