Question: I ran defrag on my Windows XP box to hopefully speed things up, but it still left quite a few files that are fragmented. What gives?
Answer: Defragging your hard drive should be like giving your car an oil change and dropping a can of octane booster into your gas tank. It should speed things up and make your system run smoother.
What gives is that the built-in Windows defrag program completely sucks. It's slow and doesn't do a very thorough job, as you've seen first hand.
The story gets worse with Vista, and the built-in defrag utility doesn't even show the graph anymore, so you can't even see how many files are still fragmented. I guess Microsoft decided it would be better to not even show people how ineffective the defragmentation program is!
You'll get much better results from a third party defrag program like Diskeeper, and better system performance too.
Diskeeper just released their 2009 version, and you can download a free 30-day trial to see what a fully defragmented hard drive really feels like. I ran it on my 160GB hard drive that's half full, and it took less than 30 minutes to defrag it - much faster than the hours it can take for Window's defrag utility to run.
I like that you can see a graph of the files on your system, so you can visualize the defragmentation of your hard drive. Here's a screen shot of my hard drive after running Diskeeper 2009, showing blue for files that have been defragmented and red for files that are still fragmented (you'll have to look hard for any red lines):
Wondering what file fragmentation means, and if it can affect your system's performance?