Clearly more work has gone into the methods used to defragment the drive, but the performance gains come with a very hefty price tag. I did not enable the "Optimize Files" option because I didn't want it to clash with or degrade the I-FAAST facility, which represents half the cost of DK2008 Pro Premier. I suspect this may also account for the slower performance, but can't explain why I-FAAST would think that any of the files being tested are "old" or "slow". The top graphic shows the end result of all the tests, but the directories are still scattered around and the large clump of files at the end is presumably the result of I-FAAST moving older files to the end. I enabled most options in DK2008, including directory consolidation, InvisiTasking, statistics collection, and so on. Disabling I-FAAST provides the equivalent functionality of the $49 Diskeeper 2008 Professional, but even so this is one of the most expensive defrag packages available. Still, an average 21.8% performance improvement over no defrag at all isn't bad, but I expected much better from a program that costs $99. The only advantage is that DK2008 allows for automatic defragmentation. The performance improvement ranges between 12% and 30%, with better results obtained when the built-in Windows functions are employed "Optimize Boot" is enabled by default.
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