Diagnostic file uploaded.
I tried removing a pool drive and re-add it, which changed the error message to "Wrong pool State. Too many wrong or missing devices" from "Too many wrong or missing devices"
tower-diagnostics-20250131-1538.zip
After updating from 6.12.14 to 7.0.0, the raid refused to start complaining about too many missing devices. After banging my head on the desk after checking that no hard drive had failed, I rolled it back to 6.12.14 and everything was fine.