I have a Win 7 system that is strictly used as a back system. It has a 1TB, with the OS installed, and two 500GB drives that I set up as a spanned volume. What I would like to do this weekend is a complete reinstall but convert all the disks into a single spanned volume. This would allow me to do a back from my other system onto what would be seen as a 2TB single drive. Is it possible to install windows to a spanned volume and if so, how do I format the drives before the install? Or can the existing system be expanded to form a single spanned drive? If I cant do this, could I partition the 1TB drive into a small partition with the OS on and extend the remaining into a single spanned drive?