例如，如果你碰巧在研究像固态硬盘这样的特定计算机硬件，你可能会认为较小的比较大的要快。但事实上是这样还是相反？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。

图为洪昌布（Flickr）摄。

问题

超级用户读者PGmath想知道为什么较小的SSD速度较慢：

I was reading this article on testing SSDs from Tom’s Hardware and came across the following claim:

• With SSDs, performance varies by capacity point. Smaller drives tend to be slower than larger ones, even in the same family.

However, the article does not back up the claim or explain why. It does not seem intuitive to me that **aller SSD drives would be slower. I would expect it to be the other way around since a larger drive has a wider “area” to access via the same bandwidth. In researching SSDs, I have found that many sites do not even include SSD drives **aller than 240 GB in their comparis***.

So, is it true that **aller (capacity) SSDs are slower? If so, why is that the case?

为什么较小的SSD速度较慢？

答案

超级用户贡献者magicandre1981和Hakan Lindqvist为我们提供了答案。首先，magicandre1981：

Larger SSDs are faster because they use more Channels in parallel while **aller ones only use a few channels (4 instead of 8):

接着是哈坎·林德克维斯特的回答：

The higher capacity variants of an SSD model often get their higher capacity from simply having more NAND flash chips of the same type as the lower capacity variants. Having more NAND flash chips allows for a design where the controller on the SSD can access more data in parallel, allowing for higher speeds.

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