TorsoBoy

I have a system setup for running some Windows 10 VMs. They are working flawlessly except for when we go to use a USB port to transfer a large data set (100+GB) it will transfer anywhere between 60-120 GB before the USB port will disconnect and reconnect again killing the transfer. All USB ports passed through to the VM, regardless of whether they are attached to the same BUS, then become unstable until the VM is rebooted. The system itself: Threadripper 3960x ASUS ROG STRIX TRX40-XE GAMING (bios v.1402) 2x ASUS TUF GAMING OC RTX3070 256GB 3600mhz RAM (8x32GB) 1x Intel 665p 1TB m.2 NVME for vdisks 2x ADATA SX8200 pro 2TB m.2 NVME Currently I run this as 2 Windows 10 VMs with the system split down the middle. Each VM Each getting their own 3070, 12 CPU cores, 120GB RAM and SX8200 as storage. Separate USB controllers are passed through to each VM. Everything works fine until I go to transfer a large file from a USB drive to the storage drive attached to the VM the USB dropouts start happening. I have tried all different combinations of USB 3 ports. They all seem to have this issue. I have tried only running a single VM with a single USB controller passed through. I have tried a separate PCI USB card passed through. The same thing happens with every combination suggesting there must be something wrong with my overall setup or the underlying system. I have attached one of the VMs XML template and the IOMMU groups. I have only been able to find one person mention this same issue when copying large files but there seemed to be no follow up to that. I realise most people probably aren't using USB to transfer large data sets regularly but unfortunately for us this is the optimal workflow. The only solution we currently have is to transfer the data set using another computer over the network which takes 4-5x longer than if we could do it directly on the machine itself. IOMMU Groups.txt VM.xml