@Greg_E said:
I have two NAS normally connected, an ISO and NFS connection on each. One of the servers is powered down for construction, but I did not disconnect it from the hosts. Could this severed connection be the reason why my updates took so long, something around not being able to purge or drain the state before the reboot?
Don't look further, that's exactly the issue. Reboot would have occur in the end after 30 minutes (timeout) and all other operations will be extremely slow.
You must disconnect a SR for maintenance, otherwise you enter in a world of pain.