this post was submitted on 11 Apr 2024
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33
Recommendation for low power SSD (derpzilla.net)
submitted 8 months ago by Kwa@derpzilla.net to c/selfhosted@lemmy.world
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I’m trying to improve the power consumption of my NAS. The 2 (7200 rpm) HDDs I had were using 15W at idle and 5W when spun down. I’m reading a lot of conflicting information about what is lower power between HDD, SSD and NVMe SSD. Eventually I started looking at SATA SSD (please let me know if this is not the most power efficient)

I found this site that shows a benchmark of different SSDs and their average power consumption. I was about to go with WD Red but then I found a YouTube video saying I shouldn’t go with WD for a NAS.

Can you tell me what brand or model you’re using in your homelab that’s power efficient? Ideally I would like 4TB SSD.

Thanks!

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[–] Septimaeus@infosec.pub 4 points 8 months ago (1 children)

Not sure what everyone is arguing about here. Clearly SSD is better for intermittent r/w, whereas HDD can be more efficient at continuous r/w (especially in terms of watts/TB)

Just looking at specs should be enough to see that. SSDs can idle in ready state at close to 0 draw (~0.05w) whereas HDD requires continued rotation to remain ready. So consider an extreme case of writing for 1 minute then maintaining ready state for the rest of the day. For that the SSD will be far more efficient, obviously.

[–] SpaceNoodle@lemmy.world 2 points 8 months ago* (last edited 8 months ago) (1 children)

Classic mob mentality. OC could never be wrong, so let's dogpile on the first person to disagree.

[–] Septimaeus@infosec.pub 2 points 8 months ago

Maybe yeah. Also got the sense from the strong opinions that this is a preexisting debate, presumably in the context of continuous workloads or cached arrays with minimal spindown intervals. In that context it’s true that rotational disks still often win in energy efficiency and robustness (assuming we’re comparing them to consumer SSDs and not the latest enterprise u.2 stuff that’s rated for continuous work).