From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1QHaBO-0007NX-A2 for mharc-grub-devel@gnu.org; Wed, 04 May 2011 07:23:54 -0400 Received: from eggs.gnu.org ([140.186.70.92]:42012) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHaBE-00078f-V0 for grub-devel@gnu.org; Wed, 04 May 2011 07:23:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QHaBD-0008Gy-N0 for grub-devel@gnu.org; Wed, 04 May 2011 07:23:44 -0400 Received: from fmmailgate03.web.de ([217.72.192.234]:53629) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QHaBD-0008Gi-Ec for grub-devel@gnu.org; Wed, 04 May 2011 07:23:43 -0400 Received: from smtp01.web.de ( [172.20.0.243]) by fmmailgate03.web.de (Postfix) with ESMTP id 43C6018DFDFBB for ; Wed, 4 May 2011 13:23:41 +0200 (CEST) Received: from [78.43.204.177] (helo=frosties.localnet) by smtp01.web.de with asmtp (TLSv1:AES256-SHA:256) (WEB.DE 4.110 #2) id 1QHaBB-0002Jq-00 for grub-devel@gnu.org; Wed, 04 May 2011 13:23:41 +0200 Received: from mrvn by frosties.localnet with local (Exim 4.72) (envelope-from ) id 1QHaBA-00058r-Qg for grub-devel@gnu.org; Wed, 04 May 2011 13:23:40 +0200 From: Goswin von Brederlow To: The development of GNU GRUB Subject: Re: Raid5 regression References: <4DC0124A.7010508@cfl.rr.com> <4DC067F1.4060901@cfl.rr.com> Date: Wed, 04 May 2011 13:23:40 +0200 In-Reply-To: <4DC067F1.4060901@cfl.rr.com> (Phillip Susi's message of "Tue, 03 May 2011 16:39:13 -0400") Message-ID: <871v0ebtfn.fsf@frosties.localnet> User-Agent: Gnus/5.110009 (No Gnus v0.9) XEmacs/21.4.22 (linux, no MULE) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: goswin-v-b@web.de X-Sender: goswin-v-b@web.de X-Provags-ID: V01U2FsdGVkX19pR1Ij7n9+J/zXU5idb7Hh11uM0kuaYGQLOZYg VeQBU3rKQ+Rfh0S1hzfon1VUR+kfq/WbR5IricjtfZ1tG+Bw2h 8Q+AXWXVM= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4-2.6 X-Received-From: 217.72.192.234 X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: The development of GNU GRUB List-Id: The development of GNU GRUB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 May 2011 11:23:53 -0000 Phillip Susi writes: > After enabling raid debug output and then loading mdraid09.mod, I can > see that it is scanning and detecting the superblock on both (hdx) and > (hdx,msdos1). > > On 5/3/2011 10:33 AM, Phillip Susi wrote: >> After upgrading an Ubuntu server from Maverick to Natty ( grub2 version >> 1.99-rc1-13ubuntu3 ) the system no longer will boot. Grub complains >> about the raid5 array: >> >> error: Found two disks with the index 0 for RAID md0 >> error: Found two disks with the index 1 for RAID md0 >> error: Found two disks with the index 2 for RAID md0 >> error: Superfluous RAID member (4 found) >> error: Unknown filesystem >> >> This is a 4 disk raid5 array that mdadm still recognizes and looks fine, >> with each disk having IDs 0 through 3 respectively. Despite the fact >> that it complains about the raid, it still shows the LVM logical volumes >> in the output of ls. The array is the sole LVM PV. >> >> Bug filed at https://launchpad.net/bugs/776422. Any hints on how to >> proceed with debugging this? Is there a way to check what modules are >> built into the core image from the rescue shell? That is a problem mdadm has (had?) too. The problem arises when the alignment of the partition and its size causes the metadata of the partition to be also valid for the disk (as in the partition ends exactly at the end of the disk). One of the reasons not to use metadata at the end of the disk. MfG Goswin