From owner-freebsd-questions@FreeBSD.ORG  Fri Jul  1 17:00:45 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 B402116A41C
	for <freebsd-questions@freebsd.org>;
	Fri,  1 Jul 2005 17:00:45 +0000 (GMT)
	(envelope-from dmehler26@woh.rr.com)
Received: from ms-smtp-03-eri0.ohiordc.rr.com
	(ms-smtp-03-smtplb.ohiordc.rr.com [65.24.5.137])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7CD3B43D1D
	for <freebsd-questions@freebsd.org>;
	Fri,  1 Jul 2005 17:00:45 +0000 (GMT)
	(envelope-from dmehler26@woh.rr.com)
Received: from satellite (cpe-65-31-41-46.woh.res.rr.com [65.31.41.46])
	by ms-smtp-03-eri0.ohiordc.rr.com (8.12.10/8.12.7) with SMTP id
	j61H0gYF010405 for <freebsd-questions@freebsd.org>;
	Fri, 1 Jul 2005 13:00:42 -0400 (EDT)
Message-ID: <002b01c57e5e$6a86c550$0200a8c0@satellite>
From: "dave" <dmehler26@woh.rr.com>
To: <freebsd-questions@freebsd.org>
Date: Fri, 1 Jul 2005 13:00:42 -0400
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2800.1437
X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1441
X-Virus-Scanned: Symantec AntiVirus Scan Engine
Subject: DMA read/write errors while copying data, 5.4
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: dave <dmehler26@woh.rr.com>
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 01 Jul 2005 17:00:45 -0000

Hello,
    I was following procedure2 of the gmirror howto located at:
http://people.freebsd.org/~rse/mirror/
and had got to the part where i was copying the data from the first to the
second disk. I did:
dump -L -0 -f- /usr | (cd /mnt/usr; restore -r -v -f-)
which went for a while then hung. Checking the console i saw:

ad1: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=78165359
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567655
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567659
ad1: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=78165359
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567655
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567659
ad1: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=78165359
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567655
ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=7567659

etc. I've done this on another box, a test machine and did not experience
this issue. Might one or more of these drives be going bad?
Thanks.
Dave.