Figure 1 shows a data block (for example, a 512 byte sector) with the 8-byte footer attached to the end.
图1显示一个数据块(例如一个512字节的扇区)，末尾有8字节的附加部分。
2
Big-endian means that the most significant byte has the lowest address (the word is stored big-end-first).
big - endian意味着最高位字节存储在最低地址(按高位优先的顺序存储字)。
3
However, this new code now assumes that the starting address is 16-byte aligned, and also that it has enough padding on the end that the next data element in memory is also 16-byte aligned.