USB HDD Power consumption

Raspberry Pi related support

USB HDD Power consumption

Postby mashman » 21 Feb 2015, 09:39

Hi All,

The B+ rPi is capable of allowing more current to the usb ports but as far as i can tell it is not set by default in rune.

When adding a 2.5 HDD that draws aprox 600mA, the rPi will croak unless you enable more current to the ports. This may be the case with some wifi cards and other devices as well. This is well documented elsewhere but I thought I'd mention it here. This may not be an issue for everyone as all HDDs are different and they have various levels of power consumption. I found with a portable Lacie drive that the networking and various other functions would timeout if the current draw was not set properly. It is also imperitve to have at least 2A for your 5v power supply but that is usually widely understood.

Here's how it is fixed.

SSH/putty into rune as root, enable the current with this command.
Code: Select all
[root@runeaudio ~]# echo max_usb_current=1 >> /boot/config.txt


There may be other opinions about this so read what others have to say about the matter before you go ahead and try this. This worked for me at least.

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Re: USB HDD Power consumption

Postby ACX » 21 Feb 2015, 19:34

Hi mashman,
thank you for the tip. We were indeed discussing it yesterday with hondagx35: he already included that line in his latest beta for Raspberry Pi 2.
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Re: USB HDD Power consumption

Postby frengo » 25 Sep 2016, 21:56

I have the same problem with ODROID C1 +.

You can tell me what to change to maximize the current on USB?

I bought this samsung HDD 2TB, 2.5 ': ... Sw2XFUbLsh

and I connected it to a USB port but it's not recognized by RuneAudio.

Thanks in advance.
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Joined: 04 Dec 2015, 19:03

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