'Return a tuple of P-VOL and S-VOL\'s info of a Shadow Image pair.'

def _get_full_copy_info(self, ldev):

    (vol_type, pair_info) = self._get_vol_type_and_pair_info(ldev)
    svol_info = []
    if (vol_type == SMPL):
        return (None, None)
    elif (vol_type == SVOL):
        return (pair_info['pvol'], [pair_info['svol_info']])
    for mun in range(_MAX_MUNS):
        pair_info = self._get_full_copy_pair_info(ldev, mun)
        if pair_info:
            svol_info.append(pair_info['svol_info'])
    return (ldev, svol_info)
