[linux-lvm] EXT3-fs: unable to read superblock

[linux-lvm] EXT3-fs: unable to read superblock

[Jean Chiappini]

Hello all,

I have a server production with centos 4 with kernel 2.6.9-42 and 
lvm2-2.02.06 installed. All was working find, but today the server 
crashed. When I would reboot my server, I saw in the log that the lvm 
partiton wouldn't mount. This is the error -> kernel: EXT3-fs: unable to 
read superblock.

If I try to mount manually the partition, these errors appears :

the superblock could not be read or does not describe a correct ext2 
filesystem. if the device is valid and it really contains an ext2 
filesystem (and not swap or ufs or something else), then the superblock 
is corrupt, and you might try running e2fsck with an alterate superblock:

I don't understand these errors, my partition if formated in ext3...

Someone could help me please ???

Regards

Jean

Re: [linux-lvm] EXT3-fs: unable to read superblock

[Evan Cofsky]

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On 12/11 17:33, Jean Chiappini wrote:
> Hello all,
> 
> I have a server production with centos 4 with kernel 2.6.9-42 and 
> lvm2-2.02.06 installed. All was working find, but today the server 
> crashed. When I would reboot my server, I saw in the log that the lvm 
> partiton wouldn't mount. This is the error -> kernel: EXT3-fs: unable to 
> read superblock.

I had this problem recently with a few systems.  Try booting to
single-user mode, and then do the following command:

tune2fs -j DEVICE-FILE-WITH-PROBLEM

This will create a new journal on the filesystem.  I haven't tracked
down why the journal disappears yet, but it seems to, and then the
system (of course) won't mount it as ext3.

-- 
Evan Cofsky, The Architect <evan@theunixman.com>
http://www.theunixman.com/

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Re: [linux-lvm] EXT3-fs: unable to read superblock

[Jean Chiappini]

Thank you for your answer, but when I do this command, this error appear :
tune2fs: Argument invalide while trying to open 
/dev/mapper/VolGroup00-mysqldata
Couldn't find valid filesystem superblock.

The only solution I see now is to format this partition...

Evan Cofsky wrote:
> On 12/11 17:33, Jean Chiappini wrote:
>   
>> Hello all,
>>
>> I have a server production with centos 4 with kernel 2.6.9-42 and 
>> lvm2-2.02.06 installed. All was working find, but today the server 
>> crashed. When I would reboot my server, I saw in the log that the lvm 
>> partiton wouldn't mount. This is the error -> kernel: EXT3-fs: unable to 
>> read superblock.
>>     
>
> I had this problem recently with a few systems.  Try booting to
> single-user mode, and then do the following command:
>
> tune2fs -j DEVICE-FILE-WITH-PROBLEM
>
> This will create a new journal on the filesystem.  I haven't tracked
> down why the journal disappears yet, but it seems to, and then the
> system (of course) won't mount it as ext3.
>
>   
> ------------------------------------------------------------------------
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@redhat.com
> https://www.redhat.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

Re: [linux-lvm] EXT3-fs: unable to read superblock

[Evan Cofsky]

On 12/12 11:16, Jean Chiappini wrote:
> Thank you for your answer, but when I do this command, this error appear :
> tune2fs: Argument invalide while trying to open 
> /dev/mapper/VolGroup00-mysqldata
> Couldn't find valid filesystem superblock.

Have you tried e2fsck on it yet?

-- 
Evan Cofsky, The Architect <evan@theunixman.com>
http://www.theunixman.com/