|RAID 0... Asking for trouble..|
With two drives use RAID 1 - aka mirroring... That way of one drive fails and the other is still intact then so is your data. A replacement drive can/will be "re-imaged" by the drive that didn't fail.
See this brief RAID description:
And even with RAID 1 or more system... wise to have it backedup as well to a stand alone disk, which is kept safe regularly updated.