Ok, here it goes. This weekend I have decided to reformat my hard drive. There have been a lot of wierd little things happening lately, and I can't take it anymore. I get black lines over icons, and when the dock zooms over an open finder window, it leaves half of the icons from the dock on the Window. I am only working on my iMac this weekend, and will leave the iBooks for the following two. Now, here is my question. I have never really gotten deep into partitioning. I have an OS X partition, and a 9 partition. The only reason that I have 9 at all is so that my daughter can play her games on the computer, because they are all 9. What I need is some advice on partitioning for optimal performance. Here is what I use. In OS X. Office v.X, iApps, Virtual PC, and tinker with Photoshop. I have over 4,000 mp3's and *cough* a lot of videos. I never use nine for anything other than my daughters games. I want to also have it ready for Jaguar when it is released. Should I give the mp3's their own partition? What about the vids. How complex do you get with your schemes?