Hello! I has used yaffs from CVS on montavista-cee3.1 today, the step is: flash_eraseall /dev/mtd/0 (I found some bad block:( mount /dev/mtd/0 /mnt/flash -t yaffs cp -a /mydir /mnt/flash (yaffs printed some error messages: ecc error unfixed on chunk ** Block ** marked for retirement ....) and when i unmounted mtd/0, and called flash_eraseall, i found some more bad blocks:( so, what's wrong with it? yaffs or nand driver? Thank you for your reply!