hopts := hash.Options{
				Size:       int64(len(fanOutBuf)),
				MD5Hex:     opts.MD5Hex,
				SHA256Hex:  "",
				ActualSize: -1,
				DisableMD5: true,
			}
			hr, err := hash.NewReaderWithOpts(ctx, bytes.NewReader(fanOutBuf), hopts)
			if err != nil {
				errs[idx] = err
				return
			}

			reader := NewPutObjReader(hr)
			defer func() {
				if err := reader.Close(); err != nil {

		forceMD5 = mustGetUUIDBytes()
	}

	hashReader, err := hash.NewReaderWithOpts(ctx, reader, hash.Options{
		Size:       size,
		MD5Hex:     md5hex,
		SHA256Hex:  sha256hex,
		ActualSize: actualSize,
		DisableMD5: false,
		ForceMD5:   forceMD5,
	})
	if err != nil {

	if !etag.ContentMD5Requested(formValues) && (kind == crypto.SSEC || kind == crypto.S3KMS || !globalServerCtxt.StrictS3Compat) {
		forceMD5 = mustGetUUIDBytes()
	}

	hashReader, err := hash.NewReaderWithOpts(ctx, reader, hash.Options{
		Size:       actualSize,
		MD5Hex:     clientETag.String(),
		SHA256Hex:  "",
		ActualSize: actualSize,
		DisableMD5: false,
		ForceMD5:   forceMD5,
	})

	if !etag.ContentMD5Requested(r.Header) && (crypto.S3KMS.IsRequested(r.Header) || crypto.SSEC.IsRequested(r.Header) || !globalServerCtxt.StrictS3Compat) {
		forceMD5 = mustGetUUIDBytes()
	}
	hashReader, err := hash.NewReaderWithOpts(ctx, reader, hash.Options{
		Size:       size,
		MD5Hex:     md5hex,
		SHA256Hex:  sha256hex,
		ActualSize: actualSize,
		DisableMD5: false,
		ForceMD5:   forceMD5,
	})
	if err != nil {