[Yaffs] bit error rates --> a vendor speaks

Jörn Engel joern at wohnheim.fh-wedel.de
Tue Feb 21 04:35:50 EST 2006

On Tue, 21 February 2006 09:26:13 +0100, Thomas Gleixner wrote:
> It's about some piece of software relying on a non guaranteed hardware
> feature.
> I'm looking into the variety of hardware which evolves around NAND flash
> and I carefully look in which direction this is going.
> I see that the near future will require more complexity in the nand code
> and I'm looking for a sane solution for that. I'm not saying that its
> wrong, when something uses a nice hardware feature, but my point still
> stands that it is wrong to rely on a feature which is nowhere
> guaranteed. 

Ack.  One of the better features of hard disks is that they have a
standard interface.  I can take an ext3 image from a 5 year old disk
from one vendor and write it to a brand new disk from a different
vendor and things just work.  No conversion tool is needed.

For flash, moving images between arbitrary chips is just a pipe dream.
But things will get pushed into that direction.  So for a filesystem
to work on many chips, it should be prepared to work with different
page- and block-sizes and not rely on OOB at all.


You ain't got no problem, Jules. I'm on the motherfucker. Go back in
there, chill them niggers out and wait for the Wolf, who should be
coming directly.
-- Marsellus Wallace

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