Thanks a lot. I have another question to ask.
Do all kinds of 2kB-page NAND flash obey to the sequential page writing 
order rule?

rohit h wrote:
>> It has a program limitation that the program addressing should
>> be done in sequential order in a block, i.e. random page address
>> programming is prohibited.
>>
>> We are new to Yaffs, so I wanna know if yaffs support such kind of
>> NAND device.
>>     
>
> Yaffs2 only programs sequentially in a block, starting from page 0
> and ending at the last page.
>
> Quote from http://www.yaffs.net/node/38:
> "The original motivation for YAFFS 2 was to add support for the new
> NAND with 2kB pages instead of 512-byte pages and strictly sequential
> page writing order."
>