From owner-freebsd-hackers@FreeBSD.ORG  Wed Oct 25 05:37:29 2006
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 3086216A407
	for <freebsd-hackers@freebsd.org>; Wed, 25 Oct 2006 05:37:29 +0000 (UTC)
	(envelope-from perryh@pluto.rain.com)
Received: from agora.rdrop.com (agora.rdrop.com [199.26.172.34])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 8466443D6B
	for <freebsd-hackers@freebsd.org>; Wed, 25 Oct 2006 05:37:26 +0000 (GMT)
	(envelope-from perryh@pluto.rain.com)
Received: from agora.rdrop.com (66@localhost [127.0.0.1])
	by agora.rdrop.com (8.13.1/8.12.7) with ESMTP id k9P5ZUtn002001
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT);
	Tue, 24 Oct 2006 22:35:31 -0700 (PDT)
	(envelope-from perryh@pluto.rain.com)
Received: (from uucp@localhost)
	by agora.rdrop.com (8.13.1/8.12.9/Submit) with UUCP id k9P5ZUjZ002000; 
	Tue, 24 Oct 2006 22:35:30 -0700 (PDT)
Received: from fbsd61 ([192.168.200.61]) by pluto.rain.com
	(4.1/SMI-4.1-pluto-M2060407) id AA13268; Tue, 24 Oct 06 22:26:59 PDT
Date: Tue, 24 Oct 2006 22:27:48 -0700
From: perryh@pluto.rain.com
To: spork@fasttrackmonkey.com
Message-Id: <453ef5d4.JWeFkgfXTFibI+uh%perryh@pluto.rain.com>
References: <Pine.OSX.4.61.0610241900480.889@white.nat.fasttrackmonkey.com>
In-Reply-To: <Pine.OSX.4.61.0610241900480.889@white.nat.fasttrackmonkey.com>
User-Agent: nail 11.25 7/29/05
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
Subject: Re: Panic caused by bad memory?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 25 Oct 2006 05:37:29 -0000

> I can't get a kernel dump since it fails like this each time:
>
> dumping to dev #da/0x20001, offset 2097152
> dump 1024 1023 1022 1021 Aborting dump due to I/O error.
> status == 0xb, scsi status == 0x0
> failed, reason: i/o error

Bad memory seems unlikely to cause an I/O error trying to write the
dump to the swap partition.  I'd guess a dicey drive -- and bad
swap space could also account for the original crash.  You might
be able to get a backup by booting single user, provided nothing
activates the (presumably bad) swap partition.