From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 19 May 2001 12:43:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 19 May 2001 12:43:47 -0400 Received: from nat-pool-meridian.redhat.com ([199.183.24.200]:510 "EHLO devserv.devel.redhat.com") by vger.kernel.org with ESMTP id ; Sat, 19 May 2001 12:43:34 -0400 Date: Sat, 19 May 2001 17:43:07 +0100 From: "Stephen C. Tweedie" To: Chris Wedgwood Cc: "Stephen C. Tweedie" , Michael Meissner , Miles Lane , Linux Kernel Subject: Re: LANANA: To Pending Device Number Registrants Message-ID: <20010519174307.W8080@redhat.com> In-Reply-To: <3B0261EC.23BE5EF0@idb.hist.no> <031ypp1oi2.fsf@colargol.tihlde.org> <3B028063.67442F62@idb.hist.no> <990030651.932.3.camel@agate> <20010516121815.B16609@munchkin.spectacle-pond.org> <20010518151750.A10515@redhat.com> <20010519172932.C4434@metastasis.f00f.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20010519172932.C4434@metastasis.f00f.org>; from cw@f00f.org on Sat, May 19, 2001 at 05:29:32PM +1200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Sat, May 19, 2001 at 05:29:32PM +1200, Chris Wedgwood wrote: > > Or you can fall back to mounting by UUID, which is globally > unique and still avoids referencing physical location. You also > don't need to manually set LABELs for UUID to work: all e2fsprogs > over the past couple of years have set UUID on partitions, and > e2fsck will create a new UUID if it sees an old filesystem that > doesn't already have one. > > Other filesystems such as reiserfs at present don't have such a > thing. I brought this a while ago and in theory it's not too hard, we > just need to get Hans to officially designate part of the SB or > whatever for the UUID. There are other ways to deal with it: both md and (I think, in newer releases) LVM can pick up their logical config from scanning physical volumes for IDs, and so present a consistent logical device namespace despite physical devices moving around. --Stephen