On Friday 18 June 2010 15:52:24 Ivan Li wrote:
> Hi guys,
>
> I can't mount yaffs2 with MLC K9G8G08U0B.

What do you mean by "can't mount"?

> The spec of this flash lists below:
> Page size:  2048
> Spare size: 64
> Block size: 256K
> ECC: BCH
> OOB used:
> oob-free:(2, 38)
> ecc-pos: 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55,
> 56, 57, 58, 59, 60, 61, 62, 63
>

Are you using Linux? What version?

Almost all probems of this nature are as a result of oob placement.

Add printks to the mtd code to check that your mtd is doing the placement 
correctly.

-- CHarles