From owner-freebsd-questions@FreeBSD.ORG Tue Aug 21 13:50:29 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 F06A916A421 for ; Tue, 21 Aug 2007 13:50:29 +0000 (UTC) (envelope-from hakmi@rogers.com) Received: from smtp102.rog.mail.re2.yahoo.com (smtp102.rog.mail.re2.yahoo.com [206.190.36.80]) by mx1.freebsd.org (Postfix) with SMTP id 9F1C613C4A6 for ; Tue, 21 Aug 2007 13:50:29 +0000 (UTC) (envelope-from hakmi@rogers.com) Received: (qmail 37922 invoked from network); 21 Aug 2007 13:50:28 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=rogers.com; h=Received:X-YMail-OSG:From:To:References:Subject:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Mailer:Thread-Index:X-MimeOLE:In-Reply-To; b=Vpu06msjzKt0EbRValAMZc3Jt0DL8iHxSB1TBo2jFKV6zFpNvAWDAQ8ZoAs6c8Td+W+bfLZlH0LVwgdIF9h4Qw0xoRLmFSXzRXvCMoeIf59vilDKvX0ONMYjkUXGqhy9ZJSIgnKOzSjdCBOXdWUAL9zV743dn8DzT09tnQ+aZGM= ; Received: from unknown (HELO tamouh) (hakmi@rogers.com@74.104.205.212 with login) by smtp102.rog.mail.re2.yahoo.com with SMTP; 21 Aug 2007 13:50:28 -0000 X-YMail-OSG: VWu_XAgVM1lApWBACAkmWg4UJVAIkKCHfEZ2l8vu.td3K8QUyJjT5lL_L0FJQ1RrOQ-- From: "Tamouh H." To: "'Bahman M.'" , References: <6d62f69a0708210419t441042caxe36fcd81339b13e8@mail.gmail.com> Date: Tue, 21 Aug 2007 09:50:39 -0400 Message-ID: <0f6001c7e3fa$4261e6f0$6900a8c0@tamouh> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acfj5T8osxRechrIR2qkjDaGdgd6BwAFNdqw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 In-Reply-To: <6d62f69a0708210419t441042caxe36fcd81339b13e8@mail.gmail.com> Cc: Subject: RE: 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 13:50:30 -0000 >=20 > Hi all, >=20 > During FreeBSD 6.2 installation, the process failed because=20 > of errors like the one below: > READ_DMA UDMA .... ICRC error LBA=3D37505132 >=20 > I managed to install by setting hw.ata.ata_dma=3D0 at boot time=20 > but the same errors occur after installation and at boot time=20 > so I had to put hw.ata.ata_dma=3D0 in loader.conf and now the=20 > system is working. >=20 > I checked my hard disk which a 80GB Western Digital+=20 > thoroughly and there were no errors reported (using fsck in=20 > single user mode). Also I used to install Fedora Linux on=20 > this disk without any problems. >=20 > It looks that disabling DMA caused my disk to work with lower=20 > performance. Am I right? If yes, are there any solutions to=20 > eliminate those READ_DMA errors while DMA is enabled? >=20 > Thanks in advance, > Bahman >=20 > 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 Typically, I've seen the READ_DMA error when a hard drive is going bad = or something wrong with the hardware (power supply is failing). But it = could be as you've described.=20 Tamouh