SSDs exhibit the same sort of cache locality RAM does. When a region is accessed... | Hacker News

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lucian1900 on May 6, 2012 | parent | context | favorite | on: 3x faster linux boot with e4rat

SSDs exhibit the same sort of cache locality RAM does. When a region is accessed, a larger chunk is fetched and cached just in case it's needed later.

nuje on May 7, 2012 [–]

Yes, and the OS readahead also helps.

You can see the random vs sequential difference in any ssd review, eg http://thessdreview.com/our-reviews/ocz-vertex-3-240gb-max-i... shows 18 MB/s in random reads vs 500 MB/s sequential reads.

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