I want to raid two 30 gig drives, but currently one of them is my primary drive with 8 gigs of info that I absolutely cannot lose. Is there any easy way that I can back up my data? I have an rw but it'll take 12 700mb discs to back up all my info! If I don't back it up the data will be lost when I raid the drive, right? Any GOOD compression tools that'll save me 7 gigs?