I have determined what I need to do to get the iomemory drivers (for flash card on main server with NFS home directories, web server, and flash drive) with the 5.14.0 kernel.  So I am going to be taking things down in about 15 minutes, between about 12:15 AM and 1:15 AM or so September 2nd.  Everything will be unavailable for a short while during reboots.