Seems that during the backup one of the RAIDs failed which made it hang up, on rebooting it is also hanging so I am in the datacenter checking it now. This is the only server impacted, as it is a direct hardware node.
Got the server up, will be doing a RAID rebuild tomorrow night hopefully in an orderly way with a brief maintenance, as there is also a chassis fan that is out and needs to be swapped.
OK, Windows is back up for about 15 minutes now and IIS was up but I did not post as I turned it back off to ensure all was good. At this point the IIS is up, the RAID is in rebuild, and the server is in a good state, but not yet optimal until the RAID rebuild is done.