I have a problem with my BPi and burning Debian to EMMC. When I upload to SD Debian 2016-09-27, I can boot without problems. But I do not see the EMMC partition over fdisk -l. I tried to copy to SD Debian 2016-11-29 and Ubuntu 2017-05-25, but neither one works. I end in the boot loop. Can I ask for help?