This thread has really brought a lot of interest. I never used to "validate" a backup until I read this thread. I have done many restores. I have become so sure of TI 9.0 that I don't even try to fix a problem anymore, I simply restore to my last "Image". I have been validating ever since I read this thread, from both windows and the Rescue CD and no problems. I have an internal backup drive and two external USB HHD drives ( different makes) and everything validates. My motherboard, cpu and bios are closing in on 4 years old. Maybe this has something to do with my excellant results? I have approimately 14gigs used on my "C" drive and this backups in about 7 minutes ( from windows and the rescue CD) and restores in about the same time.