![]() 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. " Office Auto" is the result obtained by allowing Windows XP to do its own defrag after enabling both "Optimize Files" and "Optimize Boot" functions.This performance improvement of 16.7% is not as good as was expected, and slower than "Office Auto". " I-FAAST+Auto" is the result obtained after enabling and "Optimize Boot" functions in Windows, and then running DK with I-FAAST enabled.A 30.7% performance improvement has been measured, the best result so far, but only 3.9% better than "Office Auto" below. ![]() " Full Defrag" refers to the read time of all 802 test files after several reboots and several passes using the DK program, with no I-FAAST or "Optimize Boot" options enabled." Basic Office" refers to the read time of all 802 test files, where no defragmentation has been done whatsoever, after the installation of Microsoft Office 2007 Professional (Trial)." XP+Auto" is the result obtained after enabling both "Optimize Files" and "Optimize Boot" functions in Windows, and then running WDD, i.e." Defrag+Auto" refers to the read time after enabling "Optimize Boot" functions in Windows, and the I-FAAST option in Diskeeper.A 12.8% performance improvement is measured, almost identical to the WDD result. " Defrag" refers to the read times of the same 710 files, after several defrag passes using the DK program, with no "Optimize Files" or "Optimize Boot" options enabled." Basic XP" refers to the standard install, without Office 2007, so there are only 710 files to be tested. ![]() The first test is at the bottom, and shorter lines mean faster times. The graph shows Diskeeper 2008 Pro Premier (DK) in dark blue, and the results from Windows XP in light blue. Once more I am at a loss to explain why only one of the tests achieved a result 3.9% better than WDD, or why the final I-FAAST test caused a slower result. A quick summary of the results: the $99 Diskeeper 2008 doesn't always work as well as the free Windows Disk Defragmenter ( WDD) supplied with Windows XP, and only marginally faster than DK2007. The benchmark results of Diskeeper 2008 Pro Premier are available in a spreadsheet.
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