var buffer []byte
	switch size := data.Size(); {
	case size == 0:
		buffer = make([]byte, 1) // Allocate at least a byte to reach EOF
	case size >= fi.Erasure.BlockSize || size == -1:
		if int64(globalBytePoolCap.Load().Width()) < fi.Erasure.BlockSize {
			buffer = make([]byte, fi.Erasure.BlockSize, 2*fi.Erasure.BlockSize)
		} else {
			buffer = globalBytePoolCap.Load().Get()
			defer globalBytePoolCap.Load().Put(buffer)
		}

			partEncryptionKey := objectEncryptionKey.DerivePartKey(uint32(partID))
			in := io.Reader(hashReader)
			if size > encryptBufferThreshold {
				// The encryption reads in blocks of 64KB.
				// We add a buffer on bigger files to reduce the number of syscalls upstream.
				in = bufio.NewReaderSize(hashReader, encryptBufferSize)
			}

			var nonce [12]byte
			tmp := sha256.Sum256(fmt.Append(nil, uploadID, partID))

		buffer = make([]byte, size, 2*size+int64(fi.Erasure.ParityBlocks+fi.Erasure.DataBlocks-1))
	}

	if len(buffer) > int(fi.Erasure.BlockSize) {
		buffer = buffer[:fi.Erasure.BlockSize]
	}

	writers := make([]io.Writer, len(onlineDisks))
	inlineBuffers := make([]*bytes.Buffer, len(onlineDisks))
	for i, disk := range onlineDisks {
		if disk == nil {

}

const (
	compressionAlgorithmV1 = "golang/snappy/LZ77"
	compressionAlgorithmV2 = "klauspost/compress/s2"

	// When an upload exceeds encryptBufferThreshold ...
	encryptBufferThreshold = 1 << 20
	// add an input buffer of this size.
	encryptBufferSize = 1 << 20

	// minCompressibleSize is the minimum size at which we enable compression.
	minCompressibleSize = 4096
)

	}
	Range := &HTTPRangeSpec{Start: startOffset, End: startOffset + length}

	reader, err := api.GetObjectNInfo(ctx, bucket, object, Range, header, opts)
	if err != nil {
		return err
	}
	defer reader.Close()

	_, err = xioutil.Copy(writer, reader)
	return err