From: Andreas Dilger Subject: Re: Call traces on console from a test machine Date: Fri, 14 Nov 2008 03:36:02 -0700 Message-ID: <20081114103602.GU16005@webber.adilger.int> References: <491CC6E3.7070808@hq.newdream.net> <491CDF90.8070802@hq.newdream.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT Cc: linux-ext4@vger.kernel.org To: Kelly Kane Return-path: Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:36366 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751040AbYKNKgF (ORCPT ); Fri, 14 Nov 2008 05:36:05 -0500 Received: from fe-sfbay-09.sun.com ([192.18.43.129]) by sca-es-mail-1.sun.com (8.13.7+Sun/8.12.9) with ESMTP id mAEAa4qT011082 for ; Fri, 14 Nov 2008 02:36:04 -0800 (PST) Received: from conversion-daemon.fe-sfbay-09.sun.com by fe-sfbay-09.sun.com (Sun Java System Messaging Server 6.2-8.04 (built Feb 28 2007)) id <0KAB00H01K1FFK00@fe-sfbay-09.sun.com> (original mail from adilger@sun.com) for linux-ext4@vger.kernel.org; Fri, 14 Nov 2008 02:36:04 -0800 (PST) In-reply-to: <491CDF90.8070802@hq.newdream.net> Content-disposition: inline Sender: linux-ext4-owner@vger.kernel.org List-ID: On Nov 13, 2008 18:16 -0800, Kelly Kane wrote: > In the mean time, fsck.ext4 is not liking our filesystem. > > Group descriptor 353 checksum is invalid. Fix? yes > Pass 2: CheckingEntry 'spice-and-wolf-si-tendra-segunda-temporada' in > > /liamsito1234/cibercomics.com/wp-content/cache/supercache/www.cibercomics.com/2008/10/05 > (2152305) references inode > 2901322 in group 354 where _INODE_UNINIT is set. > Entry 'spice-and-wolf-si-tendra-segunda-temporada' in > > /liamsito1234/cibercomics.com/wp-content/cache/supercache/www.cibercomics.com/2008/10/05 > (2152305) has > deleted/unused inode 2901322. Clear? yes > /dev/sdb1: e2fsck canceled. > e2fsck: aborted > > Same block group each run through, different inode. > > I ran e2image and produced the following file: > > http://ext4dev.dreamhosters.com/watanabe-home-2008-11-13-1712.e2image.bz2 > > Unfortunately I cannot mount the filesystem right now due to: > > EXT4-fs: ext4_check_descriptors: Checksum for group 353 failed > (23397!=52411) > EXT4-fs: group descriptors corrupted! > mount: wrong fs type, bad option, bad superblock on /dev/sdb1, > missing codepage or other error In some cases useful info > is found in syslog - try > dmesg | tail or so > > Is there any hope for recovery of any of this data? You can run "tune2fs -O ^uninit_bg /dev/XXX" to disable the group descriptor checksums (and, unfortunately, the fast fsck benefits), but at least it will allow you to mount the filesystem. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.