Previous 1 2 Next 21 Replies Latest reply: May 21, 2014 3:48 PM by Leonard Barshack Go to original post
  • Williamvv Level 1 (5 points)

    My comment above was incomplete.  Here's the revision: "And also noting that the speed from the MBA to external disk thru TBD USB has just about doubled by installing the Thunderbolt Software Update version 1.1.  Other speeds didn't change much."

  • nikolay51 Level 1 (0 points)

    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 Level 1 (10 points)

    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 (0 points)

    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 (10 points)

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

  • tbirdvet Level 4 (2,880 points)

    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.

  • Leonard Barshack Level 1 (10 points)


    Thunderbold Display

    MacBook Pro Retina

    Plugable USB 3.0 SATA Hard Drive Lay-Flat Docking Station (Latest ASMedia ASM1053E Chipset)

    Seagate Barracuda 3 TB HDD ST3000DM001



    Disk Speed Test by BlackMagicDesign


    Plugged directly into the MacBook:

    Write/Read:   165 MB/s  172 MB/s


    Plugged into the Thunderbold display

    Write/Read:   7 MB/s  12 MB/s


    A difference of almost 20-1 !!!!

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