Do all external hard drives require a power supply with positive polarity?
Do all external hard drives require a power supply with positive polarity?
I am shopping for an AC/DC power adapter for an external hard drive, and I've noticed that the power supply required for the couple of the external hard drives I looked at is always with positive polarity. This made me wonder: Do all external hard drives require a power supply with positive polarity?
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I've never seen one that wasn't like that. 9V supplies usually have the opposite polarity, and there's 12V AC supplies too. I tag the plugs so I don't fry my hardware. And I pray that some standards organization will do something.
Don't worry, you just need to wait for the EU to mandate EVERYTHING run off usb-c.