From owner-freebsd-current@FreeBSD.ORG Mon Oct 25 18:00:32 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 2F10516A4CE for ; Mon, 25 Oct 2004 18:00:32 +0000 (GMT) Received: from spider.deepcore.dk (cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id 81EC743D4C for ; Mon, 25 Oct 2004 18:00:31 +0000 (GMT) (envelope-from sos@DeepCore.dk) Received: from [194.192.25.143] (laptop.deepcore.dk [194.192.25.143]) by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id i9PI0PnS051264; Mon, 25 Oct 2004 20:00:27 +0200 (CEST) (envelope-from sos@DeepCore.dk) Message-ID: <417D3F12.20302@DeepCore.dk> Date: Mon, 25 Oct 2004 19:59:46 +0200 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= User-Agent: Mozilla Thunderbird 0.7.2 (X11/20040802) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Thomas.Sparrevohn@btinternet.com References: <14479.1098695558@critter.freebsd.dk> <417D25E8.6080804@ng.fadesa.es> <200410251928.01536.victor@alf.dyndns.ws> <200410251837.58257.Thomas.Sparrevohn@btinternet.com> In-Reply-To: <200410251837.58257.Thomas.Sparrevohn@btinternet.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-mail-scanned: by DeepCore Virus & Spam killer v1.4 cc: freebsd-current@freebsd.org Subject: Re: FreeBSD 5.3b7and poor ata performance X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Oct 2004 18:00:32 -0000 Thomas Sparrevohn wrote: > On Monday 25 October 2004 18:28, Victor Balada Diaz wrote: >=20 >>On Monday 25 October 2004 18:12, fandino wrote: >> >>>Thanks to the excelent job of Thomas Sparrevohn I get 52MB/s, this is >>>an excerpt of their comments: >>> >>>"Changes the DMA speed to 66 - The Controller is a 100 controller and = the >>>disks are 100 Disks but I think the default for the controller is 66 a= nd >>>hence there are most likely a small initialisation difference between >>>Linux, NetBSD and FreeBSD" >> >>Hi >> >>please can you post how do you solved the problem? >=20 > atacontrol mode DMA4 DMA4 > atacontrol mode DMA4 DMA4 >=20 > The reason is that the motherboard only supports ATA100 on two out of f= our IDE=20 > channels and hence you need to force the two other channels to run at D= MA66=20 How do you come to that conclusion ? There is no such limitation AFAIK. However you can only get a total sum of 133MB/s divided by number of=20 disks (and minus some overhead on older system there is typically=20 110MB/s effective bandwidth).. The real explanation is much more likely that the timing specs are=20 marginal (overclocked ?) for the disks, which causes problems.. --=20 -S=F8ren