From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx2.redhat.com (mx2.redhat.com [10.255.15.25]) by int-mx2.corp.redhat.com (8.13.1/8.13.1) with ESMTP id l1FFO7A2011325 for ; Thu, 15 Feb 2007 10:24:07 -0500 Received: from mail2.syneticon.net (mail.syneticon.net [213.239.212.131]) by mx2.redhat.com (8.13.1/8.13.1) with ESMTP id l1FFO4V4019641 for ; Thu, 15 Feb 2007 10:24:05 -0500 Received: from localhost (localhost [127.0.0.1]) by mail2.syneticon.net (Postfix) with ESMTP id 3857D527A3 for ; Thu, 15 Feb 2007 16:23:59 +0100 (CET) Received: from mail2.syneticon.net ([127.0.0.1]) by localhost (linux [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 17070-15 for ; Thu, 15 Feb 2007 16:23:42 +0100 (CET) Received: from postfix1.syneticon.net (postfix1.syneticon.net [192.168.112.6]) by mail2.syneticon.net (Postfix) with ESMTP for ; Thu, 15 Feb 2007 16:23:42 +0100 (CET) Received: from localhost (filter1.syneticon.net [192.168.113.3]) by postfix1.syneticon.net (Postfix) with ESMTP id 13CEA94AF for ; Thu, 15 Feb 2007 16:23:43 +0100 (CET) Received: from postfix1.syneticon.net ([192.168.113.4]) by localhost (192.168.113.3 [192.168.113.3]) (amavisd-new, port 10025) with ESMTP id qooFxxXL3l2V for ; Thu, 15 Feb 2007 16:23:37 +0100 (CET) Received: from [81.173.141.96] (xdsl-81-173-141-96.netcologne.de [81.173.141.96]) by postfix1.syneticon.net (Postfix) with ESMTP for ; Thu, 15 Feb 2007 16:23:37 +0100 (CET) Message-ID: <45D47AF5.2040106@wpkg.org> Date: Thu, 15 Feb 2007 16:23:33 +0100 From: Tomasz Chmielewski MIME-Version: 1.0 Subject: Re: [linux-lvm] vgdisplay - checksum error - what does it mean? References: <45D448F5.3000301@wpkg.org> In-Reply-To: <45D448F5.3000301@wpkg.org> Content-Transfer-Encoding: 7bit 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: LVM general discussion and development Tomasz Chmielewski schrieb: > Recently, I used "vgdisplay", and noticed that it gives a "checksum error": > > # vgdisplay > /dev/sda2: Checksum error > --- Volume group --- > VG Name LVM2 > System ID > Format lvm2 > Metadata Areas 1 > Metadata Sequence No 49 > VG Access read/write > VG Status resizable > MAX LV 0 > Cur LV 34 > Open LV 34 > Max PV 0 > Cur PV 1 > Act PV 1 > VG Size 743.16 GB > PE Size 4.00 MB > Total PE 190250 > Alloc PE / Size 175807 / 686.75 GB > Free PE / Size 14443 / 56.42 GB > VG UUID yV2ADe-MeJd-dHbd-ExLP-AIu3-OTA2-u46qhl > > > Should I be scared? What does it mean? What should I do about it? I > wouldn't like to loose the data. > > If it helps, my setup looks like that: > > HDD1-sda2-\ > HDD2-sdb2-|__RAID-10--LVM-2 > HDD3-sdc2-| > HDD4-sdd2-/ > > I'm running 2.6.17.8 kernel. Hmmm... isn't it something that tells about the history of that system? # lvmdiskscan | egrep '(sd|md)' /dev/sda2: Checksum error /dev/md0 [ 1.03 GB] /dev/md1 [ 1.03 GB] /dev/sda2 [ 371.58 GB] LVM physical volume /dev/md2 [ 743.16 GB] LVM physical volume /dev/sdb2 [ 371.58 GB] /dev/sdc2 [ 371.58 GB] /dev/sdd2 [ 371.58 GB] /dev/md0 is RAID-1 -> swap /dev/md1 is RAID-1 -> root filesystem /dev/md2 is RAID-10 -> all LVM volumes So this basically means, that LVM was set up on /dev/sda2 some time ago, but it was never removed from there - instead, RAID-10 was set up on that partition? Should I do something to fix the things? What? -- Tomasz Chmielewski http://wpkg.org