def METHOD_NAME(self):
    """"
    Validate if pool and replicas have more than 8MiB (minimum pool size).
    """
    size = 0
    for part in self.parts:
        size += part.size
    if size < POOL_MIN_SIZE:
        futils.fail('The pool has to have at least 8 MiB')
    for replica in self.replicas:
        size = 0
        for part in replica:
            size += part.size
        if size < POOL_MIN_SIZE:
            futils.fail('The pool has to have at least 8 MiB')