Passmark USB3-Test showed bus errors

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  • Edgar
    Newbie
    • Sep 2016
    • 1

    #1

    Passmark USB3-Test showed bus errors

    I have observed CRC-16 physical link layer errors on one out of two USB 3.0 ports on my board. I am searching for the root cause of this issue.
  • David (PassMark)
    Administrator
    • Jan 2003
    • 11092

    #2
    What chipset s being used in the host? Is this with a hub?

    It normally indicates some type of data corruption, maybe due to electrical issues.

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    • HamidK (PassMark)
      Employee
      • Jul 2016
      • 47

      #3
      Are you using the front panel USB ports? Physical errors are common when using front ports.
      The physical errors occur in a USB 3.0 bus when there is a signal integrity issue. A limited number of these errors are considered normal as long as there are no link layer errors. Compared to physical errors, link layer errors are a major concern as they may cause resetting of the communication if the number of link layer errors exceed the threshold of 64.

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