I'm sure TRIM is not enabled. AFAIK, when Intel said TRIM is supported under RAID with their latest drivers, is when the SSD not in an array, while the controller is RAID mode.
for example, when you have two hard drives in RAID-0 or 1 along with a single SSD on the same controller, SSD gets the TRIM command. Not when the SSDs are in RAID. Before that, even though the SSD was not in an array, it didn't get TRIM command because controller is in RAID mode.
While the benchmarks show a huge improvement, since you are using it as a boot drive, are you seeing any improvement in performance? I didn't. I also had to RAID-0 because I ran out of space, and I couldn't anyone to sell my first Vertex2. But I think I should have gone with a single drive, even though SATA 3 SSDs weren't available when I bought the second drive.
one week later I've lost between 30% to 5 % read performance with more loss in smaller file size transfer while bigger file didn't loose much, write speed suffered a ~5% drop all accross:
Versus only 1 60gb vertex 3:
Small file size write are ~10% slower then with only one 60gb drive until you get up to 32k and above where its much faster Read speed is much faster at any file size.
1 60gb vertex3
*was on my AMD 1090t setup before I updated to a 2500k
So far I'm still happy with the way I went (2x60gb vs 1x120) and performance is still much faster then with one drive but on a daily usage its not really noticeable.
If someone who doesnt know much about computer was to ask me if he should get 1 bigger ssd or 2 smaller, I'd recommend one bigger to not have to deal with a raid 0 setup.