EXT4-fs (dm-0): unsupported inode size: 0

EXT4-fs (dm-0): unsupported inode size: 0

[Pol Hallen]

Hi folks :-)

on a backup usb disk I've formatted ext4 (debian stable, kernel (2.6.32 
vanilla).

Later sometimes when i try to mount this disk in syslog I see:

EXT4-fs (dm-0): unsupported inode size: 0

the health how disk is good..

tune2fs -l /dev/disk is:

tune2fs 1.41.12 (17-May-2010)
tune2fs: Filesystem revision too high while trying to open /dev/mapper/pp
Couldn't find valid filesystem superblock.

what is the problem? Is an ext4 problem?

what can I do to fix the problem?
thanks :-)

Pol

Re: EXT4-fs (dm-0): unsupported inode size: 0

[Eric Sandeen]

On 11/2/10 8:29 AM, Pol Hallen wrote:
> Hi folks :-)
> 
> on a backup usb disk I've formatted ext4 (debian stable, kernel (2.6.32 
> vanilla).
> 
> Later sometimes when i try to mount this disk in syslog I see:
> 
> EXT4-fs (dm-0): unsupported inode size: 0
> 
> the health how disk is good..
> 
> tune2fs -l /dev/disk is:
> 
> tune2fs 1.41.12 (17-May-2010)
> tune2fs: Filesystem revision too high while trying to open /dev/mapper/pp
> Couldn't find valid filesystem superblock.
> 
> what is the problem? Is an ext4 problem?

Seems the disk is badly corrupted.

What does blkid /dev/mapper/pp say?  Maybe it's got something besides
ext4 on it now.

-Eric

> what can I do to fix the problem?
> thanks :-)
> 
> Pol
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: EXT4-fs (dm-0): unsupported inode size: 0

[Ted Ts'o]

On Tue, Nov 02, 2010 at 02:29:06PM +0100, Pol Hallen wrote:
> Hi folks :-)
> 
> on a backup usb disk I've formatted ext4 (debian stable, kernel (2.6.32 
> vanilla).
> 
> Later sometimes when i try to mount this disk in syslog I see:
> 
> EXT4-fs (dm-0): unsupported inode size: 0
> 
> the health how disk is good..
> 
> tune2fs -l /dev/disk is:
> 
> tune2fs 1.41.12 (17-May-2010)
> tune2fs: Filesystem revision too high while trying to open /dev/mapper/pp
> Couldn't find valid filesystem superblock.
> 
> what is the problem? Is an ext4 problem?

Sounds like your superblock got corrupted in an interesting way.  Try
"e2fsck -b 32768 /dev/disk".

					- Ted

Re: EXT4-fs (dm-0): unsupported inode size: 0

[Pol Hallen]

> What does blkid /dev/mapper/pp say?  Maybe it's got something besides
> ext4 on it now.

/dev/mapper/pp: UUID="cfbe4076-753a-4d3c-9b9d-e18c6e0f2957" TYPE="ext4" 
/dev/sdb1: UUID="a805e772-0bca-4f4c-ad60-f3d0eaf2cc32" TYPE="crypto_LUKS" 

Pol

Re: EXT4-fs (dm-0): unsupported inode size: 0

[Pol Hallen]

> Sounds like your superblock got corrupted in an interesting way.  Try
> "e2fsck -b 32768 /dev/disk".

exactly :-( but why?

This disk is perfect (almost.. I thinked :-)

smart monitor said is ok (smartmontools)

with you advice, after some time:

Error deallocating inode 21637778: Illegal doubly indirect block found
e2fsck: aborted

and now?

is a ext4 bug?

I used this disk 3 times..

Pol