This morning I installed Disk Monitor Plugin on my Raspberry Pi 4 8GB
The only operation I have made since installed is to copy about 1TB from the computer to the OMV drive.
While copying, at the beginning I could see all the data. But suddenly, Disk I/O and Disk Usage sections are empty. I can only see CPU Usage, Load Average, Memory Usage, Network Interfaces and Uptime.
I have uninstalled Disk Monitor Plugin and installed again, but these two sections are still empty