It can take anywhere from 1-2 passes to 40 passes and more to complete. There is no set amount of defrag. You can also manually set the passes required if you use third party tools. Ho much fragmented was your drive?

What does pass mean when defragmenting?

Passes are the defragmenter going through your drive and defragmenting the data. It is defragmenting in stages. It analyzes, calculates its plan of attack and then does the defragmenting, pass is complete. Then it does it again.

How many times should I defrag my computer?

If you’re regularly loading, saving and adding to files and documents on a daily basis, your computer may need more frequent defragging than someone who only uses their computer a few times a week. For most normal computers, a monthly defrag of the hard drive should be fine.