I am currently running Vista Home Prem. on a RAID 1 (mirroring) array. I am thinking of purchasing the three pack of upgrades to Win 7. Will I have any trouble upgrading with the RAID in place? My other option is to break up the RAID array do a clean install of Vista, THEN UPGRADE TO Win 7. As Win 7 Home Premium has a system image utility, I would just use the second drive for backup. I have never had to restore from one of the Windows system image utilities so confidence is not great.