Weird mount problem

[Bob Nielsen]

On Sun, Feb 20, 2005 at 11:22:24PM -0500, Ron Peterson wrote:
> On Sun, Feb 20, 2005 at 12:17:59PM -0800, Bob Nielsen wrote:
> > On Sun, Feb 20, 2005 at 01:18:43PM -0500, Ron Peterson wrote:
> > > On Sun, Feb 20, 2005 at 08:24:04AM -0800, Bob Nielsen wrote:
> > > > On Sun, Feb 20, 2005 at 07:51:38AM +0000, Sean Miller wrote:
> > > > > rpowersau at gmail.com wrote:
> > > > > 
> > > > > >Why hdb2? Have you tried hdb0, hdb1, ...?
> > > > > > 
> > > > > >
> > > > > One thing you haven't told us is the mount command you are trying to use...
> > > > 
> > > > mount -t ext3 /dev/hdb2 /mnt
> > > > 
> > > > > 
> > > > > If it's mount /dev/hda2 /mnt it is not going to work, because /mnt is 
> > > > > not a mountpoint; it is a directory too high.
> > > > 
> > > > Actually it is a mount point, since there were no directories or files 
> > > > below that point.
> > > 
> > > Anyplace is a mount point, the mount will just hide anything beneath it.
> > > 
> > > > There is a Win 98SE (fat32) partition at /dev/hdb1 and I get the same 
> > > > error when trying to mount it:
> > > > 
> > > > $ sudo mount -t vfat /dev/hdb1 /mnt
> > > > mount: /dev/hdb1 already mounted or /mnt busy
> > > 
> > > Make sure you're not cd'd into the directory somewhere..
> > > 
> > > Have you tried using fuser or lsof to see what processes may be using
> > > the directory?  e.g.
> > > 
> > > fuser /mnt
> > > lsof +D /mnt
> > 
> > Neither of these commands report any results.   I am not a newbie (using 
> > Linux for >10 years), but I have never seen anything like this before.
> 
> Weird.  Just on a lark ... are you doing any NFS?  If you run 'df' does
> it return?  I've seen hung NFS mounts make things go wonky before..
> 

No NFS and df works.  I did some more tests and found that it only
happens when I use the patched 2.6.8 kernel for Win4Lin, not with a
warty kernel.  Even more confusing....