maybe you can help me, I first followed this guide http://people.ee.ethz.ch/~oetiker/we...dbuild.en.html
from rrdtool and everything worked ok, as far as I understand, I had to install freetype2 and 2-3 other packages with apt-get but everything worked out.
Then I continued with this guide: http://www.eth0.us/hotsanic
and started setting up all modules.
I have to mention that I set up hotsanic severall times by now on different machines and I can get it running with an older version of rrdtool.
with the latest version, when I start ./diagrams.pl I get the error I mentioned above and I do not know what settings to input in the disk_io module as the examples are only about sda and hda and I have raid configured.