From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id k25Egi105097 for ; Sun, 5 Mar 2006 09:42:44 -0500 Received: from mail.volved.com (c-71-192-139-98.hsd1.ma.comcast.net [71.192.139.98]) by mx3.redhat.com (8.13.1/8.13.1) with ESMTP id k25EgcdQ030561 for ; Sun, 5 Mar 2006 09:42:38 -0500 Received: from localhost (localhost.localdomain [127.0.0.1]) by mail.volved.com (Postfix) with ESMTP id 1F0671B8D for ; Sun, 5 Mar 2006 08:51:58 -0500 (EST) Received: from mail.volved.com ([127.0.0.1]) by localhost (monolith [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 20605-06 for ; Sun, 5 Mar 2006 08:51:50 -0500 (EST) Received: from [192.168.0.210] (unknown [192.168.0.210]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.volved.com (Postfix) with ESMTP id A5FA41B8C for ; Sun, 5 Mar 2006 08:51:50 -0500 (EST) Message-ID: <440AECFD.5070305@volved.com> Date: Sun, 05 Mar 2006 08:51:57 -0500 From: Barnaby Claydon MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [linux-lvm] New disk; "Couldn't find uuid" after successful pvcreate&vgextend 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" To: linux-lvm@redhat.com Hi all, I've been successfully running LVM2 (2.01.04) on Debian Sarge (2.6.8-2-686) for months. As I've done many times before, I added a new disk yesterday. I successfully ran the following, both without error: pvcreate -v /dev/hdc and vgextend -v mono_media /dev/hdc As standard practice to make sure everything was ok, I then ran: vgscan -v At this point I got several references to "Couldn't find uuid..." repeated with the same uuid several times. At this point it seemed logical to back-out my changes, so I tried to run the following: vgreduce -v mono_media /dev/hdc Unfortunately this gave the same "Couldn't find uuid..." errors as 'vgscan'. As it seemed somewhat logical, I tried running the same 'pvcreate' command, again without error: pvcreate -v /dev/hdc After 'pvcreate' had finished, I was THEN able to run 'vgreduce' and restore my 'mono_media' VG to working order. At this point I was a bit baffled, running 'lvmdiskscan' after the initial 'pvcreate' shows the disk as present, but if I reboot after just that first 'pvcreate' step and run 'lvmdisksacn' after the reboot, /dev/hdc isn't shown. To rule-out a hardware problem I successfully ran 'mkfs.ext3 /dev/hdc' and was able to mount and navigate the volume without errors. Last night I also left 'badblocks -svw /dev/hdc' running which is almost complete and hasn't found any errors yet. I will reply with full command output once 'badblocks' has finished, but I hope this brief synopsis makes sense. Thanks everyone! -Barnaby