Im about to re-install windows XP PRO onto my system and I would like to Know the best way to partition the system? Im aiming for performance as well as data security. The system is running 4 SATA hard drives. Two of the drives are normal and the other 2 are running Raid 1 which mirror each other. This is how i plan to re-install windows XP: Disc 1 - non raid C: Windows XP D: Documents and Settings Disc 2 and Disc 3 - Raid 1 Mirror E: Paging File F: Program Files G: Data Files ( My documents, My pictures, My music) H: Downloads Disc 4- non Raid I: Norton Ghost Backups & Backups - I chose to keep the "Document and Settings" folder separate from my data files. From what ive seen, most viruses tend to end up in this folder (temp folder , internet folder) - Paging file on first partition of second Disk for performance. Separate from XP. - Program Files on second partition of disk 2 for performance? and more importantly if windows crashes, I still have my program files info. I.E. Which programs I have installed and my customized user settings for each program. I understand that on OS re-install the programs wont function but it should be possible to overwrite the program settings after re-installing the programs. - Data Files such as my documents and my pictures on the second drive as its Raid 1. Should one drive go belly up, the documents will be safe on the mirror drive. - Downloads on a separate partition to data files in disk 2 just in case i download some virus and nasties. - Backups on their own dedicated Disk as Norton Ghost images tend to be Big Files and also to be independent from the system and data files in case of problems. What do you think? and how would you do it differently?