From owner-freebsd-arch@FreeBSD.ORG  Mon Sep 13 19:12:34 2004
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
Delivered-To: freebsd-arch@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 67D9916A4CE
	for <freebsd-arch@freebsd.org>; Mon, 13 Sep 2004 19:12:34 +0000 (GMT)
Received: from athena.softcardsystems.com (mail.softcardsystems.com
	[12.34.136.114])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 232CF43D49
	for <freebsd-arch@freebsd.org>; Mon, 13 Sep 2004 19:12:34 +0000 (GMT)
	(envelope-from sah@softcardsystems.com)
Received: from athena (athena [12.34.136.114])i8DKCHE8008355;
	Mon, 13 Sep 2004 15:12:17 -0500
Date: Mon, 13 Sep 2004 15:12:17 -0500 (EST)
From: Sam <sah@softcardsystems.com>
X-X-Sender: sah@athena
To: Poul-Henning Kamp <phk@phk.freebsd.dk>
In-Reply-To: <82341.1095101771@critter.freebsd.dk>
Message-ID: <Pine.LNX.4.60.0409131505220.6275@athena>
References: <82341.1095101771@critter.freebsd.dk>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
cc: freebsd-arch@freebsd.org
Subject: Re: 4.x device failure? 
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussion related to FreeBSD architecture
	<freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Sep 2004 19:12:34 -0000

Ah.  Well that answers it.  I'll fail unloading of the
module if devices are open.

This leads to a curiosity as to how the RAID
failover modules work at all.  I guess if you abstract
the real disk(s) under a logical disk you can change
the bottom layer without affecting the top.  I'll have
to look at that code a little closer.

Thanks -

Sam

On Mon, 13 Sep 2004, Poul-Henning Kamp wrote:

> In message <Pine.LNX.4.60.0409131202270.6275@athena>, Sam writes:
>>
>
>> Surely there's a way to pull a disk out from under
>> those that have it open without a panic?  Opinions?
>
> No, we're not quite there yet.  I/O errors from disk devices very
> often leads to filesystem or buffer cache panics.  We're working
> on it.
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk@FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
> _______________________________________________
> freebsd-arch@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-arch
> To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org"
>