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為什麼較小的SSD較慢?

為什麼較小的SSD較慢?

Geoffrey Carr

例如,如果您正在研究像SSD這樣的特定計算機硬件,您可能會認為較小的計算機硬件比較大的計算機硬件更快。但實際情況是這樣,還是相反呢?今天的超級用戶問答帖子有一個好奇的讀者問題的答案。

今天的問答環節由SuperUser提供,這是Stack Exchange的一個細分,Stack Exchange是一個社區驅動的問答網站分組。

照片由Hong Chang Bum(Flickr)提供。

問題

超級用戶閱讀器PGmath想知道為什麼較小的SSD速度較慢:

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 smaller 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 smaller than 240 GB in their comparisons.

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

為什麼較小的SSD速度較慢?

答案

超級用戶貢獻者magicandre1981和Hakan Lindqvist為我們提供了答案。首先,magicandre1981:

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

隨後是Hakan Lindqvist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.


有什麼要補充說明嗎?在評論中發聲。想要從其他精通技術的Stack Exchange用戶那裡閱讀更多答案嗎?在這裡查看完整的討論主題。

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