Defraggler ate HD space?

[Mikepsyche]

I started defraggler today around 9: 30, came home at 11: 45. It said it was 74% done, only there was still 35 gigs of fragmented space out of 44 it had started with.

It also said there were 50.1 gigs of free space on the drive, and I had started with about 61. What happened to those 11 gigs?

 

[Lexluethar]

It takes some space away during the defragmentation process to move files around. This is why it will suggest you have at least 15% empty space on your hard drive before defraging. So it takes that space away in order to move files around.