code: func Read(disk io.Reader) (*MBR, error) {
  	var this *MBR = &MBR{}
  	this.bytes = make([]byte, mbrSize)
  	_, err := disk.Read(this.bytes)
  	if err != nil {
  		return this, err
  	}
  
  	return this, this.Check()
  }
docs: /*
  Read MBR from disk.
  Example:
  f, _ := os.Open("/dev/sda")
  Mbr, err := mbr.Read(f)
  if err != nil ...
  f.Close()
  */