I was able to correctly backup and restore using any of my hard drives but for some reason one of my external USB2 hard drives changed Disk number (as shown in the Vista64 Disk Management program) from 'Disk 6' to another Disk number (not sure which). The drive letter, as seen in windows explorer has not changed, and the data on the disk is accessible. Since the this happened, when I try to do any backup True Image Home 2009 bringes up the error message 'failed to read from the sector -xxxxxxxx of hard disk 6'. Now significantly, the error mentions Disk 6, whichever drive I make the backup to, whether internal or external. If I ask it to ignore the error the backup remains at 0% completed and cannot be cancelled. What is it that TI is acually trying to save or retrieve from Disk 6 ?, as it is not the actual backup data (which I have on one occasion managed to successfully save and restore from another Disk, despite the Disk 6 error message). I have tried uninstalling and reinstalling TI (all my old backups were still available and working - so it may not have deleted the reference to Disk 6 either) but the problem remains. Any suggestions?