[rrd-users] Possible bug ?

[Sven Goldt]

Hello,

i am using mrtg to monitor the temperature of my HD.
The monitor script outputs this:
43
43
undef
undef

The logging is in rrdtool format. Unfortunately in the .rrd file appears
only nonsense or nothing. So i tried to debug the situation like this:

rrdtool create temperature.rrd --step 300 DS:temp1:GAUGE:600:-273:5000 \
DS:temp2:GAUGE:600:-273:5000 \
RRA:AVERAGE:0.5:1:1200 \
RRA:MIN:0.5:12:2400 \
RRA:MAX:0.5:12:2400 \
RRA:AVERAGE:0.5:12:2400

rrdtool update temperature.rrd N:43:43
rrdtool fetch temperature.rrd MIN -s -1h
rrdtool update temperature.rrd N:43:43
rrdtool fetch temperature.rrd MIN -s -1h

The fetch output is:
                          temp1               temp2

						  1088600400: nan nan
						  1088604000: nan nan
						  1088607600: nan nan


What's wrong ? Where are my values ?

Greets, Sven

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