From owner-freebsd-questions@FreeBSD.ORG  Mon Sep 10 23:00:18 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
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 DE88F16A4C5
	for <freebsd-questions@freebsd.org>;
	Mon, 10 Sep 2007 23:00:18 +0000 (UTC)
	(envelope-from richard@inf.ed.ac.uk)
Received: from nutty.inf.ed.ac.uk (nutty.inf.ed.ac.uk [129.215.216.3])
	by mx1.freebsd.org (Postfix) with ESMTP id 89F7113C461
	for <freebsd-questions@freebsd.org>;
	Mon, 10 Sep 2007 23:00:18 +0000 (UTC)
	(envelope-from richard@inf.ed.ac.uk)
Received: from macpro.inf.ed.ac.uk (macpro.inf.ed.ac.uk [129.215.164.231])
	by nutty.inf.ed.ac.uk (8.13.8/8.13.8) with ESMTP id l8AN0FeK015356;
	Tue, 11 Sep 2007 00:00:15 +0100
Received: by macpro.inf.ed.ac.uk (Postfix, from userid 26013)
	id 9E85C25C037; Tue, 11 Sep 2007 00:00:08 +0100 (BST)
From: Richard Tobin <richard@inf.ed.ac.uk>
To: "Ted Mittelstaedt" <tedm@toybox.placo.com>,
	"Lars Eighner" <luvbeastie@larseighner.com>
In-Reply-To: Ted Mittelstaedt's message of Sun, 9 Sep 2007 23:02:34 -0700
Organization: just say no
X-Mailer: Ream 5.1.51-richard-mac
Message-Id: <20070910230008.9E85C25C037@macpro.inf.ed.ac.uk>
Date: Tue, 11 Sep 2007 00:00:08 +0100 (BST)
Cc: Richard Tobin <richard@inf.ed.ac.uk>, freebsd-questions@freebsd.org
Subject: RE: Disk errors when copying
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
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: Mon, 10 Sep 2007 23:00:19 -0000

> > >> ad10: WARNING - READ_DMA48 UDMA ICRC error (retrying request)
> > >> LBA=435128800
> > >> ad10: FAILURE - READ_DMA48 status=51<READY,DSC,ERROR>
> > >> error=10<NID_NOT_FOUND> LBA=435128800
> > >> g_vfs_done():ad10s2g[READ(offset=175562145792, length=131072)]error = 5

> One of the rules of thumb when you have hardware problems with a new
> system (I'm assuming of course that these UDMA errors have been
> happening since the system was built)

In my case it happened once and did not recur.  But looking at the SMART
log on the disk it appears that it might have happened before without
my noticing.  I was copying the disk before moving it to a different
machine, so I probably won't be able to test it further.

I'm sending a PR.

-- Richard