@softraid-support So I don't have Disk Warrior but I ran Disk Utility First Aid over the volume that has the error on startup and there were some di...

Happy New Year Support! WRT the "IO error upon restart" issue/p> I ran Verify on the disk in question twice. Both times it said all sectors are r...

@softraid-support Thanks kindly!

Any other thoughts about?

@softraid-support yes, I reset the error counter each time, so it is a new error upon every reboot.

Since switching to the beta (b42, b43) and Big Sur (11.0, 11.1), I get a single I/O error warning immediately on boot after shutdown or after restart....