Extract Method	package makeDataNodeDirs(dnIndex int, storageType StorageType) : String extracted from public startDataNodes(conf Configuration, numDataNodes int, manageDfsDirs boolean, operation StartupOption, racks String[], hosts String[], simulatedCapacities long[], setupHostsFile boolean, checkDataNodeAddrConfig boolean, checkDataNodeHostConfig boolean) : void in class org.apache.hadoop.hdfs.MiniDFSCluster