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

How do I monitor maximum latency using WMI Disk Health Sensor?



Hello, I'm trying to set up a sensor to alert when latency crosses a threshold on virtual disks connected to vSphere. I found a sensor to measure average latency, what I'm looking to alert on is latency spikes. This WMI Disk Health Sensor looks like it should do what I want it to do:


However, when I created one of those sensors on the disk that I'm interested in, it only shows Health Status and Operational Status channels, not the Read and Write latency channels shown on that help page. How do I get it to display the latency channels shown in the screenshots?


disk vsphere wmi

Created on Sep 8, 2020 6:09:39 PM

Last change on Sep 9, 2020 6:30:50 AM by  Moritz Heller [Paessler Support]

1 Reply



Hi there,

It's possible that your device does not provide the required metrics via WMI. This can be the reason according to the manual: "Which channels the sensor actually shows might depend on the monitored device and the sensor setup."

You can enable the option "Write Results to Disk" to receive additional log files which displays which values are received from the Sensor.

Created on Sep 9, 2020 6:35:41 AM by  Moritz Heller [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.