On Saturday 18 October 2008 02:06:11 fs p wrote:
> 1. if there is no spare area use( large page MLC) ,  is the inband tag can
> work well?
Yes

> 2. what about the inband tag size and  overhead?
The inband tags has an overhead in that the chunks are no longer 2^n aligned. 
This can cause more byte copying. It also causes more reads to read the tags.

> 3. If there is  some limit  in use lage capability MLC nand,such as 4GB or
> above
Not really.

> 4. porting YAFFS on RTOS  , what should note  about the direct interface

I'm unsure what you're actually asking here. Yaffs Direct is normally used in 
an RTOS.