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Yes - the announcement for the older i3 instances (https://aws.amazon.com/blogs/aws/now-available-i3-instances-...) claims 3.3M IOPS (presumably on the largest size, with 15.2TB) So it looks to me like these are larger, slower drives?

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It used to be 3.3M IOPS on 8 SSDs and now it's 2M on 8 SSDs but significantly cheaper; I wouldn't be surprised if they've replaced MLC with TLC.

8 TLC drives could easily hit 3.3M IOPS before... i3 have 8 1.9TB NVMe SSDs max, right? A 2TB P4600(TLC NAND) has 610,000 random read IOPS max, so that's 4.8M IOPS right there. A 7.68TB P4320 has 427,000 random read IOPS max, so that's 3.42M IOPS right there over 8 drives... Maybe they went from TLC to QLC with these ones?

This seems to be confirmed by the IOPS numbers in the documentation:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/storage-...

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