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Things to note regarding virtual machine backups:
- Mac: time machine does not backup virtual machine files.
- A virtual machine image is actually comprised of several files. All of those have to be in sync or behavior is erratic.
- From outside the virtual machine (host machine), if a backup is made when the virtual machine is running, the results are inconsistent. Backup your virtual machine files on the host machine when the virtual machine is not running.
- To backup virtual machines using Mac OS X 10.5's Time Machine, users will need to be running Mac OS X 10.5.2 or later. When backed up using Time Machine, virtual machines are duplicated and may take up considerable space on your backup drive.
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