# File lib/vagrant-libvirt/config.rb, line 531
      def _handle_cdrom_storage(options = {})
        # <disk type="file" device="cdrom">
        #   <source file="/home/user/virtio-win-0.1-100.iso"/>
        #   <target dev="hdc"/>
        #   <readonly/>
        #   <address type='drive' controller='0' bus='1' target='0' unit='0'/>
        # </disk>
        #
        # note the target dev will need to be changed with each cdrom drive (hdc, hdd, etc),
        # as will the address unit number (unit=0, unit=1, etc)

        options = {
          bus: 'ide',
          path: nil
        }.merge(options)

        cdrom = {
          dev: options[:dev],
          bus: options[:bus],
          path: options[:path]
        }

        @cdroms << cdrom
      end