@trans am...
try using iometer or crystal bench mark. also everest is a pretty good tool for latency testing. also the winsat disk test within windows is about the best imo.

elevate a cmd prompt to admin status. then when cmd box opens up type in:
winsat disk

that will give ya some good numbers there. most of your numbers up there are cache, as gullars points out. atto is trash anyways dont even bother.