What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Setting up WMI free disk Sensor for Client that is offline from time to time (meeting room client)




I want to monitor the disk space for multiple clients which we use in our meeting rooms.

The sensor is setup, but I do have problems to configure the quiry schedule proberly.

What I would like to have is, a sensor that doenst give warnings when the client/sensor is not available, but only when it is available AND the disk space warning limit is reached.

Is that even possible?

We are using: PRTG Network Monitor x64

Thanks for your help!

Best, Sascha

prtg schedule wmi-free-disk-sensor

Created on Jan 19, 2018 1:59:36 PM

1 Reply



Dear Sascha,

this setup is not possible. The closest option would be to work with disk space error limit, and setup a Factory sensor with a custom status formula setting the factory sensor only to down if the first source sensor is up and the other one down. The manual page has a chapter "Define sensor status—status() function", describing the formula syntax.

Created on Jan 22, 2018 1:26:41 PM by  Arne Seifert [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.