From owner-freebsd-current@FreeBSD.ORG  Wed May 21 00:51:35 2003
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 06DCA37B401
	for <freebsd-current@freebsd.org>;
	Wed, 21 May 2003 00:51:35 -0700 (PDT)
Received: from franky.speednet.com.au (franky.speednet.com.au [203.57.65.5])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 97B7843FA3
	for <freebsd-current@freebsd.org>;
	Wed, 21 May 2003 00:51:33 -0700 (PDT)
	(envelope-from andyf@speednet.com.au)
Received: from hewey.af.speednet.com.au (hewey.af.speednet.com.au
	[203.38.96.242])h4L7pVqe049638;	Wed, 21 May 2003 17:51:31 +1000 (EST)
	(envelope-from andyf@speednet.com.au)
Received: from hewey.af.speednet.com.au (hewey.af.speednet.com.au
	[172.22.2.17])h4L7pTYm005515;	Wed, 21 May 2003 17:51:29 +1000 (EST)
	(envelope-from andyf@speednet.com.au)
Date: Wed, 21 May 2003 17:51:28 +1000 (EST)
From: Andy Farkas <andyf@speednet.com.au>
X-X-Sender: andyf@hewey.af.speednet.com.au
To: Bruce Evans <bde@zeta.org.au>
In-Reply-To: <20030521163526.I30051@gamplex.bde.org>
Message-ID: <20030521174255.H93323-100000@hewey.af.speednet.com.au>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: Jun Kuriyama <kuriyama@imgsrc.co.jp>
cc: Current <freebsd-current@freebsd.org>
Subject: Re: panic: mount: lost mount
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 21 May 2003 07:51:35 -0000

On Wed, 21 May 2003, Bruce Evans wrote:
> On Wed, 21 May 2003, Jun Kuriyama wrote:
>
> > With today's current, I've got a panic with bad floppy.
> >
> > fd0: hard error cmd=read fsbn 57 of 56-63 (ST0 44<abnrml,top_head> ST1 20<bad_crc> ST2 20<bad_crc> cyl 1 hd 1 sec 4)
> > panic: mount: lost mount
> > cpuid = 1; lapic.id = 01000000
> > Debugger("panic")
> > Stopped at      Debugger+0x55:  xchgl   %ebx,in_Debugger.0
> > db> trace
> > Debugger(c03eb40e,1000000,c03f085e,ebc05b80,1) at Debugger+0x55
> > panic(c03f085e,ebc05ba4,c03f0812,46a,c896b720) at panic+0x11f
> > vfs_mount(c896b720,c7eafd40,c8a32b80,0,bfbfece0) at vfs_mount+0xa80
> > mount(c896b720,ebc05d10,c0407bf6,3fb,4) at mount+0xb8
> > syscall(2f,2f,2f,80a210f,bfbff6a4) at syscall+0x26e
> > Xint0x80_syscall() at Xint0x80_syscall+0x1d
>
> Unfortunately, this is fairly normal file system behaviour when a critical
> block is unreadable or damaged.  Here vfs detects a problem that it knows
> it cannot handle, and panics.

Is there any way to indicate that this was removable media to vfs? Maybe
it could not panic in this case but rather fail gracefully.

--

 :{ andyf@speednet.com.au

        Andy Farkas
    System Administrator
   Speednet Communications
 http://www.speednet.com.au/