Those are and have been the best choice but shipping cost was always steep.
There was a deal on Amazon before for $35 usd with free shipping but unfortunately to USA only. Its finished at the moment but might be back later...
Topic: 20 Port USB Hub Issues with Raspberry PI and Bitfury Twins (Read 2940 times)
There was a deal on Amazon before for $35 usd with free shipping but unfortunately to USA only. Its finished at the moment but might be back later...
This thread is over a year old...
Yes but still relevant. 
This thread is over a year old...
Those are and have been the best choice but shipping cost was always steep.
That hub puts out only 0.5A per port.
You should be getting half speed @ 2ghs, imo.
You can't use the hub. Something like orico would work wonders.
Or you could buy eyeboot's hubs they work great up to 49 TFs.
You should be getting half speed @ 2ghs, imo.
You can't use the hub. Something like orico would work wonders.
Or you could buy eyeboot's hubs they work great up to 49 TFs.
Yeah I would suggest a couple of these bad boys:
http://www.eyeboot.com/10-port-usb-hub
It can deliver close to 2 amps on 5 of the ports
It runs for 24hours with 4 miners without interruption.
If i add 2 more miners raspberry pi freezes after 30~40 minutes of operation.
If i add 2 more miners raspberry pi freezes after 30~40 minutes of operation.
60
It seems that i will run for much longer with less number of devices.
I think this hub it is defective by design and cannot provide more power to each of the usb than
0.5Amp.
The power supply which is used is 12V DC, 5A. Shall i try it with a stronger power supply?
I may give it a try with dwc_otg.speed=1.
If it runs longer with fewer miners then it is almost certainly a hub power problem. 12V*5A = 60W = 3W/port = 600mA/port MAX (assuming 100% efficient power conversion). So it seems that the hub is designed to only deliver 500mA/port.It seems that i will run for much longer with less number of devices.
I think this hub it is defective by design and cannot provide more power to each of the usb than
0.5Amp.
The power supply which is used is 12V DC, 5A. Shall i try it with a stronger power supply?
I may give it a try with dwc_otg.speed=1.
I doubt a bigger 12V power supply will work as the 12V - 5V conversion in the hub is going to be the limiting factor.
Now i am encountering the following issue.
The raspberry pi hangs and the mining stops after one hour of operation.
Do you have any oppinion regarding this?
Is the dwc_otg.speed=1 the solution to this problem?
The raspberry pi hangs and the mining stops after one hour of operation.
Do you have any oppinion regarding this?
Is the dwc_otg.speed=1 the solution to this problem?
Any details on the power supply driving the hub? My recollection is that you should
plan on a minimum of 1A @5V for each BiFury when running at it's normal low clock
speed. I think it can go as high as 1.8A.
A few other debugging thoughts:
- How long will it run with just 1 BiFury plugged in?
- How long with two?
- How long with three?
If shrinking the number of BiFurie's makes things better, think power for the hub.
plan on a minimum of 1A @5V for each BiFury when running at it's normal low clock
speed. I think it can go as high as 1.8A.
A few other debugging thoughts:
- How long will it run with just 1 BiFury plugged in?
- How long with two?
- How long with three?
If shrinking the number of BiFurie's makes things better, think power for the hub.
It seems that i will run for much longer with less number of devices.
I think this hub it is defective by design and cannot provide more power to each of the usb than
0.5Amp.
The power supply which is used is 12V DC, 5A. Shall i try it with a stronger power supply?
I may give it a try with dwc_otg.speed=1.
Did you already set " dwc_otg.speed=1 " ?
http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=53832
http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=53832
That hub puts out only 0.5A per port.
You should be getting half speed @ 2ghs, imo.
You can't use the hub. Something like orico would work wonders.
Or you could buy eyeboot's hubs they work great up to 49 TFs.
You should be getting half speed @ 2ghs, imo.
You can't use the hub. Something like orico would work wonders.
Or you could buy eyeboot's hubs they work great up to 49 TFs.
Any details on the power supply driving the hub? My recollection is that you should
plan on a minimum of 1A @5V for each BiFury when running at it's normal low clock
speed. I think it can go as high as 1.8A.
A few other debugging thoughts:
- How long will it run with just 1 BiFury plugged in?
- How long with two?
- How long with three?
If shrinking the number of BiFurie's makes things better, think power for the hub.
plan on a minimum of 1A @5V for each BiFury when running at it's normal low clock
speed. I think it can go as high as 1.8A.
A few other debugging thoughts:
- How long will it run with just 1 BiFury plugged in?
- How long with two?
- How long with three?
If shrinking the number of BiFurie's makes things better, think power for the hub.
The hub works well for about 20 minutes with cgminer 4.3.0 in Windows.
Now i will try to compile the latest version of cgminer on minepeon and run it from there!
Now i will try to compile the latest version of cgminer on minepeon and run it from there!
I'm now trying again on windows with the latest ver of cgminer and will let you know!
there's an old USB HUB thread with reviews on all kinds of hubs. you should search the forums to find it.
this particular hub sucks.
this particular hub sucks.
What alternative could i use ?
Beaglebone I guess or pcIs Beaglebone relieved from these kind of issues?
Ps i am refereeing to bb black
What alternative could i use ?
Beaglebone I guess or pcIs Beaglebone relieved from these kind of issues?
I have used a d-link h4 and then the hub but the same results. Although it seems that it works on a windows version of cgminer.
You using the same version of cgminer on the pi and windows? Did you compile cgminer yourself on the pi?
I have tried the same version both on windows an rpi yes.
What alternative could i use ?
Beaglebone I guess or Linux pc 
BFGminer would work.
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