The following log (actual site name and spurious information removed) shows the nfsbug problem I have encountered with file systems left mounted. Dispite that claim that nfsbug never actually mounts a file system, it appears that the remote host believes that the file system was (and still is) mounted! BEFORE THE TEST: ========Testing showmount -ade a.b.c.d a.b.c.d:/var/spool/mail b.b.c.d:/var/spool/mail b.b.c.d:/usr/local c.b.c.d:/var/spool/mail c.b.c.d:pA c.b.c.d:/var/spool/mail/msgs ... THE TEST: ========Trying nfs bug - no handle guessing (takes too long from here) RPC: Timed out RPC: Timed out RPC: Timed out RPC: Timed out Connected to NFS mount daemon at a.b.c.d using TCP/IP Connected to NFS server at a.b.c.d using UDP/IP Failed: /var/spool/mail: Permission denied Failed: /var: Permission denied Failed: /usr: Permission denied Failed: /usr/local: Permission denied AFTER THE TEST: ========Testing showmount again all.net:/usr/local all.net:/usr all.net:/var all.net:/var/spool/mail a.b.c.d:/var/spool/mail b.b.c.d:/var/spool/mail b.b.c.d:/usr/local c.b.c.d:/var/spool/mail/msgs c.b.c.d:/var/spool/mail c.b.c.d:pA ... This problem seems to occur about 1 in 30 times nfsbug is run (very approximate). Could it be that an RPC to dismount failed and some file systems believe that there was an actual mount? Why does NFSbug not tell us of the success? At a minimum, it should say something like - I mounted it, but the dismount calls timed out - this is very dangerous - no? FC