Booting from USB on RPI3

[bob prohaska]

> 
> On 2020-Apr-25, at 15:26, bob prohaska <fbsd at www.zefox.net> wrote:
> 
> > Sticking the existing microSD in a USB adapter and trying to
> > boot it is easy and worth a try, if only to debunk my claim
> > that this particular Pi3 _requires_ a microSD card to start. 
> 
Just tried booting the existing microSD card in a USB adapter,
with no microSD in the slot. It worked hands off.

Also tried booting the USB mechanical hard disk with a microSD in
the slot having only bootcode.bin and timeout files. That 
worked hands off.

So, there's nothing wrong with this Pi3B, the entire drill
was  all operator error.....

Thanks to everyone for much patient good counsel!

bob prohaska