From owner-freebsd-questions@FreeBSD.ORG Thu Aug 20 22:42:09 2009 Return-Path: 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 090611065672 for ; Thu, 20 Aug 2009 22:42:09 +0000 (UTC) (envelope-from mel.flynn+fbsd.questions@mailing.thruhere.net) Received: from mailhub.rachie.is-a-geek.net (rachie.is-a-geek.net [66.230.99.27]) by mx1.freebsd.org (Postfix) with ESMTP id CB2BE8FC57 for ; Thu, 20 Aug 2009 22:42:08 +0000 (UTC) Received: from smoochies.rachie.is-a-geek.net (mailhub.rachie.is-a-geek.net [192.168.2.11]) by mailhub.rachie.is-a-geek.net (Postfix) with ESMTP id C9C277E853; Thu, 20 Aug 2009 14:42:07 -0800 (AKDT) From: Mel Flynn To: freebsd-questions@freebsd.org Date: Thu, 20 Aug 2009 14:42:05 -0800 User-Agent: KMail/1.11.4 (FreeBSD/8.0-BETA2; KDE/4.2.4; i386; ; ) References: <00B06063-9872-4ACE-8767-1221C22E33EE@silvertree.org> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200908201442.06321.mel.flynn+fbsd.questions@mailing.thruhere.net> Cc: Tim Judd , Scott Schappell Subject: Re: Remounting a drive as read/write crashes the system and no dmesg.boot X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Aug 2009 22:42:09 -0000 On Tuesday 18 August 2009 12:11:10 Tim Judd wrote: > On 8/18/09, Scott Schappell wrote: > > I have a drive (/dev/ad2s1d) mounted to /backup that I want to be read > > only until the backup scripts run and then it will be read/write. If > > I set /etc/fstab to: > > > > /dev/ad2s1d /backup ufs ro > > 0 0 > > On my CF-based devices (firewalls.. nagios boxes, etc), I run: > > mount -uw / > to update the mount (not mount again) the filesystem. If you're > trying to mount again, I could understand why the box panics. I don't. It's perfectly valid to mount a device multiple times and on the same node even. Certainly unmounting then remounting should not panic the system. If you keep getting this panic, please try and obtain a crash dump, though I suspect this to be driver or hardware related as I can't imagine such a bug has slipped into vfs/ufs. -- Mel