On Sat, 7 Mar 2020, James wrote: > The cable is attached to the drive. > I guess the cable could be defective. > > I found out my Realtek USB adapter is USB2 by default but there is a > parameter in the driver to make it USB3. Do you have a pointer or URL for an explanation of that parameter? > I wonder if it is becoming more common to have USB2 by default and then > USB3 by software. I have not heard of such a thing. It seems like a bad idea; why would anybody want their device to run at USB-2 speed by default when it could be running at USB-3 speed? > Unfortunately, I think Linux uses generic drivers. The drivers are largely generic, but they include device-specific quirk lists, so they are not entirely generic. Alan Stern