Including running Timemachine or any other such util on them. Sometimes people forget that you can treat these VMs just like any other machine and fix 'em or abuse 'em the same ways. I've restored complete OS's or just damaged parts using Ghost Explorer and just drag and drop what I need back to the drive. I do the same for VMs just by mounting the ISO to the same PE and boot to it and cut a Ghost image of the OS to a network resource. On a 'real' PC I stick my thumbdrive in a USB slot, boot to it via Easy2Boot (a SUPERB set of scripts that uses Greb4DOS to make booting damn near ANY ISO as simple as drag and drop) to Windows PE and back up / reimage or work on the drive. Yep, I treat the VM just like I treat any physical PC. I replaced it with a new drive, booted my OS X DVD, restored from the backup and an hour later (to borrow from Service Pro's motto), it was like it never happened.

Time machine proved itself to me when I lost my boot drive to a hard mechanical failure. PeterNosko wrote:Do you mean individual files on the VM? FWIW, I map the My Documents folder to a shared 'network' folder on my host and let Time Machine back up all my data files.