I've set up a RedHat server with RAID1, i.e. 2 mirrored drives (640Gb SATA), is it possible to "swap out" a drive weekly as a complete backup? I'm thinking something like:

D0: Always stays in the server
D1: Swapped out and replaced by D2
D2: Swapped out and replaced by D3
D3: Swapped out and replaced by D1

We've got it replicating (mySQL db) to an offsite server but we'd like to have a fairly current complete mirror of the server in the fireproof locally.