Re: [Yaffs] Can I use yaffs2 on 512-byte sized nand flash?

On Thursday 24 July 2008 12:21:26 James Kehl wrote:
> > -----Original Message-----
> > From: yaffs-bounces@lists.aleph1.co.uk [mailto:yaffs-
> > bounces@lists.aleph1.co.uk] On Behalf Of ???
> > Sent: Wednesday, 23 July 2008 9:29 PM
> > To: yaffs@lists.aleph1.co.uk
> > Subject: [Yaffs] Can I use yaffs2 on 512-byte sized nand flash?
>
> ...
>
> > In the section "Tag structure", below the table I noticed this message"To
> > get enough spare bytes for this tagging structure requires a chunk-size
> > of at least 1kB." I think it's telling me that I cannot use yaffs2 on the
> > 512- byte sized nand flash(K9F5616UOC).
>
> Chunk size is not the same thing as Flash sector size. You can lump
> multiple Flash sectors together into a chunk.

You can also use "inband tags" which put the tags within the data area instead
of the spare area. This overcomes the problem of too few spare bytes to hold
the tags. This approach, however, means that chunks are no longer 2^n aligned
and this might have some impact on performance.