I'll have to admit that it's been a few years since I've studied and compared disk defragmenter software. I've always just right-clicked my drive and let Windows defrag it. I've never really been impressed, however, with the results, even after running it three times.

After the first run:

After the second run:

After the third run:

So then I installed and ran PerfectDisk 8.0 which beats the built-in defragmenter software in many ways.

You can see the before:

and after of its run:

and then back to Windows to see its results: