Re: [PATCH 00/22 take 3] UBI: Unsorted Block Images

David Woodhouse
2007-03-26T09:46:18Z

On Mon, 2007-03-26 at 03:04 +0200, Jörn Engel wrote:
> That limitation stems from ECC and ECC is done in software. Currently
> everyone and his dog is doing ECC in chunks of 256 bytes on NAND. So
> your minimum write size is 256 bytes _if you care about ECC_. If you
> don't care, you can write single bits on NAND, just as you can on NOR.

No, on NAND flash it's a limitation of the hardware. The number of write
cycles you can perform to a given page is limited. Exceed it and the
contents of that page become undefined due to leakage, until you next
erase it.

--
dwmw2