From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id k6IMpuwh010648 for ; Tue, 18 Jul 2006 18:51:56 -0400 Received: from percy.comedia.it (percy.comedia.it [212.97.59.71]) by mx1.redhat.com (8.12.11.20060308/8.12.11) with ESMTP id k6IMpsKZ024640 for ; Tue, 18 Jul 2006 18:51:54 -0400 Date: Wed, 19 Jul 2006 00:51:52 +0200 From: Luca Berra Subject: Re: [linux-lvm] Error setting up a mirrored lv Message-ID: <20060718225144.GA28146@percy.comedia.it> References: <44BD337D.8070005@chaos.ao.net> Mime-Version: 1.0 Content-Disposition: inline In-Reply-To: <44BD337D.8070005@chaos.ao.net> Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" Content-Transfer-Encoding: 7bit To: linux-lvm@redhat.com On Tue, Jul 18, 2006 at 03:16:13PM -0400, Harik A'ttar wrote: >As you noticed, you need a log partition. dm-mirror is a bit smarter >then the basic MD raid1 in that it uses a log disk to keep track of >write completions for synchronization. I've only recently got a kernel Just for fairness, modern md also supports bitmaps either on a different device or inside the md components for this very purpose. L. -- Luca Berra -- bluca@comedia.it Communication Media & Services S.r.l. /"\ \ / ASCII RIBBON CAMPAIGN X AGAINST HTML MAIL / \