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Mountain Of Code · Mar 9, 2026

Hard Disks Use A Surprising Amount Of Power

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It's been possible to spin down HDDs to save power forever, but does it actually make a meaningful difference? The drives in question are a pair of Western Digital 1TB drives. They're used for long-term storage and get very few reads/writes so could easily be spun down for 99% of the time without me noticing. From 64 W down to 58 W, about a 10% decrease. 3 W per drive, not loads but more than I…

Read on /hdd-power-usage

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