Selectable boot from eMMC and sdcard


#1

By default, RockPi 4 will always boot from eMMC first when boot partition is present in both eMMC and sdcard.

Is it possible to selectively boot from sdcard or eMMC?


#2

How do you want to select? Like the pc with a grub menu and user keyboard to select?


#3

Yes! That would be great!


#4

a grub menu using keyboard to select or anything else equivalently convenient is good too.


#5

I had the same problem when I upgraded from Debian armhf to Debian arm64. A faster microSD card resolved the issue. If the microSD doesn’t respond quickly, arm64 will ignore it’s boot partition.

@O635789 informed me of this and also posted a great comparison of microSD cards on: