From owner-freebsd-current@FreeBSD.ORG Tue Oct 26 16:07:18 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 68D2A16A4CE for ; Tue, 26 Oct 2004 16:07:18 +0000 (GMT) Received: from tierra2.ng.fadesa.es (tierra2.ng.fadesa.es [195.55.55.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id 8926443D3F for ; Tue, 26 Oct 2004 16:07:17 +0000 (GMT) (envelope-from fandino@ng.fadesa.es) Received: from [195.55.55.163] ([195.55.55.163]) (authenticated bits=0) by tierra2.ng.fadesa.es (8.12.10/8.12.10) with ESMTP id i9QG7G10024013 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 26 Oct 2004 18:07:16 +0200 Message-ID: <417E7633.8090507@ng.fadesa.es> Date: Tue, 26 Oct 2004 18:07:15 +0200 From: fandino User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040616 X-Accept-Language: gl, en, es MIME-Version: 1.0 Cc: freebsd-current@freebsd.org References: <14479.1098695558@critter.freebsd.dk> <417D25E8.6080804@ng.fadesa.es> <200410251928.01536.victor@alf.dyndns.ws> <200410251837.58257.Thomas.Sparrevohn@btinternet.com> <417D3F12.20302@DeepCore.dk> <417D40A1.9030802@ng.fadesa.es> <417D45F1.9090504@freebsd.org> <77F3FD4D-26BE-11D9-9A2F-003065ABFD92@mac.com> <417D58B6.5030509@freebsd.org> <417D65F1.2040809@freebsd.org> In-Reply-To: <417D65F1.2040809@freebsd.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated-Sender: user fandino from 195.55.55.163 X-Virus-Scanned: clamd / ClamAV version 0.75.1, clamav-milter version 0.75c on tierra2 X-Virus-Status: Clean Subject: Re: FreeBSD 5.3b7and poor ata performance X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: fandino@ng.fadesa.es List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 26 Oct 2004 16:07:18 -0000 Scott Long wrote: > RAID-0 yes, RAID-10 no, at least not for software RAID. The machine > winds up having to transfer the same data twice across the PCI bus, > twice through the controller, etc. If the controller is on a simple > PCI-32/33 bus then it will quickly become saturated. When I tested gstripe throughput it was very bad and it makes me think in my PC hitting some limit and my thoughts was some type of limit in the OS, it was my _particular_ case. Of course, you comments about RAID are right, but do you think a RAID0 with two disks is reaching the PCI limit?