code: public void write(DataOutput out) throws IOException {
      super.write(out);
  
      //TODO: move it to DatanodeID once HADOOP-2797 has been committed
      out.writeShort(ipcPort);
  
      out.writeInt(storageInfo.getLayoutVersion());
      out.writeInt(storageInfo.getNamespaceID());
      out.writeLong(storageInfo.getCTime());
    }
docs: {@inheritDoc}