There's been a great deal of interest and attention from the media, customers, and performance enthusiasts on I-FAAST since its release last December in Diskeeper 10. I regularly read tech forums and blogs looking for feedback and new ideas for our products. I've noticed a lot of discussions on "how" this technology works, so to hopefully help clear things up, I'll describe a few of the parts that make it tick. The first part of I-FAAST is accurately benchmarking the performance of your file system. That is more complicated than it may sound as issues such as caching will quickly invalidate results if not properly handled. While I may gloss over this, it is quite complicated.