https://blog.faceutil.com/2017/05/06/usb-%ed%8f%ac%eb%a7%b7-%eb%b0%8f-%ed%8c%8c%ed%8b%b0%ec%85%98-%eb%b6%84%ed%95%a0-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%a8-bootice_20120920_k-l/