Defragment and optimize your disks even on schedule, with Smart Defrag
Smart Defrag will help you to defragment the hard drives.
The program automatic defragmentation in the background and is specially designed for modern, large hard drives.
Ability to place the frequently used files and directories into the fastest area of the disk.
Ability to decide when and how to start defragmentation.
Note that Smart Defrag comes with the Yahoo toolbar, which you can choose not to install.