guide to boot from usb3 disk full encrypted in rock64

[ksrarc]

Hello to all.

I would like to boot a usb3 full encrpyted hardisk with rock64 board. I already have the disk running with a Rpi2, i followed the guides in ArchLinux Wiki and some other places. The disk layout is: LUKS -> LVM -> ( BTRFS | other volumes). The boot process in rock64 is with U-Boot and i am new with this. Can you help me?

Why? Well, the rock64 has USB3 and Gigabit LAN and i like a lot ArchLinux.

Thanks.