I recently bought this raid card from Amazon: http://www.amazon.com/gp/product/B001IHYLTK/ in order to store a movie base that I could access with XBMC. I was hoping to buy 4 refurbished 2tb hard drives so I could get 6tb of reliable hard drive space.
However, I may have jumped the gun because I don't know all that much about RAID. I'm familiar with the concept that that with 4 RAID'd hard drives, you get the space of three of them with the advantage that any one can fail and you don't lose any data. But what I'm not sure of, is if I have the get 4 of the exact same hard drive or not and if there are any other subtleties that I should be aware of. And more generally, is this going overboard? Are there other ways to do this that would be simpler?