Back in the 90's I did lots o' application performance tuning and now I find myself entering that realm again at a new firm after many years away. So I am considering my strategy given the improvements in hardware. This site's storage is based on DS8100 (3390 mod-3's). Is there still much value in buffering to avoid physical i/o's? Or is the return minimal given the speed of the underlying physical storage? And if the return is seriously negligible might software cost savings be realized by un-installing data optimizer/buffering-type software?