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#11
With nowadays harddrive speeds I believe your defragmentation level could even be higher than 50% before you notice anything.
7200 rpm that means the next block to read passes the head 120 times per second. Ive never seen a defrag improving anything. With that being said, I stick to W7 defrag which runs automatically every Wednesday night (or so) and if I check manually it tells me it's all good
-DG