Thank you very much, it's solved my problem. Cheers, Hugo MrPaul escreveu: > Are you wanting to merge your old rrd file with the new rrd file? If > so take a look at 'merge-rrd' > inhttp://oss.oetiker.ch/rrdtool/pub/contrib. > > In the future you can just rename your rrd files to the new names and > not loose any of the historical data. > > Paul