david-tay...@blueyonder.co.uk said:
> I've built three Raspberry Pi stratum-1 NTP servers:
...
> and on none of these have I seen any USB problems
...

As I understand it, the problem with USB on the Raspberry Pi is that the 
new/second version left out the current limiting on the power to the USB 
connectors.  So when you plug in a device, there will be a glitch on the 5V 
power rail as the empty filter caps get charged up.  So if you don't plug 
things in, it should work OK.

You might also get lucky if the caps on your devices are small or you have 
long USB cables or you have a solid power supply for your Raspberry Pi or ...


-- 
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