Hey Guys, Today I received a pair of 120GB Mercury extreme Pro 6G SSD drives which I was planing to setup in RAID 0 in my 4,1 MacPro however one of the drives fails to show up in Disk Utility. After spending the day trying to get it to work I decided to just install on the one SSD which I was amazed at the performace gain. I was planing to send the faulty drive back for a replacement and use the one drive utill the new one arrives when I came across this: Source I know I'm not using a host adapter and that my system is not capable of taking advantage of the full 6Gb/s so its not a direct comparison but does this mean theres no extra performance from a second drive? I'm just trying to work out if I should get a refund or a replacement for the faulty drive. Cheers.