> what I meant is that if the true fan readings are usually 4111,4221, > and 4309, for example, you'd expect to see a "stairstep" type of plot > where only those values are shown and all the lines are vertical or > horizontal; if there were interpolation, however, intermediate values > would be plotted, which would make it appear that the fan sensor had > more resolution than it actually did. Oh OK, now I see what you mean. However, I don't see much added value in knowing the resolution of the fan. RRD is meant to average the value, it's a bit silly to use it and then complain about that ;) -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/