I have heard speculation on Adaptave and Always Read Ahead... Always can be faster in most sequential read situations (Storage Drive), whereas Adaptive can be better for more of a staggered read situation (OS Drive)
Always Read Ahead will boost your benchmark scores but Adaptive can help with multiple file reads However, Always will always read ahead to the next stripe and cache it, so if you have data the drive needs to seek elsewhere on the drive, its gotta flush that cache and seek it elsewhere. It makes for very very fast sequential reads and is detrimental to random reads.
6.2 gave me gains of around 50 MB/sec read. It is very worth it. I was only able to get it to flash using the Windows Binary and the command line tool manually via DOS. UNIX has a similar one I believe, haven't tried it though.
OK, i'll try the fw upgrade and feedback as soon as done .