Unmounting "broken" NFS/SMB mounts safely
 

What do you do when the NFS/SMB server you have mounted becomes unavailable (server powered off, service stopped, etc.), you can't simply umount it. I usually use fuser, but it's no use on a mounted filesystem which has no PIDs currently accessing it. You can do force and lazy umounts, but it doesn't quite work either. Help!? :study:

Just a thought, and it's not pretty, but try doing a ps for smb. There should be something like mount.smb or similar. Trying doing a killall on it.

I'll look into it, and see if I can find out anything else to help you.