of this option is that corruption of the contents
of a file can go unnoticed.
chk_data_crc (*) do not skip checking CRCs on data nodes
+compr=none override defoult comressor and set it to "none"
+compr=lzo override defoult comressor and set it to "lzo"
+compr=zlib override defoult comressor and set it to "zlib"
Quick usage instructions