From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Wed, 15 Aug 2001 23:30:04 +0200 From: Luca Berra Subject: Re: [linux-lvm] Adding a mirror after-the-fact Message-ID: <20010815233003.A2260@colombina.comedia.it> References: <20010814171159.B28266@linux.com> <20010815105623.A29693@sistina.com> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <20010815105623.A29693@sistina.com>; from mauelshagen@sistina.com on Wed, Aug 15, 2001 at 10:56:23AM +0200 Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-lvm@sistina.com On Wed, Aug 15, 2001 at 10:56:23AM +0200, Heinz J . Mauelshagen wrote: > On Tue, Aug 14, 2001 at 05:11:59PM -0400, Jason Tackaberry wrote: > > I know this isn't strictly an LVM question, but ... > > > > Suppose I have a volume group with 1 physical volume, say a 9GB disk. > > Now, after some time, I decide I want to mirror this VG with another 9GB > > disk. What options do I have? AFAICS, the only way to do this would be > > to start from scratch? This is a pretty simple and presumably common > > thing to want to do, so I hope I'm wrong. :) > > Yes, you are (with 2.4 kernels) ;-) > > You could either mirror the whole disk using MD *without* persistent superblocks > raid superblock is at end of disk, so you could also create an lv with only the last PE of the PV and NEVER USE it L. -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \