Eric,

        You can't delete domains with nodes defined in them.  If you do the
delete and it doesn't' complain, you're OK.  If it complains, you could do
"q n do=domain-name" to determine the nodes.  You could then "q fi
node-name" to determine the filespaces.  You could then do other
investigative commands (hl_name, ll_name, backup dates, etc.) to determine
the validity of the data.