'Return pool name where volume resides.
:param volume: The volume hosted by the driver.
:returns: Name of the pool where given volume is hosted.'

def get_pool(self, volume):

    eseries_volume = self._get_volume(volume['name_id'])
    storage_pool = self._client.get_storage_pool(eseries_volume['volumeGroupRef'])
    if storage_pool:
        return storage_pool.get('label')
