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Thunderbolt USB slow?

2778 Views 20 Replies Latest reply: Oct 10, 2013 7:20 AM by tbirdvet RSS
  • nikolay51 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Jun 23, 2012 10:12 AM (in response to Williamvv)

    My TBD also displays this problem with new Mac mini (Mid 2011). Thunderbolt Software Update version 1.1 installed. Anybody nows what's the matter?


  • paulrmc Calculating status...
    Currently Being Moderated
    Aug 7, 2012 2:41 AM (in response to nikolay51)

    Exactly same issue here.


    I was shocked today when I found out the difference. I'm using a USB 2.0-connected LaCie 2GB drive as a secondary drive to my dual-SSD mid-2011 Mac mini Server. Using BlackMagicDesign's Disk Speed Test I came to following results:

    - directly connected to the back of the Mac mini: 29MB/sec write, 33 MB/sec read

    - connected to the TB Display: 7.5MB/sec write, 11.7MB/sec read.

    I'm running OS X Mountain Lion 10.8 on the mini, and the tests were repeatable, after fresh power down - reboot cycles.


    That's not what I bought the Thunderbolt Display for...


    Any ideas, anyone?

  • nikolay51 Level 1 Level 1 (0 points)
    Currently Being Moderated
    Aug 7, 2012 3:15 AM (in response to paulrmc)

    The same for me. I have made a call to the apple supprort and they answered they are

    well-informed  about this issue. They also recomend me to use Mac mini USB port till they resolve the issue.

    Good luck.

  • paulrmc Level 1 Level 1 (10 points)
    Currently Being Moderated
    Aug 7, 2012 4:10 AM (in response to nikolay51)

    Well, if that means they WILL resolve the issue eventually, I guess that's good news.

  • tbirdvet Level 3 Level 3 (935 points)
    Currently Being Moderated
    Oct 10, 2013 7:20 AM (in response to paulrmc)

    I have the same issue on a new TBD.  The USB ports on the TBD are slow (13-22 MB/sec.).  I also noticed that if I have the Apple super drive connected it runs even slower (7-10).  Looks like the Super drive is consuming some amps. or the USB buss is setting speed based on the Super drive speed.  This defeats the purpose of having USB ports on the TBD.

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