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and if the server isn't really doing much, the disk will be idle 90+ % of the time. As a result, setting a warning to 80% and criticle to 90% really isn't going to work.
basicly, I need to know when idle time gets below 20%
The problem with that, is that if the drive isn't doing much, it's idle time will be close to 100%
What I need to know is when Disk idle time is below 20%.
I have not seen or used < or > with warning and threshold limits, normally it is done with : and ~, such as https://nagios-plugins.org/doc/guidelin ... HOLDFORMAT I'd suggest changing the < to : and trying it out. That should give you a less than 20% usage sends an critical notification, type of scenario.
Nagios-Plugins maintainer exclusively, unless you have other C language bugs with open-source nagios projects, then I am happy to help! Please pm or use other communication to alert me to issues as I no longer track the forum.