I have a Fedora Core 4 server that is hosting a number of web sites.
It seems every week or so that a large number of GB go missing.  What
I mean is that while df shows 26GB used, du of that same mount show
only 7.4 GB used.  It seems that MySQL may be chomping some space in a
weird way because when I restart the MySQL server the space reappears.

The partition in question is xfs with usrquota enabled.  Has anyone
seen this behavior before?

-- 
Donovan Niesen