I have several macs that I want to backup (create bootable clones). I can see how I use disk utility to restore to a hard drive and that works well, but one clone takes over the entire hard drive (Mirrors it). I would like to be able to create a file (? Disk image) of the bootable copy so that I can store multiple computer clones on the same HD. Is this possible? Do I need to use something like Chronosync or Carbon copy cloner?