Where does the data come from that populates this dialog?
The data in the screenshot is calculated from information provided via a "DataMinerPerformanceInfoEventMessage". This event gets it data from various sources (SLWatchdog, SLDataminer,SLNet) depending on the type of data .
The data in the screenshot originates in SLWatchdog, this is the same info as in the SLWatchdog reports, which gets generated once every hour by default (or when certain events, such as and RTE happen).
SLWatchdog generates this data using a set of WMI-queries.
Which tag exactly was empty? The HD-tag?
This is most likely due to a failure in executing the WMI-Query, resulting in no usable results. You can verify the WMI-query by running the following command in a powershell window
Get-CimInstance -Query “SELECT * from Win32_PerfRawData_PerfDisk_LogicalDisk where Name!=’_Total'”
Brent thank you for this information! In this care the report from SLWatchdog has an empty tag. This would be why its showing up as 0 in the screenshot from Michael. Would you have any idea why this tag would be empty like this while the rest of the agents are coming up normally?