This morning I noticed all my shares were gone.  The Array appeared normal but when I looked in the Unassigned Disk Devices, every disk showed up in there as well.  My parity check showed complete with thousands of errors.  I pulled a diagnostic, I'm not sure what that will show but it's attached.  I then rebooted and started the array and everything was fine.  The array didn't auto start like I though it normally did, but I may have disabled that, I'll have to double check.  Everything seems normal now but I have no idea if my parity is actually valid or not.  Hoping someone smarter than me can tell me what's going on here.

unraid-diagnostics-20250204-0446.zip

It's not logged as a controller problem, so possibly a power/connection issue, check all connections and try running another check, also, any power splitters in use?

No power splitters are used, most disks are in a NetApp disk shelf and a few are in the drive bays of the server. Both the Server and the DS have dual power supplies.  I'll run it again and see what happens.  I'm not sure why all the logs weren't there, the syslog was empty and the syslog.1 only went to the 1st of the month so I'm missing any information on what actually happened.   I'll go ahead and mark this as complete since everything at the moment is actually working, if I have issues again I'll open a new thread.

11 hours ago, meat said:

The Array appeared normal but when I looked in the Unassigned Disk Devices, every disk showed up in there as well. 

This is what happens if the drives temporarily disconnect, and then reconnect (thus getting a different ID assigned).  Unraid is not hot plug aware so does not handle this.

I think in this case that might not have been the case since everything was working up until right around the time the parity check completed, which took 4 days, but during the entire parity check you'll see that there were errors from the start.  Maybe it's unrelated.   I'll re-check and see what happens.