Resolved: PHEW.
Unmounted array, remounted in maintenance mode. Than ran file system check on each drive. Then restarted server. I first tried just remounting the array not in maintenance mode, and that didn't work.
Before doing the file system check, I tried unmounting and remounting the array and rebooting, neither worked. I also tried remounting after the file system check and that didn't work either, I had to do a full reboot.
Pages used:
https://wiki.unraid.net/Check_Disk_Filesystems#Checking_and_fixing_drives_in_the_webGui
https://wiki.unraid.net/Check_Disk_Filesystems