Thanks for posting this, really helpful. I had no idea the 9240 card was not a "true" RAID controller. Makes me wonder what the point of it is. I will be sending my 9240 back to the supplier and will order a new card, maybe the 9270-8i. Did you order the battery and a supported SSD for caching? I've heard that the battery pack boosts performance considerably.
Thanks for posting, helped me out a lot, I've spent 2 days pulling my hair out on this!