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USB Attached SCSI (UAS) (USB Devices) reporting incorrect speed


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When attaching USB 3.0 drive that supports UASP the drive speed is reported as USB 2. As USB 2 tops out at 60MBs and this drive is benchmarking at 260MBs then I assume this is incorrect. If I use a non UASP device the correct speed is shown.


Please see attached jpg.


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  • 2 months later...

We've got a S2510BPU33 box today, and connected it to an Etron USB 3.0 controller.  The information reported by AIDA64 on its  Devices / USB Devices page looks like this:

  [ USB Mass Storage Device (USB3.0 Device) ]

    Device Properties:
      Device Description                                USB Mass Storage Device
      Device ID                                         174C-1053
      Device Class                                      08 / 06 (Mass Storage)
      Device Protocol                                   50
      Manufacturer                                      Generic
      Product                                           USB3.0 Device
      Serial Number                                     AC0000000001
      Supported USB Version                             3.00
      Current Speed                                     Super  (USB 3.0)

I think in your case the SATA-to-USB 3.0 bridge chip of the box (ASMedia ASM1053) may be having an issue with the NEC USB 3.0 controller, and that's why it switches down to USB 2.0 mode.



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