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After reading up on SSD technology, there's a question I can't seem to answer.

Judging by this Anandtech review, most current SSDs use at least a 8KB page size. As far as I understand, this means that no less than 8KB can be written to the SSD's NAND at once. Apparently, this helps for random writes as well as other things.

However, many current filesystems use a 4KB block size. Does this mean that, for a single 4K write, the SSD write amplification is at least 2, since a whole 8KB page is written? What about random 4K writes?

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Have you read en.wikipedia.org/wiki/Write_amplification ? –  Mxx Jul 24 '13 at 6:53

1 Answer 1

No the SSD will just take 2 4K writes and put them together to make the 8K write.

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