Seriously whoever told you to set up raid 0 needs to be bitchslapped.
Read up on
how Raid works and you'll see why.
At the very minimum you should have 2 drives that use raid 1 (mirror) and then still backup regularly.
Hard drives are cheap if you data is worth saving you'll put a better plan in place.
Also when you set up the raid it pays to buy spare new drives at the same time because if a drive takes a dump on you in 6-12 months time that same model may be no longer available and rebuilding you raid array will be next to impossible depending on your raid controllers capabilities.
If you don't do your research and have a fallover plan in place before it happens raid can actually lead to you losing everything.