[rrd-users] rrd not storing data.

[Mike Lindsey]

I've got a bunch of rrd files that I'm creating and storing data in. 
Everything looks fine until I pull the data back out...  All I get is
NaNs...

Create command:
rrdtool create file.rrd DS:value:COUNTER:600:U:U RRA:AVERAGE:0.5:1:1200

update command (on a 5 minute crontab):
rrdtool update file.rrd -t value N:787882194044

dump:
rrdtool dump file.rrd
<!-- Round Robin Database Dump -->
<rrd>
        <version> 0001 </version>
        <step> 300 </step> <!-- Seconds -->
        <lastupdate> 1090355797 </lastupdate> <!-- 2004-07-20 13:36:37 PDT -->

        <ds>
                <name> value </name>
                <type> COUNTER </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>

                <!-- PDP Status -->
                <last_ds> 787882194044 </last_ds>
                <value> 0.0000000000e+00 </value>
                <unknown_sec> 97 </unknown_sec>
        </ds>

<!-- Round Robin Archives -->
        <rra>
                <cf> AVERAGE </cf>
                <pdp_per_row> 1 </pdp_per_row> <!-- 300 seconds -->
                <xff> 5.0000000000e-01 </xff>

                <cdp_prep>
                        <ds><value> NaN </value>  <unknown_datapoints> 0 </unkno
wn_datapoints></ds>
                </cdp_prep>
                <database>
[snip]
                        <!-- 2004-07-20 12:45:00 PDT / 1090352700 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 12:50:00 PDT / 1090353000 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 12:55:00 PDT / 1090353300 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:00:00 PDT / 1090353600 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:05:00 PDT / 1090353900 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:10:00 PDT / 1090354200 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:15:00 PDT / 1090354500 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:20:00 PDT / 1090354800 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:25:00 PDT / 1090355100 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:30:00 PDT / 1090355400 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:35:00 PDT / 1090355700 -->
<row><v> NaN </v></row>
                        <!-- 2004-07-20 13:40:00 PDT / 1090356000 -->
<row><v> NaN </v></row>
                </database>
        </rra>
</rrd>

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