Well duplication has almost completed finally so it appears it was either a bad cable/loose cable or possibly even dust. I am not ruling out the entire slot yet because I have not re-populated it yet with a new drive because at least 1 of the new drives I tried it in early is F'ed up now and only reads 700Gb capacity (even though it is a 3 TB drive). I am running the WD diagnostic tools on it in the hopes of recovering it but if it is bad then that will suck, especially since now that I am 1 drive short my server is maxed out on capacity.
I have some older 2 TB drives I can sacrifice and try to see if the slot is still ok but I don't want to put in a new drive until I know the the slot is fine.
