From: Ron Johnson Subject: Re: EXT4-fs: group descriptors corrupted! Date: Wed, 25 Feb 2009 15:47:15 -0600 Message-ID: <49A5BC63.9030104@cox.net> References: <49A5AC83.1020009@cox.net> <20090225213046.GF1363@mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit To: Linux-Ext4 Return-path: Received: from eastrmmtai112.cox.net ([68.230.240.31]:61778 "EHLO eastrmmtai112.cox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751045AbZBYWwI (ORCPT ); Wed, 25 Feb 2009 17:52:08 -0500 Received: from eastrmimpo03.cox.net ([68.1.16.126]) by eastrmmtao105.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20090225214716.CPGG4139.eastrmmtao105.cox.net@eastrmimpo03.cox.net> for ; Wed, 25 Feb 2009 16:47:16 -0500 Received: from [192.168.1.10] (haggis.homelan [192.168.1.10]) by haggis.homelan (Postfix) with ESMTP id 73BB787CF9 for ; Wed, 25 Feb 2009 15:47:15 -0600 (CST) In-Reply-To: <20090225213046.GF1363@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: On 02/25/2009 03:30 PM, Theodore Tso wrote: > On Wed, Feb 25, 2009 at 02:39:31PM -0600, Ron Johnson wrote: >> These are the relevant Debian Sid package versions: >> e2fsprogs 1.41.3-1 >> linux-source-2.6.28 2.6.28-2~snapshot.12850 >> >> Since I built the fs with extents enabled, I am hesitant to run fsck on >> it because I've read that it doesn't yet support extents. >> >> As you can see from the dmesg snippets, one of my ext4 file systems >> mounted perfectly. The one that didn't is an lvm2 "array", which seems >> to be consistent. > > E2fsck 1.41.3 does actually have extent support, but let's not be too > hasty to run e2fsck just yet. > > Can you send me the output of "dumpe2fs -o superblock=32768 > /dev/main_huge_vg/main_huge_lv" and see how it compares to the > dumpe2fs of your primary superblock? # dumpe2fs -f -o superblock=32768 /dev/main_huge_vg/main_huge_lv | head -n800 > main_huge_lv.dump.sb32768.txt dumpe2fs 1.41.3 (12-Oct-2008) ext2fs_read_bb_inode: Invalid argument http://members.cox.net/ron.l.johnson/main_huge_lv.dump.sb32768.txt > It looks like your block group descriptors were totally scribbled > upon. There system cleanly shut down. (Or, at least, I didn't notice anything obviously wrong.) > How and why it happened, I'm not sure. But before we do > anything else, let's check out the backup descriptors and make sure > they are sane. -- Ron Johnson, Jr. Jefferson LA USA The feeling of disgust at seeing a human female in a Relationship with a chimp male is Homininphobia, and you should be ashamed of yourself.