If you fill a directory (mount point) with data and then mount an NFS or SAMBA file system on it the space you use does not show up in a du listing but does show up as "used" in df. As an example, if you make a mount point /data (not a unique partition but part of /) and drop 10 GB into it, then mount fred:/whatever on /data, if fred:/whatever only has 1 GB in it that's all you'll see with a du -sh /data command but the 10GB is still used and takes 10 GB from your / filesystem. To make sure you haven't done this, unmount all NFS and SAMBA filesystems then check your filesystem sizes. Jan On Mon, 2004-11-22 at 23:39, Robert Epprecht wrote: > Andrew Burgess <aab@xxxxxxxxxxx> writes: > > > One thing that fooled my once was mounting over a non-empty > > directory. > > What happens if you do so? > > Robert