code: public static RaidNode createRaidNode(String argv[], Configuration conf)
        throws IOException, ClassNotFoundException {
      if (conf == null) {
        conf = new Configuration();
      }
      StartupOption startOpt = parseArguments(argv);
      if (startOpt == null) {
        printUsage();
        return null;
      }
      setStartupOption(conf, startOpt);
      RaidNode node = createRaidNode(conf);
      return node;
    }
docs: Create an instance of the RaidNode