Internally the QuadFather has 4 drives:
1 - 300 GB Boot and Software Drive
1 - 300 GB Rendering/Temporary Storage Drive
1 - 750 GB Production Drive - all projects are done to this drive
1 - 750 GB Video Capture Drive - all video is captured to this drive and stored here - enough run for about 60 tapes at a time.
The external removable drives are used for nightly backups using Norton Ghost which has proven itself reliable over 10 years or more:
1 - 500 GB Drive backs up the boot drive and the rendering/temporary drive
1 - 1500 GB Drive backs up the Production and Video Capture Drives.
When I go out of town or something like that I take both removable backup drives out, put them in static bags, and then a lead lined soft case and they come with me. That way all the data is protected. PC's are cheap, but the Data they hold is priceless. Try and explain to your customers you lost all their data and see how much more business you get from them. If you do this for living a backup strategy is very important.