Right now I have XP Pro,XP Pro, and Vista Ultimate installed on 3 partitions. All of the space on my hard drive is allocated by these partitions. The partitions themselves have plenty of space to play with. All of this is on 2 320GB Hdd JBOD. So my question is, can I set up a raid 0 without losing my installed Operating systems? Thanks Mark Edit: I have Acronis Disk Director Suite and True Image ( I didn't know if that mattered).