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


ajs6000
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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.

 

Regards,
Fiery

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