In the maintenance of the virtualization environment, we sometimes face different issues and challenges. One such problem is to change the virtual hardware configuration for virtual machines. For example, we need to add or remove a certain amount of memory, change the number of processors, or attach an additional virtual disk or a network interface. In oVirt there are also hot pluggable virtual disks and network interfaces that can be added without stopping the virtual machine. Hot plugging is only available for VirtIO devices. Other types of devices can be connected only when the machine is turned off.
In order to hot plug a virtual disk, perform the following steps: