[CentOS-virt] Trouble with virtio storage

Answering my own question :-). I had to recreate the initrd with virtio
stuff included ie.

mkinitrd --with virtio_pci --with virtio_blk --with virtio_net --with
virtio_balloon --with virtio -f /boot/initrd-$(uname -r) $(uname -r)

Somehow I thought it was already included :-/.

Vladimir