mount -t ext2 /dev/mmcblk0p2/opt ./mkfs.jffs2 -r /opt -o /media/mmc1/rootfs.jffs2 -e 128 -l -n umount /opt ./flash_eraseall -j /dev/mmcblk0p2 ./nandwrite -a -p /dev/mtd4 /media/mmc1/rootfs.jffs2