VM installation suddenly have disk issues with "Failed to write entry" errors!

Tonight, my VM installation on Unraid went bonkers. Updates wouldn’t work and the overal system was complaining and throwing errors. Looking at the console, I saw “Failed to write entry” errors.

I’ve had issues with an installation being corrupted so instead of debugging it, I just recreated a VM and pointed it back to the same vDisk. That usually has worked.

After I did that, the system came back up after the obligatory long wait, and everything seemed fine. However, now I’m back at the same issue… same errors:

What the heck is going on?