Why is my RAID1 or RAID10 virtual drive (6 SSDs) not significantly faster than a single SSD?
Your iometer results look to be consistent with what you were expecting. I think that the testing tool/protocol was the issue here, and that there's nothing wrong with your array. Be sure to use FastPath, though, as it really does improve SSD array performance...
The problem here is the write back feature of LSI controller, which only make sense for HDD´s. For SSD´s always use write through and no read ahead and DirectIO (even with RAID5). Then you see the expected performance with more SSD´s...