code: public void setVolumeLabel(String label)
              throws ReadOnlyException, IOException {
          
          checkClosed();
          checkReadOnly();
  
          rootDirStore.setLabel(label);
          
          if (fatType != FatType.FAT32) {
              ((Fat16BootSector)bs).setVolumeLabel(label);
          }
      }
docs: Sets the volume label for this file system.
  
  @param label the new volume label, may be {@code null}
  @throws ReadOnlyException if the file system is read-only
  @throws IOException on write error