From owner-freebsd-fs@FreeBSD.ORG Wed Mar 23 06:06:13 2011 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 03AEA1065686 for ; Wed, 23 Mar 2011 06:06:13 +0000 (UTC) (envelope-from lastewart@swin.edu.au) Received: from lauren.room52.net (lauren.room52.net [210.50.193.198]) by mx1.freebsd.org (Postfix) with ESMTP id BBC388FC17 for ; Wed, 23 Mar 2011 06:06:12 +0000 (UTC) Received: from lawrence1.loshell.room52.net (ppp59-167-184-191.static.internode.on.net [59.167.184.191]) by lauren.room52.net (Postfix) with ESMTPSA id 5CAAD7E8D6 for ; Wed, 23 Mar 2011 16:48:21 +1100 (EST) Message-ID: <4D8989A5.1020203@swin.edu.au> Date: Wed, 23 Mar 2011 16:48:21 +1100 From: Lawrence Stewart User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-AU; rv:1.9.2.15) Gecko/20110308 Lightning/1.0b2 Thunderbird/3.1.9 MIME-Version: 1.0 To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.0 required=5.0 tests=UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on lauren.room52.net Subject: mount -o union doesn't allow changes to sub directories? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Mar 2011 06:06:13 -0000 Hi again, If I run something like: mount -o union /dev/md0 /etc where md0 is a memory backed fs device, and /etc is fully populated but mounted RO off a CD, I can touch a new file in /etc, but can't in any subdir of etc (fails with "Read-only filesystem" reported). As far as I can tell this is a bug, but wanted to check if I'm misunderstanding how the "-o union" mount option is supposed to work. Cheers, Lawrence