or did you mean just use a large capacity RAID setup? that will probably work fine for a lot of situations but it can expensive and introduce more latency for certain types of operations (but that might not matter, depends on context).
It's a server, you don't put databases on non RAID drives anyway, that'd be silly as the loss of a single drive would lose all your data. RAID setup isn't an option, it's how things are done by default for servers in order to ensure redundancy against a single disk failure.