My primary drive is a 150G WD Raptor Drive running windows XP. I wanted to be on the safe side and clone this drive so I could have a backup of it should anything happen to it. I bought an identical 150G WD Raptor drive in order to have a seamless copy. I have this housed in an external sata case that is connected via USB 2.0. When I tried to clone this drive using Acronis it would never complete the task. I read the help menu and it seems that it cannot clone an active drive? How can I clone my primary drive so that I can have an identical backup of it? Thanks in advance for any assistance.