Pieces =  6
cksum.aa = 3704408296 1457152
cksum.ab = 3758918787 1457152
cksum.ac = 470574930 1457152
cksum.ad = 2529809724 1457152
cksum.ae = 1108784145 1457152
cksum.af = 2896124223 545257