Microsoft disk defragmenter

[Potatoman]

I always thought that defrag should re-arrange your files for best performance. When i finish "defragging", the graph is blue with no red (as it should be). Why are there like 3 seperate blue blocks? Shouldnt there be one big continuous one?

[charlieroker]

I am assuming this three blocks are being seperated by another colour?  If this is the case it may be because the files in the space are immovable.

[CleverClogs]

If you have an operating system (in my case windows XP home) pre-loaded to your hard drive as I do. The Op/Sys files are stored on your hard drive as an unmovable set of files. The ones you are looking at probably include these files, among others that also will never be moved or deleted..... That way if you ever need to erase your hard drive, the Op/Sys can be retrieved from exactly where it was factory stored.....

[mikeyp]

The most probable explanation is not the green "unmovable blocks", its just that the blue doesnt need to be together. If the entire thing is blue, it means no files are fragmented. This does not mean that all files are crammed to the same place in the disk. It doesnt matter. The only time fragmentation will noticably slow your computer down is when a single file is spread across the disk. Having one file somewhere different to another does not matter.