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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 07-05-2015, 07:33 PM   #1
L4Zer
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Do external hard drives run well with single board computers?


Hello

I don't remember which board it was or if it applies to all single board computers.

I remember I read somewhere an external hard drive connected to the USB on a single board computer cause it to reboot. I also read that the 5 Volt power supply may not have sufficient power to power up the external hard drive connected to the USB. Is this still true?

Last edited by L4Zer; 07-05-2015 at 07:35 PM.
 
Old 07-05-2015, 07:38 PM   #2
Keith Hedger
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Using a RaspberryPI as server with two external hard drives no problems, I wouldn't try to drive too much from the on board usb port but most external drives require an external psu anyway so no real problem.
 
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Old 07-05-2015, 07:45 PM   #3
L4Zer
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much appreciated

:-)
 
Old 07-05-2015, 07:51 PM   #4
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You can use a powered usb hub if the usb bus of the device doesn't provide enough current. I have both a docking station for large cheap 3.5" drives which has a power supply, and connects over usb and several powered usb hubs for usb powered drives. Both options work well on a raspberry pi B. Granted that the USB BUS speed keeps them under their full potential in most cases. But as long as you're not in need of speed, works just fine in my case. As to whether it works without additional powering depends on the drive in question and the sbc.
 
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Old 07-05-2015, 07:55 PM   #5
L4Zer
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I'm planning on getting a Banana Pro and I will connect only one hard drive. If it gives me issues than I will considered a powered USB hub.

Thanks
 
Old 07-06-2015, 05:43 AM   #6
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A nice trick, if you use a powered USB hub, is to plug the Pi into the hub as a power source. That way you only use 1 plug.
 
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Old 07-06-2015, 05:45 AM   #7
Keith Hedger
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Quote:
Originally Posted by 273 View Post
A nice trick, if you use a powered USB hub, is to plug the Pi into the hub as a power source. That way you only use 1 plug.
Now that's a good idea!
 
Old 07-06-2015, 05:53 AM   #8
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Quote:
Originally Posted by Keith Hedger View Post
Now that's a good idea!
I don't recall where I first saw the idea -- it's one of those things that's obvious when you read it but not necessarily obvious before that. I power mine from a powered USB3 hub attached to my Desktop PC, just to be confusing.
 
Old 07-06-2015, 03:10 PM   #9
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Be careful powering the pi with the powered hub that it's also using as a hub. There's a compatibility list of sorts. I use a USB plug thing for cell phones that is 1A for the B. Not sure if you need up to 3A for the 2. But the 1A ones are stylish in the bargain bin with zebra stripes or bedazzled and $5-ish. Not including the usb cable to power the pi.
 
Old 07-07-2015, 12:13 AM   #10
onebuck
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Member response

Hi,

Welcome to LQ!
Quote:
Originally Posted by L4Zer View Post
Hello

I don't remember which board it was or if it applies to all single board computers.

I remember I read somewhere an external hard drive connected to the USB on a single board computer cause it to reboot. I also read that the 5 Volt power supply may not have sufficient power to power up the external hard drive connected to the USB. Is this still true?
On my bench for my ARM systems, I use a AC Plugin multi-port USB power source that provides 2.5A total for the four ports. I sometimes use multiple USB multi-port power sources to drive the peripherals such as USB Drives or even external experiment boards that are interfaced with the SBC systems.

You can find these plugin power sources from most good hardware suppliers, even online.

If you do not supply enough current for the USB then that can cause issues with the system & peripheral equipment.

Hope this helps.
Have fun & enjoy!
 
Old 07-07-2015, 07:59 AM   #11
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Quote:
Originally Posted by Shadow_7 View Post
Be careful powering the pi with the powered hub that it's also using as a hub. There's a compatibility list of sorts. I use a USB plug thing for cell phones that is 1A for the B. Not sure if you need up to 3A for the 2. But the 1A ones are stylish in the bargain bin with zebra stripes or bedazzled and $5-ish. Not including the usb cable to power the pi.
I was under the impression that the 2 actually manages to use less power than the original B? But, yes, of course it is necessary to ensure that a powered USB hub with a decent power output is used. As I understand it the Raspberry-shaped one is actually designed to power the Pi as well as other peripherals.
 
Old 07-08-2015, 01:18 PM   #12
rtmistler
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Quote:
Originally Posted by 273 View Post
I was under the impression that the 2 actually manages to use less power than the original B? But, yes, of course it is necessary to ensure that a powered USB hub with a decent power output is used. As I understand it the Raspberry-shaped one is actually designed to power the Pi as well as other peripherals.
I like that Raspberry shaped one and yes it does power the Pi as well as other peripherals. Until ARM architectures are able to drive like 2 Amps via USB, they all really need external power for USB attached devices excepting small stuff like keyboards and mice.
 
  


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