mega_div64_32
row = mega_div64_32(stripRow, raid->rowDataSize);
blk = mega_div64_32((row-quad->logStart), quad->diff);
blk = mega_div64_32
span_set_Row = mega_div64_32(span_set_Strip,
strip = mega_div64_32
u_int64_t mega_div64_32(u_int64_t dividend, u_int32_t divisor);
start_row = mega_div64_32(start_strip, raid->rowDataSize); // Start Row
endRow = mega_div64_32(endStrip, raid->rowDataSize);
span_row = mega_div64_32(((quad->logEnd -