@After
  public void tearDown() throws Exception {
    try {
      if (cache != null) {
        cache.close();
      }
    } finally {
      DiskStoreImpl.SET_IGNORE_PREALLOCATE = false;
    }
  }
Extracted and exploded {@code testDiskRegDWAttrbts} from {@link DiskRegionJUnitTest}.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionAttributesIntegrationTest.java