On Sun, 15 Jan 2012, Tomasz Chmielewski wrote: > On 01/13/2012 05:02 PM, Alan Stern wrote: > > > One other thing -- I wouldn't bother to use this reader for anything > > even as small as 2 GB. Since it runs only at full speed, not high > > speed, you'd be lucky to get a throughput of 800 KB/s out of it. At > > that rate, reading 16 GB would require close to 6 hours. > > Yep, noticed that as well. > Still, better 800 kB/s than no access at all ;) > > BTW - how can I determine if the device is connected at USB1, USB2, or > USB3 speed? It appears in the system log when the device is plugged in. For example, in your original post: > [254064.056759] usb 2-1.2: new full-speed USB device number 15 using ehci_hcd The "full-speed" part means the device is running at 12 Mb/s (USB-1). For comparison, low speed is 1.5 Mb/s (also USB-1), high speed is 480 Mb/s (USB-2), and SuperSpeed is 5000 Mb/s (USB-3). 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
