From owner-freebsd-performance@FreeBSD.ORG Fri May 11 14:59:45 2007 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6666C16A403 for ; Fri, 11 May 2007 14:59:45 +0000 (UTC) (envelope-from tom@tomjudge.com) Received: from s200aog10.obsmtp.com (s200aog10.obsmtp.com [207.126.144.124]) by mx1.freebsd.org (Postfix) with SMTP id A9C0613C457 for ; Fri, 11 May 2007 14:59:44 +0000 (UTC) (envelope-from tom@tomjudge.com) Received: from source ([217.206.187.80]) by eu1sys200aob010.postini.com ([207.126.147.11]) with SMTP; Fri, 11 May 2007 14:59:41 UTC Received: from [10.0.0.89] (bill.mintel.co.uk [10.0.0.89]) by rodney.mintel.co.uk (Postfix) with ESMTP id BE3F118141C; Fri, 11 May 2007 15:59:41 +0100 (BST) Message-ID: <46448533.40207@tomjudge.com> Date: Fri, 11 May 2007 16:01:07 +0100 From: Tom Judge User-Agent: Thunderbird 1.5.0.10 (X11/20070306) MIME-Version: 1.0 To: Randy Schultz References: <464474F0.3040306@tomjudge.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-performance@freebsd.org Subject: Re: possible issues with Dell/Perc5 raid X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 May 2007 14:59:45 -0000 Randy Schultz wrote: > On Fri, 11 May 2007, Tom Judge spaketh thusly: > > -}> -- > -} > -}From the boot messages you have included below it seems that you have a Dell > -}SAS-5i (Internal PCIe) controller and not a Perc/5[ie]. > > Tnx Tom. Yeah I knew that but didn't catch it in the Subject: The perc/5 is > on another machine. > > -} > -}The SAS-5 known to have very poor performance (1Mb/s 100%busy) under certain > -}loads (cvsup). > > Hmm. Did not know that. > > Since I have a second machine just like this one, I also think I'm going to > try pulling out the SAS 5i card and going with a software mirror package like > gvinum or gmirror. Given the #'s Bill Moran posted and the horrible #'s you > list above, this may be a viable option. > I have 6 boxes with the SAS5i controller in them so far we have replaced 2 of the controllers with Areca PCIe controllers. However I have yet to test the performance of them (they are supposed to be very good). Tom