return err
	}

	switch p.Version {
	case poolMetaVersionV1:
	default:
		return fmt.Errorf("unexpected pool meta version: %d", p.Version)
	}

	return nil
}

func (p *poolMeta) CountItem(idx int, size int64, failed bool) {
	pd := p.Pools[idx].Decommission
	if pd == nil {
		return
	}
	if failed {
		pd.ItemsDecommissionFailed++
		pd.BytesFailed += size
	} else {