This server is my backup undraid server, so the drives in it are from the main server. When I upgrade a drive for more capacity, they go in the backup server if needed.
This is the third drive I've used as a parity 2 drive in this server, but it did live it's entire life in my main server before being tasked as a parity drive. The other drives are older, but this is the only one I've had "fail" repeatedly. The Reported uncorrect count hasn't gone up in a long time, but this drive randomly has errors, then it'll be fine for a long time. 150 days at this point.