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     Path file1 = new Path("/simpleAppend.dat");
        FSDataOutputStream stm = AppendTestUtil.createFile(fs, file1, 1);
        System.out.println("Created file simpleAppend.dat");

        // write to file
        int mid = 186;   // io.bytes.per.checksum bytes
        System.out.println("Writing " + mid + " bytes to file " + file1);
        stm.write(fileContents, 0, mid);
        stm.close();
        System.out.println("Wrote and Closed first part of file.");

        // write to file
        int mid2 = 607;   // io.bytes.per.checksum bytes
        System.out.println("Writing " + mid + " bytes to file " + file1);
        stm = fs.append(file1);
        stm.write(fileContents, mid, mid2-mid);
        stm.close();
        System.out.println("Wrote and Closed second part of file.");

        // write the remainder of the file
        stm = fs.append(file1);

        // ensure getPos is set to reflect existing size of the file
        assertTrue(stm.getPos() > 0);

        System.out.println("Writing " + (AppendTestUtil.FILE_SIZE - mid2) +
            " bytes to file " + file1);
        stm.write(fileContents, mid2, AppendTestUtil.FILE_SIZE - mid2);
        System.out.println("Written second part of file");
        stm.close();
        System.out.println("Wrote and Closed second part of file.");

        // verify that entire file is good
        AppendTestUtil.checkFullFile(fs, file1, AppendTestUtil.FILE_SIZE,
            fileContents, "Read 2");
      }