Re: odd problems umounting nfs filesystems (fwd)

Tony Broughton (
Wed, 4 Sep 1996 12:11:00 +0800 (WST)


We run a ISP in West Australia, and have been experiencing exactly the
same symtoms with umounting the file systems, be interested if anyone has
a fix.


Vianet Communications

On Tue, 3 Sep 1996, Lindsay Haisley wrote:

> "Thus spake David Monro"
> > Date: Tue, 3 Sep 1996 10:42:11 +1000 (EST)
> > From: David Monro <>
> >
> > Hm - I am having strange problems when I reboot my system - umount seems to
> > hang when unmounting the nfs mounted filesystems. To take the machine down
> > cleanly I have to take it into single user mode and do all the umounts by hand
> > - interrupting a hung umount and starting it again seems to do the trick. Often
> > I end up with the fs unmounted but still listed in /etc/mtab. Strange.
> >
> > I know someone else is seeing problems with the automounter not unmounting
> > properly - anybody else see the same phenomenon?
> I've seen NFS problems for some time, going clear back to the 1.2.x series.
> If I mount my CD-ROM on machine A (where it lives) and then NFS mount it on
> machine B, everything works fine. Reversing the process is somewhat more
> difficult. Unmounting the NSF mount on machine B goes OK, however
> apparently machine A doesn't get the message, since attempting to unmount
> the CD-ROM on machine A generally (but not always) results in a "filesystem
> busy" (or it may be "device or resource busy") message. Sending a HUP to
> mountd always loosens up the stuck state, but sometimes kills mountd as
> well. I've kind of accepted it as The Way Things Are, since I don't use the
> CD-ROM that often, but it's annoying since the CD-ROM gate won't open while
> the filesystem is mounted. My CD-ROM is in an sbpcd module.
> --
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