r, w := io.Pipe()
	h := algo.New()

	bw := &streamingBitrotWriter{
		iow:          ioutil.NewDeadlineWriter(w, globalDriveConfig.GetMaxTimeout()),
		closeWithErr: w.CloseWithError,
		h:            h,
		shardSize:    shardSize,
		canClose:     &sync.WaitGroup{},
	}
	bw.canClose.Add(1)
	go func() {
		defer bw.canClose.Done()