From owner-freebsd-stable@FreeBSD.ORG Fri Sep 11 16:00:33 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 AA06A1065670 for ; Fri, 11 Sep 2009 16:00:33 +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 30A5B8FC17 for ; Fri, 11 Sep 2009 16:00:32 +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 n8BG0Vb9093284; Fri, 11 Sep 2009 19:00:31 +0300 (EEST) (envelope-from mamalos@eng.auth.gr) Message-ID: <4AAA741A.7040105@eng.auth.gr> Date: Fri, 11 Sep 2009 19:00:26 +0300 From: George Mamalakis User-Agent: Thunderbird 2.0.0.19 (X11/20090226) MIME-Version: 1.0 To: Artis Caune References: <4AA90D88.4010004@eng.auth.gr> <9e20d71e0909110601kaa87f2em2e4e618b8feb306b@mail.gmail.com> In-Reply-To: <9e20d71e0909110601kaa87f2em2e4e618b8feb306b@mail.gmail.com> 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: Fri, 11 Sep 2009 16:00:33 -0000 Artis, and the rest of the guys, thank you all for your answers. Ivan, I was thinking of using one of the techniques you mention (create two volumes, install fbsd on one of them, and use GTP on the second drive), but I was wondering if there would be any "incompatibility" issues with tools like df, etc. Artis, let me get to your comments now: > Same problem here, thought we got timeouts also on idle boxes. > > IBM support told to switch controller channel speed from auto(3Gbps) > to 1.5Gbps and update ServeRaid firmware. We are currently running > 5.2.0-15429 (flashing them almost monthly :) ). You can change speed > in raid bios, in Ctrl-A menu. > But this issue is only with sata disks, sas works perfectly. > > In case I do this (since I only have sata drives), will I end up with degraded disk performance? Theoretically I assume not, since 1.5 Gbps is adequate for *each* disk (it calculates to something like ~178MBps); but have you tried it on your disks, and everything works OK since (along with performance)? Thank you all again for your answers, you've been truly helpful! -- 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