有时，当你看到一些被多个名字引用的东西时，比如exFAT和FAT64，会有点困惑或沮丧。哪个名字是正确的，还是两者都正确？今天的超级用户问答帖子回答了一位好奇的读者的问题。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

照片由安德鲁·史密斯（Flickr）提供。

问题

超级用户读者rany想知道exFAT是否只是FAT64的另一个名称：

I conducted a quick Google search and realized that some people are referring to exFAT as FAT64. Is exFAT just another name for FAT64?

exFAT只是FAT64的另一个名字吗？

答案

超级用户贡献者ChrisInEdmonton为我们提供了答案：

There is no such thing as FAT64 (at least not at this time), but there is exFAT, which some people refer to as FAT64.

Why do they do this? The history of the File Allocation Table is quite involved. These days, the most common implementati*** are FAT32 (though this is increasingly uncommon) and exFAT. FAT32 was a significant improvement over the older FAT file systems, allowing volume sizes up to 2TB (with a sector size of 512 bytes) and 16TB (with a sector size of 64KB). That is still large enough for most installati*** in 2016. Unfortunately, the largest file size was one byte less than 4GB, which is pretty **all nowadays.

exFAT does away with the 4GB limit, allowing files well into the PB range, and similarly with the volume size. It does so using 64-bit length fields. As FAT32 used 32-bit length fields, exFAT naturally acquired the nickname FAT64.

So yes, FAT64 and exFAT are the same thing, but exFAT is the correct name.

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