Can't umount a formerly mounted drive

[Gary Jennejohn]

On Fri, 3 Feb 2012 13:50:53 -0500
Derek Tattersall <dlt at mebtel.net> wrote:

> * Ryan Stone <rysto32 at gmail.com> [120203 13:41]:
> > On Fri, Feb 3, 2012 at 9:34 AM, Derek Tattersall <dlt at mebtel.net> wrote:
> > > I have two drives in a x86-64 machine.  Drive ada2 has current on it, and
> > > drive ada1 has 9-stable on it.  At some point, while running current, I
> > > mounted the /home partition from stable to copy some files and re-ipled
> > > the system into stable.  every thing worked properly.  Some time later I
> > > ipled current again.  I then noticed that the stable /home was mounted
> > > on /mnt.  I tried to umount it but the operation failed as /dev/ada1p7
> > > was not considered mounted.  Yet with out mounting I could access all
> > > the files on stable's /home, I could create and delete files.
> > >
> > > The current system was cvsup'ed on Wednesday this week, while the stable
> > > system was cvsup'ed last Sunday.  Neither system has exhibited any
> > > hiccups.  Can somebody explain what has happened her on the current
> > > system and how it should be corrected?
> > 
> > Does "mount" list anything as being mounted on /mnt?  If not, are you
> > sure that /mnt isn't a symlink to somewhere else?  Or maybe the
> > contents of the home directory were copied to /mnt by accident?
> mount command on the current system does not list anything under /mnt.
> ls /mnt on the current system list the top level directories on ada1p7,
> the stable /home.  It lists them as soon as a user logs in on a newly
> booted current system.  It's really frustrating.
>

Well, it certainly looks like Ryan's suggestion that files from /home were
copied to /mnt (with nothing mounted on it) is correct.

Try mounting /home to a different location, like /mnt1, and compare the
dates on the suspicious files.  Wouldn't surprise me to find that they
differ.

-- 
Gary Jennejohn