Currently Being ModeratedNov 3, 2011 11:45 AM (in response to Williamvv)
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."
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?
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.
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.