With 10.8.2 update, I decided to follow up by seeing if anything has changed using Samsung 830 SSDs.
Today, I tried USB 3.0 booting from an Samsung 830 SSD and I was floored. 12 second cold boot into Mountain Lion. But most importantly, I was getting Thunderbolt speed in the "real world."
Then I ran some benchmarks.
305 MB/s Write on average and 400 MB/s Read.
Thats right. 300/400 MB/s. I still could not believe it so I booted into a few different installs of Mountain Lion 10.8.2. I even tried another Samsung 830. I ran this test 4-5 times with different configuration to see if there wasn't a fluke.
I discounted BlackMagic's speed test and monitored the Disk I/O the Activity Monitor. As you can see, copying and reading 50GB of tests, you can see it reading 400 MB/second. OK, BlackMagic wasn't acting weird.
A 30 GB ( 29.31 GB VMDK to be exact) took 1.33 seconds to copy.
To do the math. It definitely corroborates the benchmark. According to my calculator, it wrote at 300.56048 MB/second in real time. This is not a synthetic benchmark but what you will actually get in the real world.
After reading all of this and you still don't believe me?
I did a video on my iPhone.
There you have it. This may be the fastest USB 3.0 to SSD adapter setup on a Mac and even PC (unless you have a new rare Gigabyte motherboard with UASP USB 3.0 controllers). These test were done using the Samsung 830 SSDs.
The Blac X 5G is smoking fast with UASP. It appears to have an ASMedia 1051 controller.