Booting Linux/Debian from the eMMC

[linuxha]

Okay, I've been searching like mad to get my RockPro64 back up and running. I figured out the serial (the jumper to select 3v3 is important). It would work for a little while then not. At least now I have a backup board but I'll put that to good use. 

Now I've been searching the site for how to copy over the Debian image (Armbian) to the emmc and then booting from emmc. I ran this:

cat /tmp/Armbian_21.02.1_Rockpro64_buster_current_5.10.12.img.xz | xz -d | dd bs=30M of=/dev/mmcblk2

Fdisk shows:

# fdisk -l /dev/mmcblk2
Disk /dev/mmcblk2: 58.2 GiB, 62537072640 bytes, 122142720 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xcb08aa40

Device                      Boot   Start       End Sectors  Size  Id  Type
/dev/mmcblk2p1      32768 3571711 3538944       1.7G 83 Linux


I attempted to boot (SW4 removed), SD and eMMC installed. Only boots to SD.

Pointers please
thanks