ext3_free_blocks_sb when removing a more than 1GB file

[Stephane Cerveau]

:) I'm not removing the key during the test.

Yes "umount/mount/rm", "umount/fsck/mount/rm" and "rm" give the same error...

I have several keys from the same brand, model and I have the same issue.

When I said, a different key, it was a different brand.

At the end, it seems that ext2 is working fine!

So maybe a problem in ext3 in 2.6.23 kernel ?!?
I had a try on 2.6.32_27, I did not succeed to reproduce the issue.

Do you know when ext3 is supposed to be stable ?

BR

Stephane


-----Original Message-----
From: Eric Sandeen [mailto:sandeen at redhat.com]
Sent: vendredi 4 mars 2011 18:59
To: Stephane Cerveau
Cc: ext3-users at redhat.com; Tristan Pateloup
Subject: Re: ext3_free_blocks_sb when removing a more than 1GB file

On 3/4/11 11:54 AM, Stephane Cerveau wrote:
> Hi,
>
> Thanks for your answer.
> Here is my steps:
>
> - mkfs.ext3 /dev/sda1
> - mount /dev/sda1 /mnt/usb
> - dd if=/dev/zero of=/mnt/usb/test_file bs=1M count=1025   ( the size is important)
> - sync
> - rm /mnt/usb/test_file

Ok, I had the impression that you were removing the usb key at
some point in the test, but I guess not.

> Then many errors appears "Ext3-fs error ( device sda1): ext3_free_blocks_sb: bit already cleared for block xxxx"
>
> I tried to umount/mount the storage but its not working also.
> I tried to check the device before removing the file, not working also.

you mean that umount/mount/rm gives the same error?  As does umount/fsck/mount/rm ?

> Indeed with another usb key it's working...
> I'm using a kernel 2.6.23
>
> The problem does NOT appear with mkfs.ext2 /dev/sda1 before
>
> What do you advise to do ?

Try a much newer kernel, first of all, to see if it's a known, fixed bug.

But since it works on another usb key, I still tend to blame the hardware.
"bit already cleared" makes it sound like it is reading zeros when it
should not be.

-Eric

> BR
>
> Stephane.




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