df -h output

[Svein Halvor Halvorsen]

* Daniel Gerzo [2005-06-07 23:09 +0200]
>  Actually, this question is asked 2-3 times a month (if not more) ;-)

In fact, it is asked so often, that one might be inclined to make the 
output of df imply this is some way or another, by means for a "reserved" 
column or something like that. But it would probably violate the pola 
and/or some standard.

Maybe the df manpage should mention this, incl. a reference to tunefs?