On Sun, 17 Jan 2010, Sarah Sharp wrote: > The USB 3.0 specification does list the speeds in an interesting way > that makes me think we could see USB 3.0 devices be faster than 5Gb/s. > Checkout Table 9-13. What's special about this table? And how does it indicate you could get speeds faster than 5 Gb/s? (Actually, 5 Gb/s is a physical speed, not a logical speed. Because of the 10/8 encoding, each byte occupies 10 bits on the line. Hence the maximum logical speed is 500 MB/s, rather than 625 MB/s.) I have to admit, though, the description for the wSpeedsSupported field is a little strange. It says: Bitmap encoding of the speed supported by this device when operating in SuperSpeed mode. Which is ridiculous, because when it's operating in SuperSpeed mode the only speed it supports is SuperSpeed. 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
