e2fsck doesn't repair broken ext4

e2fsck doesn't repair broken ext4

[Jörg Sommer]

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Hi,

after a system crash, I had a problem with ext4 that e2fsck didn't fix. I
don't know if e2fsck or ext4 was wrong. In the end, I had to remove the
broken directory, which succeed and solved my problem.

These are the steps I did:

01 % e2fsck -fy /dev/root
02 % dumpe2fsck -x /dev/root
03 % e2image -r /dev/root
04 % apt-get install
05 % dmesg
06 % dumpe2fs -x /dev/root
07 % e2image -r /dev/root
08 % e2fsck -y /dev/root
09 % dumpe2fs -x /dev/root
10 % e2image -r /dev/root
11 % apt-get install
12 % dmesg

I've put the output and images of all these commands at
<http://alioth.debian.org/~jo-guest/ext4/>. I hope they help you somehow.

Regards, Jörg.
-- 
Eine Blume geht über eine Wiese, sieht einen schönen Menschen und reißt
ihm den Kopf ab.

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Re: e2fsck doesn't repair broken ext4

[Eric Sandeen]

Jörg Sommer wrote:
> Hi,
> 
> after a system crash, I had a problem with ext4 that e2fsck didn't fix. I
> don't know if e2fsck or ext4 was wrong. In the end, I had to remove the
> broken directory, which succeed and solved my problem.
> 
> These are the steps I did:
> 
> 01 % e2fsck -fy /dev/root
> 02 % dumpe2fsck -x /dev/root
> 03 % e2image -r /dev/root

Great, thanks for gathering the images.

What version of e2fsprogs were you using?

-Eric

> 04 % apt-get install
> 05 % dmesg
> 06 % dumpe2fs -x /dev/root
> 07 % e2image -r /dev/root
> 08 % e2fsck -y /dev/root
> 09 % dumpe2fs -x /dev/root
> 10 % e2image -r /dev/root
> 11 % apt-get install
> 12 % dmesg
> 
> I've put the output and images of all these commands at
> <http://alioth.debian.org/~jo-guest/ext4/>. I hope they help you somehow.
> 
> Regards, Jörg.

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Re: e2fsck doesn't repair broken ext4

[Eric Sandeen]

Eric Sandeen wrote:
> Jörg Sommer wrote:
>> Hi,
>>
>> after a system crash, I had a problem with ext4 that e2fsck didn't fix. I
>> don't know if e2fsck or ext4 was wrong. In the end, I had to remove the
>> broken directory, which succeed and solved my problem.
>>
>> These are the steps I did:
>>
>> 01 % e2fsck -fy /dev/root
>> 02 % dumpe2fsck -x /dev/root
>> 03 % e2image -r /dev/root
> 
> Great, thanks for gathering the images.
> 
> What version of e2fsprogs were you using?

Ok never mind on that.  recent release has the same problem.

so this is 2.6.33-rc7 ...

you had:

[  347.673207] EXT4-fs error (device hda4): make_indexed_dir: invalid rec_len for '..' in inode 425166
(wish we'd print out the actual bad rec_len there ...)

# mount -o loop 03-e2image-r  mount/
# find mount/ -inum 425166
# mount/usr/share/ri/1.8/system/String
# touch mount/usr/share/ri/1.8/system/String/foobar
touch: cannot touch `mount/usr/share/ri/1.8/system/String/foobar': Input/output error
# dmesg | tail -n 1
EXT4-fs error (device loop0): make_indexed_dir: invalid rec_len for '..' in inode 425166
# debugfs 03-e2image-r

debugfs:  ls -l <425166>
 425166   40755 (2)      0      0    4096 11-Mar-2010 05:37 .
 424052   40755 (2)      0      0    4096  1-Feb-2010 16:53 ..
      0       0 (2)      0      0       0                   ..
      0       0 (2)      0      0       0                   .
 426379  100644 (1)      0      0    8494 10-Jan-2010 09:01 cdesc-String.yaml
 426380  100644 (1)      0      0     293 10-Jan-2010 09:01 new-c.yaml
...

Not sure what's going on with the duplicate 0-inode entries there yet.

-Eric

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Re: e2fsck doesn't repair broken ext4

[Jörg Sommer]

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Hi,

Jörg Sommer hat am Fri 12. Mar, 21:54 (+0100) geschrieben:
> after a system crash, I had a problem with ext4 that e2fsck didn't fix. I
> don't know if e2fsck or ext4 was wrong. In the end, I had to remove the
> broken directory, which succeed and solved my problem.
> 
> These are the steps I did:
> 
> 01 % e2fsck -fy /dev/root
> 02 % dumpe2fsck -x /dev/root
> 03 % e2image -r /dev/root
> 04 % apt-get install
> 05 % dmesg
> 06 % dumpe2fs -x /dev/root
> 07 % e2image -r /dev/root
> 08 % e2fsck -y /dev/root
> 09 % dumpe2fs -x /dev/root
> 10 % e2image -r /dev/root
> 11 % apt-get install
> 12 % dmesg
> 
> I've put the output and images of all these commands at
> <http://alioth.debian.org/~jo-guest/ext4/>. I hope they help you somehow.

I would like to ask, if there was any result from this issue? Did you
found a bug in e2fsck?

Bye, Jörg.
-- 
< Mr X.> jo: contact an admin to mount it for you
< jo> The admin is not, well how should I say it, he isn't very familiar with
      the system. What should I tell my admin, what he should do?
< Mr X.> taking a sun solaris administration course.

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Re: e2fsck doesn't repair broken ext4

[Eric Sandeen]

On 04/16/2010 05:11 AM, Jörg Sommer wrote:
> Hi,
> 
> Jörg Sommer hat am Fri 12. Mar, 21:54 (+0100) geschrieben:
>> after a system crash, I had a problem with ext4 that e2fsck didn't fix. I
>> don't know if e2fsck or ext4 was wrong. In the end, I had to remove the
>> broken directory, which succeed and solved my problem.
>>
>> These are the steps I did:
>>
>> 01 % e2fsck -fy /dev/root
>> 02 % dumpe2fsck -x /dev/root
>> 03 % e2image -r /dev/root
>> 04 % apt-get install
>> 05 % dmesg
>> 06 % dumpe2fs -x /dev/root
>> 07 % e2image -r /dev/root
>> 08 % e2fsck -y /dev/root
>> 09 % dumpe2fs -x /dev/root
>> 10 % e2image -r /dev/root
>> 11 % apt-get install
>> 12 % dmesg
>>
>> I've put the output and images of all these commands at
>> <http://alioth.debian.org/~jo-guest/ext4/>. I hope they help you somehow.
> 
> I would like to ask, if there was any result from this issue? Did you
> found a bug in e2fsck?

I'm sorry, I haven't made further progress on this yet.

-Eric

> Bye, Jörg.

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