I let defragmenter defrag my data partition over night and when I woke up it was on pass 5 and 25% done. I stopped it and the partition was still 81% fragmented. I don't recall the exact % of fragmentation before I ran it, but it was 80something, possibly 81%. Anyone have any idea why this is happening? The partition is 496 GB 57.6 free. The Windows partition has 46 GB free (I don't know if it can use that space on another partition to move stuff around).