From owner-freebsd-questions@FreeBSD.ORG Tue Aug 21 11:20:01 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 54FC616A417 for ; Tue, 21 Aug 2007 11:20:01 +0000 (UTC) (envelope-from b.movaqar@gmail.com) Received: from py-out-1112.google.com (py-out-1112.google.com [64.233.166.181]) by mx1.freebsd.org (Postfix) with ESMTP id F270D13C45B for ; Tue, 21 Aug 2007 11:20:00 +0000 (UTC) (envelope-from b.movaqar@gmail.com) Received: by py-out-1112.google.com with SMTP id u77so2632647pyb for ; Tue, 21 Aug 2007 04:20:00 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=dp4Xd+YCpADY5L3olAhqbBTf6wjc4TirqlBgAfrj6zil9y10pZrkBkS/kiQ7u3TPzvAd3AILSHB6VgIS1cy6N41teP+G6QKs3ViEoMsLBcchIZ4FjqFRm7SMYCM6z8RiOsUAanWJDBWyKOz0tUYWuLle61i9ZD6GuvIA4uiLv/s= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=ROnXpSVvMABmmYBaE7ItMu6z8sa0WOVeTeZtmA9ksjyjgc1qJTA7KOBv+5L7xbe7D+QJwfm1b3dqMVpuU0jsVznVmoZpYXsO0YJQbz3D31aL6eiQs8kK3Nwgfq5193wlUSy5ZM+vpJvfNsTlIAv51Q2/hkDx8kVpIecdHxd6v9k= Received: by 10.114.152.17 with SMTP id z17mr156425wad.1187695199219; Tue, 21 Aug 2007 04:19:59 -0700 (PDT) Received: by 10.114.132.13 with HTTP; Tue, 21 Aug 2007 04:19:59 -0700 (PDT) Message-ID: <6d62f69a0708210419t441042caxe36fcd81339b13e8@mail.gmail.com> Date: Tue, 21 Aug 2007 14:49:59 +0330 From: "Bahman M." To: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Subject: READ_DMA Error 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, 21 Aug 2007 11:20:01 -0000 Hi all, During FreeBSD 6.2 installation, the process failed because of errors like the one below: READ_DMA UDMA .... ICRC error LBA=37505132 I managed to install by setting hw.ata.ata_dma=0 at boot time but the same errors occur after installation and at boot time so I had to put hw.ata.ata_dma=0 in loader.conf and now the system is working. I checked my hard disk which a 80GB Western Digital+ thoroughly and there were no errors reported (using fsck in single user mode). Also I used to install Fedora Linux on this disk without any problems. It looks that disabling DMA caused my disk to work with lower performance. Am I right? If yes, are there any solutions to eliminate those READ_DMA errors while DMA is enabled? Thanks in advance, Bahman PS: Motherboard: ASUS A7V8X-X CPU: Athlon XP 2500 at 1833MHz $ uname -ai FreeBSD attila 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Jan 12 10:40:27 UTC 2007 root@dessler.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 GENERIC