On Sat, 28 Jan 2012, Felipe Contreras wrote: > > Usually USB 2.0 and USB 3.0 ports are paired together. The blue USB 3.0 > > port you see actually contains both USB 2.0 and USB 3.0 wires. Unless > > your host really does have three USB 3.0-only ports, and one USB 2.0/3.0 > > port? What kind of USB ports did the packaging advertise? > > This card has 4 USB3 ports, no USB2. A USB-3 controller can also handle USB-2 devices; otherwise you wouldn't be able to use the older devices on your new computer! Most often, a USB-3 port can handle USB-2 devices; in that sense the port can be both USB-2 and USB-3. It's very rare for a port to be USB-3-only -- if it were, you wouldn't be able to use it for older devices. Sarah is guessing that all four of your ports are USB-2 and USB-3, even though the hardware claims that only one of them is. > > Then we get a connection on a USB 2.0 port: > > But there isn't one :) See above. You have at least one and most likely four ports that are both USB-2 and USB-3. > > Does your mass storage device contain a USB hub, or are you plugging the > > mass storage device into the hub? > > Hm? I don't know, I'm plugging it directly into the USB3 card. > > BTW. It works correctly in Windows, although I recall a message saying > that I should connect it to a USB3 port, but it was USB3... What happens if you plug this mass storage device into a computer that doesn't have USB-3? In particular, what does lsusb show when the device is plugged in? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
