Does UBI support MLC nand flash?

[Josh Boyer]

On Wed, 2 Jan 2008 08:52:28 -0800
David Brown <davidb at davidb.org> wrote:

> On Wed, Jan 02, 2008 at 06:39:45AM -0600, Josh Boyer wrote:
> >On Wed, 2 Jan 2008 14:19:16 +0800
> >Nancy <nancydreaming at gmail.com> wrote:
> >
> >> oh, forgot to metion UBI.
> >> UBI has two headers for each LED/PED, they are not write at same time.
> >> Is that against MLC nand's no ramdom write and  write only once
> >> permission?
> >
> >Not to my knowledge.  The second header is written to the second page
> >in the block if subpage writes aren't supported by the underlying
> >chip.  That should still work fine for MLC.
> 
> Many MLC devices will not allow you to write to the second page after
> having written to the third or subsequent pages.  Would this still work?

Yes... UBI doesn't write actual data to the blocks until both headers
are in place.

josh