File: check_zero_values.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/loose.dtd">
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>Not NaN, but 0 (zero) values?</TITLE
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>Not NaN, but 0 (zero) values?</A
></H1
><P
>Pay attention to custom scripts. It is required,
			that external commands called from there are in the <TT
CLASS="FILENAME"
>$PATH</TT
>
			of the cactiuser running the poller. It is therefor recommended to provide
			<TT
CLASS="FILENAME"
>/full/path/to/external/command</TT
></P
><P
>User "criggie" reported an issue with running smartctl.
			It was complaining "you are not root" so a quick
			<KBD
CLASS="USERINPUT"
>chmod +s</KBD
> on the script fixed that
			problem.</P
><P
>Secondly, the script was taking several seconds to run.
			So cacti was logging a "U" for unparseable in the debug
			output, and was recording NAN. So my fix there was to make
			the script run faster - it has to complete in less than one
			second, and the age of my box made it difficult to accomplish.</P
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