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RE: ext3_free_blocks_sb when removing a more than 1GB file



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

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.
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 ?

BR

Stephane.


-----Original Message-----
From: Eric Sandeen [mailto:sandeen redhat com]
Sent: vendredi 4 mars 2011 18:45
To: Stephane Cerveau
Cc: ext3-users redhat com; Tristan Pateloup
Subject: Re: ext3_free_blocks_sb when removing a more than 1GB file

On 3/4/11 11:33 AM, Stephane Cerveau wrote:
> Hello,
>
>
> I checked the storage that seems to be ok ( check bad block) and I
> still have the problem. I did the test on vfat and I don’t have the
> problem. I'm using a 2.6.23 kernel ? When the ext3 fs is considered
> as stable ?

I don't mean that it's an IO error or a bad block, but perhaps a behavioral
problem with the flash; maybe not syncing properly before it's powered
off, etc.  If it only happens with some USB drives, I do not think
it is an ext3 issue.

Your original problem report may not have been totally clear so maybe
I misunderstand.

Can you show exactly what you did, and exactly what error messages
you received, keeping in mind that any IO type errors that don't
say "ext3" are also relevant?

-Eric

> BR
>
> -----Original Message----- From: Eric Sandeen
> [mailto:sandeen redhat com] Sent: vendredi 4 mars 2011 17:26 To:
> Stephane Cerveau Cc: ext3-users redhat com; Tristan Pateloup Subject:
> Re: ext3_free_blocks_sb when removing a more than 1GB file
>
> On 3/4/11 9:45 AM, Stephane Cerveau wrote:
>> Dear all,
>>
>> It seems that if I change the size of blocks to 2048 by mkfs.ext3
>> –b 2048 /dev/sda1, the problem does not appear.
>>
>> Is there a way to know by advance what is the best block size for
>> an external device ?
>>
>> BR
>
> Sounds like a storage problem; not a filesystem problem, something to
> do with the flash behaving badly.
>
> -Eric
>
>
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