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Date:	Thu, 13 Nov 2008 18:16:48 -0800
From:	Kelly Kane <>
Subject: Re: Call traces on console from a test machine

Kelly Kane wrote:
> This is a vanilla 2.6.27 kernel + grsec + "2.6.27-ext4-2" patchset + the 
> following patch per Sandeen:

I applied patch:;a=commitdiff;h=8c3f25d8950c3e9fe6c9849f88679b3f2a071550#patch1

and built a new kernel.

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
(2152305) references inode
                2901322 in group 354 where _INODE_UNINIT is set.
Entry 'spice-and-wolf-si-tendra-segunda-temporada' in
(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:

Unfortunately I cannot mount the filesystem right now due to:

EXT4-fs: ext4_check_descriptors: Checksum for group 353 failed 
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?

Also, to append my prior email, this is the original error from the machine:

Nov 13 15:58:49 watanabe EXT4-fs error (device sdb1): 
htree_dirblock_to_tree: bad entry in directory #51577: rec_len % 4 != 0 
- offset=0, inode=943022112, rec_len=13614, name_len=52
Nov 13 15:58:49 watanabe Aborting journal on device sdb1:8.
Nov 13 15:58:49 watanabe Remounting filesystem read-only


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