I'm getting ~336MB/s read, ~363MB/s write on a SAMSUNG 830 Series MZ-7PC256N/AM 2.5" 256GB SATA III connected via the Seagate GoFlex Thunderbolt adapter to a 2011 Macbook Pro:
I wouldn't be surprised to see ~450MB/s or 500MB/s with a Vertex III Max IOPS instead of the SAMSUNG 830 256GB, but I don't have one to test.
One thing that surprised me is how hot the SSD gets... I am connecting the bare drive to the adapter without any case and thought the SSD would stay cooler than a spinning drive, but if I use it extensively it gets almost too hot to touch.
I purchased my GoFlex thunderbolt adapter together with a GoFlex FreeAgent 500GB HD. It is model ST9500420AS, which is a 3Gbs drive.
When I look (2011 iMac) in my System Information under the Serial-ATA section, I see "Unknown AHCI Controller" with the GoFlex 500GB disk under it. What concerns me is the Negotiated Link Speed of only 1.5 Gigabit. Link Speed is 6 Gigabit, but that's not what it's using.
I purchased but not yet received a SSD that I want to put into this thunderbolt adapter, but now fear it will be hindered with a 1.5 Negotiated Link Speed.
It shows AHCI version 1.2, whereas my main 1TB internal drive shows AHCI version 1.3 and it's negotiated link speed is 3 Gigabit.
Anyone know why the negotiated link speed is only 1.5 Gbs? I'll look at this again when my SSD arrives.
This 2011 iMac has been a big disappointment for lack of stability and lack of high speed interfaces.
