[rrd-users] RRD Wrong (Unexpected) Values

[NeNegoro]

Hello!

I update my RRD every 1 second with my scrip and there is an example of what
I put into RRD:
Time: 1392101032 Template: DMC191:DMC257:DMC266:fake1 Value N:U:U:U:U
Time: 1392101033 Template: DMC191:DMC257:DMC266:fake1 Value N:U:671:U:U
Time: 1392101034 Template: DMC191:DMC257:DMC266:fake1 Value N:U:488:U:U
Time: 1392101035 Template: DMC191:DMC257:DMC266:fake1 Value N:U:U:U:U
Time: 1392101036 Template: DMC191:DMC257:DMC266:fake1 Value N:U:U:U:U
Time: 1392101037 Template: DMC191:DMC257:DMC266:fake1 Value N:U:524:U:U
Time: 1392101038 Template: DMC191:DMC257:DMC266:fake1 Value N:U:U:U:U

But in RRD (after rrdfetch) I get the following values:
1392101032: -nan -nan -nan -nan
1392101033: -nan 2.0121880900e+02 -nan -nan
1392101034: -nan 6.1765165700e+02 -nan -nan
1392101035: -nan 4.8800000000e+02 -nan -nan
1392101036: -nan -nan -nan -nan
1392101037: -nan 1.3942592000e+02 -nan -nan
1392101038: -nan 5.2400000000e+02 -nan -nan
1392101039: -nan -nan -nan -nan

I wonder why I get:
1392101033: -nan 2.0121880900e+02 -nan -nan
and
1392101037: -nan 1.3942592000e+02 -nan -nan
While I expect UNKNOWN(nan) value instead!
What should I do to eliminate improper value?

I have the following RRD settings:
"-s 1",
"DS:fake1:GAUGE:2:300:5000",
"DS: DMC191:GAUGE:2:300:5000",
"DS: DMC257:GAUGE:2:300:5000",
"DS: DMC266:GAUGE:2:300:5000",
"RRA:LAST:0:1:32400",
"RRA:AVERAGE:0:60:2880",
"RRA:AVERAGE:0:300:2016",
"RRA:AVERAGE:0:900:2880",
"RRA:MIN:0:60:2880",
"RRA:MIN:0:300:2016",
"RRA:MIN:0:900:2880",
"RRA:MAX:0:60:2880",
"RRA:MAX:0:300:2016",
"RRA:MAX:0:900:2880"



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