> Livio Tenze wrote:
> ...
> > 5) I mount again the filesystem mount -t yaffs /dev/mtd/5 /mnt
> > 6) If I try to read the previously written data, it is not
> possibile.
> > The files I copied are empty or are no longer visibile.
> >
> > If I do not umount the filesystem yaffs seems to work well,
> but if I
> > umount the filesystem I am no longer able to read the written data.
>
> Check for bad blocks messages in dmesg at mtd NAND chip probe
> time. The blocks are probably being marked bad per previous
> email, and next time the chip is probed the overwritten bad
> block markers are read.
>
As Todd said/implied this is almost certainly caused by a bad mtd
hook-up causing scrambling of the tags stored in the oob area.
If you have not yet tried Sergey's patch you might see if that helps.
-- Charles
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