From owner-freebsd-questions@FreeBSD.ORG Tue Jan 16 18:13:59 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 4627E16A412 for ; Tue, 16 Jan 2007 18:13:59 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from mx00.pub.collaborativefusion.com (mx00.pub.collaborativefusion.com [206.210.89.199]) by mx1.freebsd.org (Postfix) with ESMTP id EA04613C461 for ; Tue, 16 Jan 2007 18:13:58 +0000 (UTC) (envelope-from wmoran@collaborativefusion.com) Received: from vanquish.pgh.priv.collaborativefusion.com (vanquish.pgh.priv.collaborativefusion.com [192.168.2.61]) (SSL: TLSv1/SSLv3,256bits,AES256-SHA) by wingspan with esmtp; Tue, 16 Jan 2007 13:13:58 -0500 id 00056458.45AD15E6.0000D213 Date: Tue, 16 Jan 2007 13:13:57 -0500 From: Bill Moran To: "Steven Lowry" Message-Id: <20070116131357.1c8972eb.wmoran@collaborativefusion.com> In-Reply-To: <53186.86.54.4.134.1168964729.squirrel@www.midden.org> References: <53186.86.54.4.134.1168964729.squirrel@www.midden.org> Organization: Collaborative Fusion X-Mailer: Sylpheed 2.3.0 (GTK+ 2.10.7; i386-portbld-freebsd6.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: Very Poor Raid Card Performance X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Jan 2007 18:13:59 -0000 In response to "Steven Lowry" : > > I have been very impressed with my FreeBSD 6.2 install, I have nearly > everything working but there are a few things which I need help with. > > The main problem is my HD performance, it is approx 6x slower than in > windows XP, hopefully there is a solution. I have an LSI Megaraid 8x with > four drives in a raid 5 configuration, in windows I was getting up to 60MB/s > transfer rates but in FBSD I am getting up to 9MB/s. I followed the > instructions in the handbook for tuning disks and I have set dma on. > Being new to unix, I have no idea what to try or get system information > too continue troubleshooting. > If anyone could point me in the right direction or to appropriate > documentation > it would be much appreciated. You should provide the details of how you arrived at those numbers. Please provide details of your testing methodology. While it's impossible to compare apples to apples when pitting Windows against FreeBSD, you at least want to be comparing two fruits -- not apples and buffalo steaks or something like that. -- Bill Moran Collaborative Fusion Inc.