Obscure hardware issue, Invalid plot header magic

[codinghorror]

Yes, I had a similar experience here:

Can Chia plots "go bad" over time? Mine seem to!

OK so this is weird. I know I have done the work on this one, so bear with me. I recently scanned EVERY drive in a datacenter hosted JBOD with the following command: .\chia plots check -n 5 -g C:\mounts\hd01 … just to make sure all the plots were good. That 4U JBOD has a number of drives, you get the idea, like C:\mounts\hd01 C:\mounts\hd02 etcetera. Real standard computing stuff – Windows, Mac, Linux, basic drive mount points on any OS. That 4U JBOD is driven by a 1U brain server. So, I …