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Hi I recently bought an USB3 external hdd.

To my surprise when transferring files from my laptop (Ubuntu 12.04 installed) to this hdd (connected to a USB3 port using an USB3 cable), the speed is exactly the same that I get with other USB2 devices.

Is there a way to check if the USB3 super speed is enabled? Do I need to load some kernel modules at boot? How can I make the transfer rate increase?

lsusb -v and dmesg.

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    Are you sure the disk is plugged into the correct USB 3.0 port? Can you post on paste.ubuntu.com the output of these commands when USB3 external hdd is connected: lsusb -v: and dmesg? – Radu Rădeanu Aug 20 '13 at 17:15
  • @RaduRădeanu, thanks! yes it is connected to the USB3 port. The output of lsusb -v is here paste.ubuntu.com/6007726 and the output of dmesg is here paste.ubuntu.com/6007732 thanks in advance for the help! – lucacerone Aug 20 '13 at 20:02
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From what can I see from your output of dmesg, the SuperSpeed is enabled for sure:

925  [ 2367.435312] usb 4-2: new SuperSpeed USB device number 2 using xhci_hcd

But you get some fails:

931  [ 2367.452508] usb 4-2: Enable of device-initiated U1 failed.
932  [ 2367.452666] usb 4-2: Enable of device-initiated U2 failed.
933  [ 2367.453158] usb 4-2: Enable of device-initiated U1 failed.
934  [ 2367.453310] usb 4-2: Enable of device-initiated U2 failed.
...
937  [ 2367.516876] usb 4-2: Enable of device-initiated U1 failed.
938  [ 2367.517032] usb 4-2: Enable of device-initiated U2 failed.

You also have a warning in the output of lsusb -v:

131        bDescriptorType         4Couldn't open device, some information will be missing
132  Couldn't open device, some information will be missing

Now, sorry because I have to tell you this: I suspect it's a hardware failure - the external hdd could be at fault or might be a cable coming loose. To be sure, try to check them (the hdd and the cable) on another system/machine.

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