Symantec's [http://www.symantec.com/business/backup-exec-system-recovery-serverdesktop-edition Backup Exec System Recovery] (BESR) allows full system backup and restore (virtual and physical)from any hardware with restore to dissimaliar hardware. Conversion from P2V or V2P can also be scheduled. Install BESR on all windows computers connected to HDA and route backup to a folder on the HDA. Remember to set permissions on destination folders. Activate VSS copy so any open files are captured, optional threatcom threatcon can be used to trigger a backup if a threat becomes widespread. Alternatively BESR can be installed on a central windows machine with agents deployed on all other windows and Linux machines and using the new Linux media server agent (replaces RALUS) backup directly on the Linux HDA. This way you maintain a catalogue of all backups and can trigger them from a central console.BESR is the enterprise windows standard for Backup and restore. Norton the consumer brand of Symantec have "Save & Restore" I'm not overly familiar with this product but it replaces Norton "Ghost" in most markets.[http://www.symantec.com/norton/save-restore] the GUI is exactly the same as BESR.