I recently added a new Windows 10 VM to my UnRAID server using Q35-5.1 and virtio-win-0.1.190.1 and and I noticed when copying from the VM to the cache drive it was significantly slower than an older VM running Q35-4.2 and virtio-win-0.1.173-2. To verify, I cloned the old VM template and did a fresh Windows install and confirmed that it was much faster than using Q35-5.1 and virtio-win-0.1.190.1. I also tried i440fx-5.1 , but it was slower than Q35-5.1. Is this a known issue?   With Q3