From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S271044AbTGQCZb (ORCPT ); Wed, 16 Jul 2003 22:25:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S271333AbTGQCZb (ORCPT ); Wed, 16 Jul 2003 22:25:31 -0400 Received: from host.atlantavirtual.com ([209.239.35.47]:19135 "EHLO host.atlantavirtual.com") by vger.kernel.org with ESMTP id S271044AbTGQCZa (ORCPT ); Wed, 16 Jul 2003 22:25:30 -0400 Subject: Re: Partitioned loop device.. From: kernel Reply-To: kernel@crazytrain.com To: Josh Litherland Cc: Kevin Corry , linux-kernel@vger.kernel.org In-Reply-To: <20030715155317.317B461FDE@sade.emperorlinux.com> References: <20030715155317.317B461FDE@sade.emperorlinux.com> Content-Type: text/plain Organization: Message-Id: <1058409892.4211.29.camel@thong> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.3 Date: 16 Jul 2003 22:44:52 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Josh coming in late on this thread, hope I'm not showing my better half. You may want to look at the work NASA has done on their enhanced loopback driver; ftp://ftp.hq.nasa.gov/pub/ig/ccd/enhanced_loopback/ Allows you to take a physical image of a device (such as one created by 'dd') and mount the logical volumes contained within, even if starting FS code is beyond the 2GB puke limit. It will mount the volumes 'ro' for you. However, be careful if you need true 'ro' on the reiserfs and ext3 filesystems. So far in our testing mounting these 'ro' via loop device files (/dev/loop0, etc.) *fails*. The journal count *is* incremented on the 'ro' filesystem and writes *can* still occur. cheers! farmerdude On Tue, 2003-07-15 at 11:53, Josh Litherland wrote: > In article <200307151001.44218.kevcorry@us.ibm.com> you wrote: > > > so there's not much of a reason to add partitioning support to the loop > > driver itself. > > Working with sector images of hard drives? I use Linux for data > recovery jobs and it would be very helpful to me to be able to look at > DOS partitions inside a loopback device. As it is I must chunk it up > into seperate files by hand.