From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270815AbTGPNow (ORCPT ); Wed, 16 Jul 2003 09:44:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270824AbTGPNow (ORCPT ); Wed, 16 Jul 2003 09:44:52 -0400 Received: from e34.co.us.ibm.com ([32.97.110.132]:17082 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S270815AbTGPNov (ORCPT ); Wed, 16 Jul 2003 09:44:51 -0400 From: Kevin Corry To: "Dimitry V. Ketov" , "Lars Marowsky-Bree" , Subject: Re: Partitioned loop device.. Date: Wed, 16 Jul 2003 08:51:18 -0500 User-Agent: KMail/1.5 References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200307160851.18967.kevcorry@us.ibm.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 16 July 2003 03:59, Dimitry V. Ketov wrote: > > There is no difference. What makes /dev/loop1a worse than > > /dev/hda1? It's just block devices, that's it. > > Yes, it is. But I meant its still impossible to use legacy fdisk to > create that DM mapped partitions (or am I wrong?) The program fdisk does not know about Device-Mapper. It only reads and writes DOS partition tables, and leaves it up to the kernel block-layer to provide the corresponding block devices. Other tools are available that use the same partitioning format and work with Device-Mapper. > > I have hopes that the entire partitioning code etc will be > > ripped out in 2.7 in favour of full userspace discovery + DM, > > and that MD will hit the same fate... > > MD - did you mean metadisks (software raids?) Yes. Software RAID devices are currently handled by the MD driver, but much of that functionality could be ported to Device-Mapper. RAID-linear and RAID-0 can already be supported in DM, and the latest DM release from Sistina has a module to support RAID-1. So all that's left is to port the RAID-5 code to a DM module, and modify the user-space tools. -- Kevin Corry kevcorry@us.ibm.com http://evms.sourceforge.net/