'Create device groups and a copy group for the SI volume pair.'

def _add_pair_config(self, pvol, svol, copy_group, ldev_name, mun):

    pvol_group = (copy_group + 'P')
    svol_group = (copy_group + 'S')
    self.run_raidcom('add', 'device_grp', '-device_grp_name', pvol_group, ldev_name, '-ldev_id', pvol)
    self.run_raidcom('add', 'device_grp', '-device_grp_name', svol_group, ldev_name, '-ldev_id', svol)
    nr_copy_groups = self._check_copy_grp(copy_group)
    if (nr_copy_groups == 1):
        self.run_raidcom('delete', 'copy_grp', '-copy_grp_name', copy_group)
    if (nr_copy_groups != 2):
        self.run_and_verify_storage_cli('raidcom', 'add', 'copy_grp', '-copy_grp_name', copy_group, pvol_group, svol_group, '-mirror_id', mun, '-s', self.conf.vsp_storage_id, ('-IM%s' % self.conf.vsp_horcm_numbers[_HORCMGR]), success_code=HORCM_EXIT_CODE)
