Re: detect what type of USB it is connected to

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Alan Stern <stern@...> writes:

> 
> On Sat, 11 Jul 2015, James wrote:
> 
> > I have an external drive that has an activity LED.
> > It would be nice if it told me if it was connected to a USB2 or USB3 port.
> > Is it possible for devices to know what they are connected to?
> 
> How would you expect the drive to tell you what sort of port it is 
> connected to?  By shining an LED of a different color?  Green for USB-2 
> and blue for USB-3, for example?
Yes.
The device could have different coloured LEDs depending on the speed it is
transferring data.

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