Multiple hard drives via RAID are for near-line data, performance, or redundancy in case of failure. It is not a backup strategy. If you still want to proceed with this, you sound like you want RAID 1 (mirroring) with hot swap (swap drives in and out) and auto-rebuild (rebuild the data set on blank drives going in). You'll need to mirror all your current disks.
There are certainly a bunch of NAS consumer products that can do this. Requiring Tbolt will limit your options in terms of product choice as it's more Mac centric.
Last edited by Hack&Lube; 08-07-2013 at 01:06 PM.
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