From owner-freebsd-questions@FreeBSD.ORG Tue Aug 9 22:23:57 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9550F16A429; Tue, 9 Aug 2005 22:23:56 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from pi.codefab.com (pi.codefab.com [199.103.21.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4369E43FCF; Tue, 9 Aug 2005 19:14:41 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from localhost (localhost [127.0.0.1]) by pi.codefab.com (Postfix) with ESMTP id 5AF895D08; Tue, 9 Aug 2005 15:14:40 -0400 (EDT) Received: from pi.codefab.com ([127.0.0.1]) by localhost (pi.codefab.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 23243-07; Tue, 9 Aug 2005 15:14:38 -0400 (EDT) Received: from [192.168.1.3] (pool-68-161-79-217.ny325.east.verizon.net [68.161.79.217]) by pi.codefab.com (Postfix) with ESMTP id 3E21A5D28; Tue, 9 Aug 2005 15:14:38 -0400 (EDT) Message-ID: <42F9009E.3030601@mac.com> Date: Tue, 09 Aug 2005 15:14:38 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.11) Gecko/20050801 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "O. Hartmann" References: <42F7F7E8.1020507@mail.uni-mainz.de> In-Reply-To: <42F7F7E8.1020507@mail.uni-mainz.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: amavisd-new at codefab.com Cc: freebsd-stable@freebsd.org, freebsd-questions@freebsd.org Subject: Re: ad10: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=11441599 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, 09 Aug 2005 22:23:57 -0000 O. Hartmann wrote: [ ... ] > One of my SATA disks, the SAMSUNG SP2004C seems to show errors during > operation (and also showd under 5.4-RELEASE-p3). > Sometimes I get this error: > ad10: WARNING - READ_DMA UDMA ICRC error (retrying request) LBA=11441599 > while the machine still keeps working. > Other days the box crashes completely. > > Is this a operating system bug or is this message an evidence of > defective hardware? Back up any data you care about now. Use the smartmontools port or hunt down a utility from Samsung which'll do a surface test (read only, nondestructive). You can also run a "dd if=/dev/ad10 of=/dev/null bs=8192" to do a full read test under FreeBSD, and see how many CRC errors show up. -- -Chuck