chattr -i FILENAME not working

[Tom H]

On Fri, Nov 26, 2010 at 5:17 PM, Arthur Bela <jozsi.avadkan at gmail.com> wrote:
>
> Linux asdf 2.6.35-23-generic-pae #40-Ubuntu SMP Wed Nov 17 22:32:51
> UTC 2010 i686 GNU/Linux
>
> Distributor ID: Ubuntu
> Description:    Ubuntu 10.10
> Release:        10.10
> Codename:       maverick
>
>
> # lsattr FILENAME
> -----------------e- FILENAME
>
> # echo "1" >> FILENAME
> bash: FILENAME: Permission denied

>From man page:
The 'e' attribute indicates that the file is using extents for  mapping
the blocks on disk.  It may not be removed using chattr(1).