code: Path[] getLocalDirs() throws IOException{
      String[] localDirs = getLocalDirsFromConf(fConf);
      Path[] paths = new Path[localDirs.length];
      FileSystem localFs = FileSystem.getLocal(fConf);
      for (int i = 0; i < localDirs.length; i++) {
        paths[i] = new Path(localDirs[i]);
        paths[i] = paths[i].makeQualified(localFs);
      }
      return paths;
    }
docs: get the paths in all the local disks.