As per the title, I recently bought a Raspberry Pi 2 Model B and I thought it would be nice to have some extra space so I plugged my external HDD.

Here's the specs:

The HDD: HGST 0S03560 1TB 2.5 inch Touro Mobile Pro External Hard Drive

The power supply: CSL - microUSB Netzteil / Ladegerät (2100mA / 1000mA) | 5V DC USB

The OS: Raspbian

I would like to mention, that the Raspberry Pi works marvelously, powering the HDD is the only problem.

The HDD works well, on both 3.0 and 2.0 USB ports, on my laptop, desktop, TV, PS3, Wii.

Whilst on the Raspberry Pi, it spins for a few moments then stops, it alternates like this for as long as it's connected.

  • 2
    Are you aware of this issue, i.e., do you have max_usb_current=1 in config.txt?
    – goldilocks
    Commented Dec 22, 2015 at 0:39

2 Answers 2


You really want to power the Hard Drive from a powered USB HUB - what are the LEDs on the Pi-2 doing? I suspect you will find the one that indicates the Power is OK is telling you it is NOT.

  • I can't exactly see the leds, since the Raspberry Pi 2 is in a case. I'll try opening it tomorrow. I'll also try your advice with the powered USB HUB. Commented Dec 22, 2015 at 2:35
  • On the Pi2 low power is also indicated by a rainbow-coloured square in the top-right corner of the screen - and a red square indicates overheating - power down ASAP in that case.
    – SlySven
    Commented Dec 22, 2015 at 2:39
  • It never overheated before Commented Dec 22, 2015 at 2:41
  • 1
    Thank you for the welcoming, but I had an account here since a few months ago. I never overclocked it, I only set it to work on high(1000MHz) Commented Dec 22, 2015 at 2:46
  • 2
    That's overclocked, albeit within an officially sanctioned range.
    – goldilocks
    Commented Dec 22, 2015 at 9:55

Okay so the aforementioned answers may be easier, but what could work would be to splice a USB cord to only have the power cables connected to the male head and then have that plugged into a proper power supply. Or if you wanted to be boring you could just buy a USB "Y" cord.

  • I believe you can get ready made power-only Usb leads if that is what you mean?
    – SlySven
    Commented Jan 21, 2016 at 11:38
  • Yes. I mean it's relatively easy to make your own, but you'd need a "Y-shaped" USB cable where one of the heads only carries power Commented Jan 21, 2016 at 13:26

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