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Byte-for-byte less energy usage?
An SSD can have a higher power draw over a shorter period of time, but not necessarily use the same amount of energy. Remember that power is energy over time.
You are moving goal-posts. Maybe you are right, but it is still false to claim something is always using more power because it has moving parts.
And of course I didn't only test it for 5 minutes, but rather the impact over a longer time period with the same typical workload of a home server/NAS (i.e. a lot of idling).
I'm not moving goalposts, I'm trying to explain more clearly the exact thing I said before. Feel free to read my original comment more carefully.
I did and you are still wrong. Maybe you should read more carefully what you wrote ;) You didn't specify in what way they are more "power-efficient". And the second sentence is pure conjecture with no real basis on facts.
Edit: Ok maybe you will understand it this way: if your workload is never exceeding the data-transfer speed that the HDD can deliver then the additional speed of SSDs is useless (a very common situation with NAS). So then you need to consider which technology is using less power over time under these conditions, and moving parts or not is not the relevant metric there.