Backing up important data is always crucial, or at least IMO keeping it off your main HDD. I have a 750GB I have split into 3 partions for three different OSs and a 1TB I use for mass data storage such as Videos, Music, Etc. The nice thing about this is if say one of my OSs happens to get a virus, become corrupt, or some how I just really messed stuff up a reformat isn't all that big of a hassle, just a 30min drop in the bucket. In any case glad to hear everything is back in order.