On Tue, 12 Sep 2006 12:02:29 +1200
Charles Manning <manningc2@actrix.gen.nz> wrote:

> On Tuesday 12 September 2006 11:17, Andre Renaud wrote:
> > When using YAFFS, is it possible to store the tags data in the page
> > itself, rather than in the OOB area?
> 
> This is not yet implemented but has been identified as something that might be 
> worth doing.
> 
> > I noticed a discussion a while ago 
> > regarding Samsung OneNAND, in which this method was suggested as a way
> > of avoiding the restrictions that device placed on the OOB bytes. I have
> > a chip with similar restrictions, which I can use fine to store straight
> > data in, but not with YAFFS for the filesystem, due (I believe) to the
> > OOB issues.
> 
> THis would allow yaffs to be used with a far wider variety of media, including 
> NOR, USB Mass storage etc.

The other reason is that for MLC NAND flashes with HW ECC-capable controller there might well be insufficient space in OOB for yaffs tags, and it will only get worse...

Vitaly