sudo dd if=boot0_sdcard.fex of=/dev/sdf bs=1k seek=8
sudo dd if=u-boot.fex of=/dev/sdf bs=1k seek=19096
sudo dd if=sunxi_mbr.fex of=/dev/sdf bs=1k seek=20480
sudo dd if=boot-resource.fex of=/dev/sdf bs=1k seek=36864
sudo dd if=env.fex of=/dev/sdf bs=1k seek=69632
sudo dd if=boot.fex of=/dev/sdf bs=1k seek=86016