A striped set created by NT is initialized during the boot process. The information about the striped set is stored in the OS, not the disk. It sounds like you are planning to upgrade your OS, make sure you try an UPGRADE. However, I did notice 2k/xp will not let you include the boot disk (not just the boot volume) in a software stripe, so hopefully you have at least 3 drives. If you do a fresh installation you will probably never access the data again. You would have to gather info on the stripeset before and then redefine it in the registry. I wouldn't count on that.