Overview

ZStack Cloud provides the USB passthrough feature, which means that a USB device on a host can be directly passed through to a VM instance. A USB passthrough has the following two modes:

• Direct passthrough: Assume that a USB device is attached to a VM instance on a host. When you migrate this VM instance, you need to detach this USB device.
• Transmission passthrough: Assume that a USB device is attached to a VM instance in a cluster where the host of the VM instance is running. When you migrate this VM instance, you do not need to detach this USB device.