I think part of the problem with SAN pools is the inherent disconnect between how network guys setup disk arrays and luns on these devices and how database people want to use them. The more I've learned about our SAN setup at my current company the less I wish I knew. Network guys seem to like making a few RAID arrays that are ginormous and then carve them out into what will be many "drives" that the OS sees. Of course with the same array serving multiple purposes for the same or multiple servers there's going to be odd contention and sub-optimal configuration. I had a network guy tell me that our RAID 10 arrays were only using 2 physical disk drives, at which I just walked away rubbing my forehead in disbelief.