thanks for your help.<div>by the way,have you ever tried yaffs on SD card?</div><div>i want to use sd card to replace nand flash.As  i found that sd is not only a lot of nand flash but also include a controller.Some vender have integreted wear-leveling , bad block manangement and some other works that yaffs do itself. So if i want use yaffs on different sd card, can i success or what should i do to accomplish this work?</div>

<div>thanks.</div><div><div>----</div><div>Regards,</div>Ezio.<br>
</div>