veri745

It was definitely the drive. It wouldn't mount on Windows either. Ordered a replacement drive that reads good in the same port. Preclear is running on it now

OK, another subsequent reboot seems to have resolved the issue. I'm still confused as to where that incorrect IP was coming from. 

So I pulled open my server's case tonight to swap out to all-new SATA cables and to move my pci-e SATA card to a different port.
 
I discovered something interesting that may point to a potential failure-mode that I've been experiencing:
My parity drive and disks 2 and 4, the disks that had errors on them, are in a 4-bay hot-swappable drive cage, and they're also all connected to my 4-port SATA card.
One of the molex power connectors that powers the hotswap cage backplane board had come loose, so it was being powered by only two molex connectors instead of three.
 
I'm thinking that under certain load conditions, there wasn't enough juice getting to the drives in that drive cage

Yeah, so you just need to populate the "container path" for "Home Movies", "Music", and "Photos"

Well, I ran a filesystem check in Windows.  It found no errors.
 
Plugged the flash drive back into my Unraid server and it booted successfully
 
Very Strange