Valid plots no longer valid after crash

[jiblankman]

New build generated the first three plots overnight. I checked the plots using "chia plots check" from the cli and it reported 3 valid plots. Another completed shortly after. There are four .plot files on the hdd.

The computer froze, I have no idea why. After reboot, the four .plot files are on the hdd but are not found. "chia plots check" reports "Found 0 valid plots". Nothings shows up in the gui under the plots tab.

What happened? Why are these plots suddenly no longer good? This was an initial setup, as follows, and I have 15 more hard drives to install. But if the work becomes garbage after a crash, I think I am returning the drives.

OS: Ubuntu 20 on SSD
Temp Disk: 2 TB U.2
Hard Disk: 12 TB

Any help would be greatly appreciated. Thanks.