I know it's possible to clone guest drive A onto guest drive B in a workshop computer where the OS is on host drive C, as I do it frequently and it works well. Drive C is on IDE0, drive B is usually on IDE1 and drive A usually on a Promise PCI\IDE card. But what I'd like to do this time is, in my personal system, clone drive D onto drive E where the OS is on drive D. Is this possible? - to clone a running, functioning drive onto a bare drive in this way? (Acronis True Image 8 is the cloning app. and is mounted on drive D, which is running XPP-NTFS) The idea is to back up my system drive, by simply cloning the entire thing onto another drive of equal size or bigger. The motivation is to keep the process as simple as possible, so that, in the event of a serious crash, the drives could just be swapped and the system back to normal within minutes. Comments would be appreciated.