Use DERIVE and set min value to 0 Regards, Sasha -- Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe Help mailto:rrd-users-request at list.ee.ethz.ch?subject=help Archive http://www.ee.ethz.ch/~slist/rrd-users WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi