The renewed hard drives that I bought have a "power save" feature and required me to use a special SATA power cable that I guess bypasses this feature. This was included with the HDD, but I didn't consider that it was needed until I read reviews on Amazon. I was able to find the disk and am re-building my parity with the upgraded 10TB HDD!
I am replacing a 3TB WD HDD with a 10TB HGST HDD (renewed from a data center pull, mostly likely). I stopped the array, removed the original parity drive and replaced with the larger 10TB drive. When I restarted the system, the new 10TB is not showing up as assignable and my system doesn't seem to recognize it. I tried a 2nd 10TB HGST HDD (bought from the same source) and that doesn't show up either.
Here are the drives that I bought in case that matters: https://www.amazon.com/dp/B07DPKWLJR
I bought 5 of these HGST 10TB drives to upgrade my system - not off to a great start!