Adding the pluginFor the additional check, a plugin is required. The plugin comes with the check_mk installation. Since I installed the OMD (Open Monitoring Distribution), the plugins can be found here:
Just copy the plugin called "smart" to the server you're monitoring into the agent plugins folder. I installed the agent using apt, my plugins folder is here
Since check_mk uses smartmontools, you'll need this package:
apt-get install smartmontools
Check the outputRun
/usr/bin/check_mk_agent | grep smart
and it should give you a line <<<smart>>> as output.
ReinventorizeReinventorize your host and you'll see the new SMART values.