From owner-freebsd-stable@FreeBSD.ORG  Fri Jul 15 15:41:30 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 42BBE16A41C
	for <freebsd-stable@freebsd.org>; Fri, 15 Jul 2005 15:41:30 +0000 (GMT)
	(envelope-from nakal@nurfuerspam.de)
Received: from mail.gmx.net (mail.gmx.net [213.165.64.20])
	by mx1.FreeBSD.org (Postfix) with SMTP id 736E243D45
	for <freebsd-stable@freebsd.org>; Fri, 15 Jul 2005 15:41:29 +0000 (GMT)
	(envelope-from nakal@nurfuerspam.de)
Received: (qmail invoked by alias); 15 Jul 2005 15:41:27 -0000
Received: from p5090DCED.dip.t-dialin.net (EHLO klotz.local) [80.144.220.237]
	by mail.gmx.net (mp031) with SMTP; 15 Jul 2005 17:41:27 +0200
X-Authenticated: #989277
Received: from [192.168.0.2] (booky.local [192.168.0.2])
	by klotz.local (8.13.3/8.13.3) with ESMTP id j6FFf8ED002364
	for <freebsd-stable@freebsd.org>; Fri, 15 Jul 2005 17:41:10 +0200 (CEST)
	(envelope-from nakal@nurfuerspam.de)
Message-ID: <42D7D91B.3090701@nurfuerspam.de>
Date: Fri, 15 Jul 2005 17:41:15 +0200
From: Martin <nakal@nurfuerspam.de>
User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050404)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: freebsd-stable@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Y-GMX-Trusted: 0
Subject: Read-only medium/device detection
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 15 Jul 2005 15:41:30 -0000


Hi,

when I mount a device (or medium) which is read-only without
the -r option, I get lots of troubles when shutting down later.
Syncer does not write all vnodes/blocks to disk. This happened
to me with a write protected floppy disk (-t msdos) and a
CD-R (-t ufs).

It seems to me that read-only state of a file system is being
initially setup according to the type of the file system.
Wouldn't it be more appropriate to detect the medium/device
capabilities to setup it read-only automatically if needed?

Martin