From: Jeremy Sanders Subject: Re: fsck.ext4: Group descriptors look bad... trying backup blocks... Date: Fri, 17 Apr 2009 12:26:28 +0100 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit To: linux-ext4@vger.kernel.org Return-path: Received: from main.gmane.org ([80.91.229.2]:43421 "EHLO ciao.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759937AbZDQL0p (ORCPT ); Fri, 17 Apr 2009 07:26:45 -0400 Received: from list by ciao.gmane.org with local (Exim 4.43) id 1LumDP-0007WG-MC for linux-ext4@vger.kernel.org; Fri, 17 Apr 2009 11:26:39 +0000 Received: from xpc17.ast.cam.ac.uk ([131.111.69.96]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 17 Apr 2009 11:26:39 +0000 Received: from jss by xpc17.ast.cam.ac.uk with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 17 Apr 2009 11:26:39 +0000 Sender: linux-ext4-owner@vger.kernel.org List-ID: Some more information about the device: root@xback2 ~]# dumpe2fs /dev/md0| head -100 dumpe2fs 1.41.4 (27-Jan-2009) Filesystem volume name: Last mounted on: Filesystem UUID: 508aee62-79af-4b4c-95a6-222b3868834c Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 549314560 Block count: 2197239840 Reserved block count: 0 Free blocks: 1508301443 Free inodes: 545311753 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 500 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stride: 8 RAID stripe width: 72 Flex block group size: 16 Filesystem created: Fri Apr 10 17:13:08 2009 Last mount time: Mon Apr 13 11:00:22 2009 Last write time: Fri Apr 17 11:53:05 2009 Mount count: 1 Maximum mount count: -1 Last checked: Fri Apr 10 17:13:08 2009 Check interval: 0 () Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: 9c9b9fd6-5af2-4ee0-bceb-25827cb008f9 Journal backup: inode blocks Journal size: 128M Group 0: (Blocks 0-32767) [ITABLE_ZEROED] Checksum 0xd3b2, unused inodes 4032 Primary superblock at 0, Group descriptors at 1-524 Reserved GDT blocks at 525-1024 Block bitmap at 1025 (+1025), Inode bitmap at 1041 (+1041) Inode table at 1057-1568 (+1057) 856 free blocks, 4032 free inodes, 268 directories, 4032 unused inodes Group 1: (Blocks 32768-65535) [INODE_UNINIT, ITABLE_ZEROED] Checksum 0xc586, unused inodes 8192 Backup superblock at 32768, Group descriptors at 32769-33292 Reserved GDT blocks at 33293-33792 Block bitmap at 1026 (+4294935554), Inode bitmap at 1042 (+4294935570) Inode table at 1569-2080 (+4294936097) 939 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes Group 2: (Blocks 65536-98303) [INODE_UNINIT, ITABLE_ZEROED] ...