There are already some old scripts floating around to do this automatically. I've used both of the ones below with similar results.<br><br>Perl script: <a href="http://www.pintori.it/rrd-merger">http://www.pintori.it/rrd-merger
</a><br>Python script: <a href="http://oss.oetiker.ch/rrdtool/pub/contrib/merge-rrd.py">http://oss.oetiker.ch/rrdtool/pub/contrib/merge-rrd.py</a><span style="font-weight: bold;"><span style="font-weight: bold;"><span style="font-weight: bold;">
<span style="font-weight: bold;"><br><br></span></span></span></span>These scripts both dump to xml, replace 0s with in the new rrd file with values from the old rrd file then create a new rrd with the modified data.<br><br>
Paul<br>