}

	data := make([]byte, 4, r.Msgsize()+4)

	// Initialize the header.
	binary.LittleEndian.PutUint16(data[0:2], rebalMetaFmt)
	binary.LittleEndian.PutUint16(data[2:4], rebalMetaVer)

	buf, err := r.MarshalMsg(data)
	if err != nil {
		return err
	}

	return saveConfigWithOpts(ctx, store, rebalMetaName, buf, opts)
}

func (r *rebalanceMeta) save(ctx context.Context, store objectIO) error {

		Number:     partID,
		ETag:       md5hex,
		Size:       n,
		ActualSize: actualSize,
		ModTime:    UTCNow(),
		Index:      index,
		Checksums:  r.ContentCRC(),
	}

	partFI, err := partInfo.MarshalMsg(nil)
	if err != nil {
		return pi, toObjectErr(err, minioMetaMultipartBucket, partPath)
	}

	// Serialize concurrent part uploads.