> It must be stored somewhere, but it may be in the firmware itself,
> hardcoded. I wonder if it is in the mmcblk0boot0 area. There doesn't
> seem to be much about this on the net. It's probably nothing, but when
> there's something mysterious laying around, there is a tendency to
> assume it must be to blame for any problems.
AFAIK `mmcblk0boot0` and `mmcblk0boot1` are "normal" in that what you
read is really what is there, there is no magic to them.
The only unusual part is that they are "hardware" partitions, not
something you can change with `fdisk` and friends.
Most GNU/Linux thingies never touch them, AFAICT, so for example on my
NanoPi I get:
# od /dev/mmcblk2boot0
0000000 000000 000000 000000 000000 000000 000000 000000 000000
*
20000000
#
If that command also shows you that it's just full of zeroes as it is
for me, then clearly there isn't "something mysterious laying around".
=== Stefan
