Wow, is this list ever fast. Thank you very much everybody.
I asked how to forcibly unmount a no longer avialble NFS share.
It turned out the real problem was not that the remote NFS
server was not running, but that there was a local process
still active at the mountpoint.
There were two main routes suggested:
1) use 'lsof' (list of open files) to determine which process
has an open file descriptor in the mount location.
lsof is a 3rd party program, downloadable from
http://tru64unix.compaq.com/demos/ossc-v5.0/rpmhtml/lsof-4.43.html
2) 'fuser -c <mount-point>' will tell you the process ID's
of any processes using that mount point. Then kill them and
umount -f should work.
fuser is a native Tru64 app.
One respondant was liked lsof better because fuser's output
is "not very readable".
I tried the lsof route first and that worked (the offending
process was Samba. The mount point was a couple of levels
inside a Samba exported directory).
And as a last ditch effort, one could always take this advice:
"Given you've already trashed your system state by
killing off important processes, why not just reboot?"
Which I also did anyway to test my init scripts. Good thing
to because not everything autoloaded like I hoped it would. :)
Thanks again to BrianH, Alan, Dr. Thomas Blinn, John J. Francini,
Oisin McGuinness, and Sean O'Connell.
-matt
========================================
Matt Wilkie * GIS Technician * Yukon Renewable Resources GIS
http://renres.gov.yk.ca/pubs/rrgis/
> How do you forcibly unmount a (no longer available) NFS share?
>
> I was testing out a time limited demo Windows NT NFS server
> and neglected to unmount the NT share from our T64 box before
> the demo self destructed.
>
> -The NFS server on the NT machine is no longer running and
> cannot be made to run
>
> -'umount /var/www/htdocs/maps/rhino' does nothing for a
> lengthy period, periodically reporting:
> "NFS3 server rhinoceros.gov.yk.ca not responding still
> trying"
>
> -'umount -f /var/www/htdocs/maps/rhino' tells me :
> "/var/www/htdocs/maps/rhino: Device busy"
>
> -'mount' output:
> root_domain#root on / type advfs (rw)
> /proc on /proc type procfs (rw)
> usr_domain#usr on /usr type advfs (rw)
> usr_domain#var on /var type advfs (rw)
> data_domain#local on /usr/local type advfs (rw)
> data_domain#gisdata on /data type advfs (rw)
> rhinoceros.gov.yk.ca:/d/maps on /var/www/htdocs/maps/rhino \
> type nfs (v3, rw, udp, hard, intr)
>
> I killed the following processes:
> nfsd
> nfs* # nfs process which I don't remember the name of
> rpc.lockd
> rpc.statd
>
> Does the "device busy" message indicate there is a local
> process using that dir? How can I determine what that process
> is?
>
> -name -a'
> OSF1 tarantula.gov.yk.ca V5.0 910 alpha
>
> thanks in advance,
>
> -matt
Received on Fri Jan 12 2001 - 22:38:05 NZDT