> I think there is no bad block in the flash( never write it before ).
> The root.yaffs is maded by mkyaffsimage ,I think problem is nandwrite OOB
> info to flash  .
> My step is :
> # flash_eraseall /dev/mtd0
> #mkyaffsimage root root.yaffs
> #nandwrite -a -o /dev/mtd0 root.yaffs
> Is there something wrong ?

Does mkyaffsimage support OOB autoplacement?