'Retrieve stats info for Windows device.'

def _update_volume_stats(self):

    LOG.debug('Updating    volume    stats')
    (total_gb, free_gb) = self._get_capacity_info()
    data = {}
    backend_name = self.configuration.safe_get('volume_backend_name')
    data['volume_backend_name'] = (backend_name or self.__class__.__name__)
    data['vendor_name'] = 'Microsoft'
    data['driver_version'] = self.VERSION
    data['storage_protocol'] = 'iSCSI'
    data['total_capacity_gb'] = total_gb
    data['free_capacity_gb'] = free_gb
    data['reserved_percentage'] = self.configuration.reserved_percentage
    data['QoS_support'] = False
    self._stats = data
