1.add a scsi hdd.
2. install the scsi drivers . (virtio-win.xxxx.iso ,download from https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio).
3. stop vm .
4. edit vm config files (/etc/pve/qemu_server/vid.conf)
modify ide(or sata) to scsi ( ie : ide0 -- > scsi0 ...