SSD’s are so fast that if you use more than one SSD(which you have to for ANY RAID) you may just hit a wall due to the RAID controllers not being fast enough to keep up. What’s interesting is at one point they went to purely software RAID and saw the kind of speed increases they knew they should have been seeing. RAID cards used to be a bottleneck but they got much much faster than any magnetic drive or groups of magnetic drives could get to…now they are once again the bottleneck. I wonder how long it’s going to take for the RAID card manufacturers to catch up?
Here’s a three part article about SSD’s from an enterprise point of view. It’s a good series. Part 1, Part 2, Part 3. The author has other articles as well here, here, here.
SSD versus Enterprise SAS and SATA disks – AnandTech :: Your Source for Hardware Analysis and News.