byteBuf := new(bytes.Buffer)
	w := NewWriter(byteBuf)
	// Write the runes out using WriteRune
	buf := make([]byte, utf8.UTFMax)
	for r := rune(0); r < NRune; r++ {
		size := utf8.EncodeRune(buf, r)
		nbytes, err := w.WriteRune(r)
		if err != nil {
			t.Fatalf("WriteRune(0x%x) error: %s", r, err)
		}
		if nbytes != size {
			t.Fatalf("WriteRune(0x%x) expected %d, got %d", r, size, nbytes)
		}
	}
	w.Flush()

			return nil, errDiskNotFound
		}
	}

	return w, nil
}

func (s *xlStorage) openFileSync(filePath string, mode int, skipParent string) (f *os.File, err error) {
	return s.openFile(filePath, mode|writeMode, skipParent)
}

func (s *xlStorage) openFile(filePath string, mode int, skipParent string) (f *os.File, err error) {
	if skipParent == "" {
		skipParent = s.drivePath
	}