Powering 3 HDD's with external power

Question

I'm trying to connect 3 HDD's to my Pi3.

They are 2x 3.5" and 1x 2.5", all powered with a external power supply: https://www.inateck.com/inateck-ua1001-usb-3-0-to-ide-sata-adapter.html

It works if I only connect one drive, but as soon as I add a second one they stop working. They are all 1TB and perfectly work on my windows machine or if I disconnect the other ones.

Is there a way to tell the Pi not to power the Drives throught the USB?

Thank you in advance.

Are you doing hot swapping and plugging in and out of the USB with the Pi already booted and running? This post may provide some information about that topic https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=23205 — Richard Chambers, Sep 25 '17 at 20:48
See also this posting https://raspberrypi.stackexchange.com/questions/65995/how-can-i-control-power-to-a-usb-powered-device — Richard Chambers, Sep 25 '17 at 20:52
Another possibility is to use a USB cable that has the power leads in the cable cut so that it is data only. This article talks about doing so for a powered hub power back feed issue http://www.whatimade.today/how-to-protect-a-rasperry-pi-from-a-powered-usb-hub/ — Richard Chambers, Sep 25 '17 at 21:05
Does this answer your question? Can the Pi 4 power 2 external USB 3 HDDs? — Dmitry Grigoryev, Jan 17 '22 at 12:30

user2497 · Answer 1 · 2017-09-25T21:32:45.250

0

Use a Y-type USB cable

Power one male jack from a 3A power supply, another goes into the Pi. Expect 1-1.5A per drive to operate without problems. If you can’t readily or cheaply get such a high current supply for 5V, get a nice buck converter and use it with a laptop power brick.

edited Sep 25 '17 at 21:32

answered Sep 25 '17 at 18:23

user2497

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Powering 3 HDD's with external power

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