I am going around in circles trying to figure out a SAN solution to store my SQL data. The FAS270C is a solution we are looking at, but the vendor said all the drives are RAID 4. I looked this up and it seems like performance is not better than RAID 1 or RAID 5 and maybe worse in some cases. Does anyone have experience with RAID 4 or can give me some insight as to if I should stay away from this or if this FAS270C with RAID 4 will be really fast as the vendor is saying? Thanks.