WindowsGuestDrivers/viostor/installation
From KVM
How to setup Windows guest VirtIO block driver on Windows Server 2003
Introduction
VirtIO block driver can be used either as a system (boot) or non-system disk. However, the installation procedure for these two different scenarios is slightly different.
System disk installation procedure
QEMU command line options
First of all, a VM needs to be started with the VirtIO block device and boot options enabled: -drive file=/image_path/image_name,if=virtio,boot=on In addition, a virtual floppy disk with correct Windows drivers must be specified: -fda /floppy_image_path/floppy_image_name