Yes of course it's well understood, thank you. I can actually put a duplicator to good use for reasons beyond my unRAID server. I am considering building a second server as I mentioned, but I have thought of just cloning all the current drives and keep those drives off-site as well for safe keeping.
On another note many years ago I used Arcoide DupliDisk hardware to mirror/duplicate HDD's on the fly in quite a few PC's and servers. If I remember correctly the servers ran Raid 5 with 5 DupliDisk controllers and a total of 10 HDD's. I wonder if this method would be overkill for an unRAID server?