100% Disk Usage for Windows 10 VMs

[contoured_solutions]

Greetings!

I have a ProxMox environment I setup earlier this month. The server has both local and network (10Gb) storage. I created two Windows 10 VMs. In both cases, I am using the Virtio SCSI driver and Virtio disks. In both cases, I seem to be getting poor disk performance. When I look at the Performance Monitor in their Windows environment, disk active time is 100% unless I let it idle for a long time. I did some research and tried

 

[Dunuin]

What disks are you using? SMR HDDs or QLC SSD? Is the hosts IO delay also high?

 

[contoured_solutions]

See attached image. IO Delay does not seem to be an issue.

In this case, the disk usage seemed to be normal. After I closed Teams on my Windows 10 instance (a coincidence, I am guessing), the disk activity shot up to 100%, but the IO delay was normal. Any ideas?

The local disks are 1TB 10K SAS disks and the NAS storage is is a RAID z2 (TrueNAS) using 6TB SATA disks with an Nvme cache disk.