Hello fellow Cacti, I have created some XML Templates for monitoring Device [Disk] IO using net-snmp. My Cacti setup is 08.7b with all the latestes patches, RRDTool 1.2.23, running on CentOS 5 i386 Linux. Although the templates work (pretty graphs are generated based on values recieved by SNMP queries) I am not 100% sure the math behind the math (CDEF) behind the graph calculates properly. In eith