Starting Armbian from USB flash drive

Flash Armbian image file to USB flash drive:

gnome-disks --restore-disk-image /home/ash/src/Build-Armbian-jethome/output/images/JetHome_1.0.3_Armbian_20.08_Arm-64_focal_current_5.7.16.img

Edit file BOOT/uEnv.txt on USB flash drive:

FDT=/dtb/amlogic/jethome-j100-v1.dtb
#FDT=/dtb/amlogic/jethome-j80-v1.dtb
 
APPEND=root=LABEL=ROOTFS rootflags=data=writeback rw console=ttyAML0,115200n8 console=serial no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0
#APPEND=root=LABEL=ROOTFS rootflags=data=writeback rw console=ttyAML0,115200n8 no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0

Insert USB flash drive into device, power on device, go to u-boot console and execute command:

usb start && for usbdev in 0 1 2 3; do if fatload usb ${usbdev} 1020000 s905_autoscript; then autoscr 1020000; fi; done

Flash Armbian image file to USB flash drive:

gnome-disks --restore-disk-image /home/ash/src/Build-Armbian-jethome/output/images/JetHome_1.0.3_Armbian_20.08_Arm-64_focal_current_5.7.16.img

Insert USB flash drive into device, power on device, go to u-boot console and execute command:

usb start && for usbdev in 0 1 2 3; do if fatload usb ${usbdev} 1020000 s905_autoscript; then autoscr 1020000; fi; done