From: Nathaniel W Filardo Subject: Re: ext4 metadata corruption bug? Date: Tue, 29 Apr 2014 11:22:13 -0400 Message-ID: <20140429152213.GF5136@gradx.cs.jhu.edu> References: <20140420163211.GT10985@gradx.cs.jhu.edu> <20140423072311.GD10163@dot.freshdot.net> <20140423143642.GA29925@thunk.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="JSkcQAAxhB1h8DcT" Cc: linux-ext4@vger.kernel.org, admins@acm.jhu.edu To: "Theodore Ts'o" Return-path: Received: from blaze.cs.jhu.edu ([128.220.13.50]:60178 "EHLO blaze.cs.jhu.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751447AbaD2PWW (ORCPT ); Tue, 29 Apr 2014 11:22:22 -0400 Content-Disposition: inline In-Reply-To: <20140423143642.GA29925@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: --JSkcQAAxhB1h8DcT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Apr 23, 2014 at 10:36:42AM -0400, Theodore Ts'o wrote: > OK, with the two of you reporting this problem, can you do me the > following so we can try to seriously dig into this: >[snip] Just got another instance of corruption; this time on the allocation side: [715863.874936] EXT4-fs error (device vdb): ext4_mb_generate_buddy:756: group 50737, 485 clusters in bitmap, 484 in gd; block bitmap corrupt. This time from a different, though still > 8TB filesystem, whose dump information sayeth: Filesystem volume name: Last mounted on: /viceps Filesystem UUID: 5bd1df60-53df-43f9-9785-5a35da485c81 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: user_xattr acl Filesystem state: clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 335544320 Block count: 2684354560 Reserved block count: 134217728 Free blocks: 1767616367 Free inodes: 328163234 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 384 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 4096 Inode blocks per group: 256 RAID stride: 1024 RAID stripe width: 1024 Flex block group size: 16 Filesystem created: Fri Jan 24 18:01:34 2014 Last mount time: Sun Apr 20 14:08:10 2014 Last write time: Tue Apr 29 11:16:22 2014 Mount count: 5 Maximum mount count: -1 Last checked: Wed Apr 9 17:39:32 2014 Check interval: 0 () Lifetime writes: 3574 GB 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: d51561e1-73f7-40c6-bfac-61d8e46a4da4 Journal backup: inode blocks Journal features: journal_incompat_revoke Journal size: 128M Journal length: 32768 Journal sequence: 0x000ab65b Journal start: 0 Cheers, --nwf; --JSkcQAAxhB1h8DcT Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlNfw6UACgkQTeQabvr9Tc9JpwCfdzy6ITM0EZqOF5jCQdvDQC2p 7AUAn0lfUvWMDHC/Os7zC7l0NlXJT8Kp =O9w0 -----END PGP SIGNATURE----- --JSkcQAAxhB1h8DcT--