[BOUNTY 0.1 BTC] is possible a rig with a Raspberry PI and 49 Block erupter USB?

[tk1337]

Running 20 currently, waiting for the rest of the hubs to come in.

Best hub for $/per port I found was Rosewill RHB-500 (10 port, 8 usable. $22 @newegg.com), I tried the D-Link 7-Port, only seemed like 5 were usable, I tried a few other hubs (got about $120 in hubs to return at the moment), so far the Rosewill RHB-500 has been the best. I plan on maxing trying to max it out on the one rPi to see how many I can get going just with one rPi with MinePeon.

Some pictures of my setup (not complete & dark, made from a NZXT Phantom case I had laying around), this setup is running MinePeon 0.2.3a (with some added stuff), still not done modifying the case, going to cutout a space for an lcd display on the side, remove the bay hard-drive bay (currently the rPi is sitting there, it will get moved to the back) to fit more hubs & fans, the PSU is getting switched out for one with less of a power draw (psu only controls the fans atm, it was all I had without ordering something).
- Raspberry Pi Model B
- ATXRasPi board (addon for rPi)
- Currently 3x Rosewill RHB-500 10-port hubs
- Currently 20x erupters
- Some erupters have heat-sinks, some do not.





Here's my test Pi, running raspbian w/4 erupters.





** Edit **
I did forget to put in one thing, every time I try to use a USB Wifi and try to connect to it using 'sudo wicd-curses' it completely locks up I've tried it with the USB Wifi on a hub, on a hub replacing an erupter, on the 2nd USB port of the rPi, always fails. I want to try a different wireless manager for arch, but haven't got around to it yet, mainly because I have wireless-to-ethernet adapter (Trendnet TEW-647GA) which makes it still wireless, but wired to the rPi).

[acuraxl]

Cool setup, I have about 24 erupters on a single usb port. originally had an edimax wifi and bluetooth dongle, it works fine, but what i found is these usb devices made load increase by 2 which made it slow,  After i took the wifi and bluetooth dongle out the load avg came down to 4.5, i'm running latest raspbian with rpi-update firmware.  I'm not sure if the MinePeon has the same issue.

[tk1337]

Switched to BFGMiner...

haven't had any issues, wireless usb now works, bluetooth usb now works, avg cpu load is <=20% versus about 100-140% average with CGMiner.

Guess the miner makes the difference after all...

[acuraxl]

Right now my cpu utilization stays around 20-28%, That interesting your getting that high of cpu utilization, perhaps your using the older cgminer, i'm using cgminer 3.4.2 and its very stable. I know i had similar problem using older cgminer.  what i mean by the load average are the load average numbers that appear after you type the command

Code:

uptime 

should have similar result like I have here
07:23:28 up 4 days, 12:02,  2 users,  load average: 4.42, 4.65, 4.82

I could have add those wifi and bluetooth, it wouldnt effect the cpu utilization just load average.

below is an article that explains in a bit more detail
http://blog.scoutapp.com/articles/2009/07/31/understanding-load-averages

[tk1337]

Right now my cpu utilization stays around 20-28%, That interesting your getting that high of cpu utilization, perhaps your using the older cgminer, i'm using cgminer 3.4.2 and its very stable. I know i had similar problem using older cgminer.  what i mean by the load average are the load average numbers that appear after you type the command

Code:

uptime 

should have similar result like I have here
07:23:28 up 4 days, 12:02,  2 users,  load average: 4.42, 4.65, 4.82

I could have add those wifi and bluetooth, it wouldnt effect the cpu utilization just load average.

below is an article that explains in a bit more detail
http://blog.scoutapp.com/articles/2009/07/31/understanding-load-averages

Negative, 3.4.1 was so far the most stable for me, when upgraded to 3.4.2 problems started, then 3.4.3 problems became worse... still running BFGMiner with not a single issue.

[Bonz]

Best hub for $/per port I found was Rosewill RHB-500 (10 port, 8 usable. $22 @newegg.com),

Just ordered one can't wait to give it a try on my minepeon pi i'm tired of using my desktop

[-ck]

Negative, 3.4.1 was so far the most stable, when upgraded to 3.4.2 problems started, then 3.4.3 problems became worse...

That's a most interesting observation since the only code difference between 3.4.1 and 3.4.2 was code affecting the BFL SC devices.

[tk1337]

Negative, 3.4.1 was so far the most stable, when upgraded to 3.4.2 problems started, then 3.4.3 problems became worse...

That's a most interesting observation since the only code difference between 3.4.1 and 3.4.2 was code affecting the BFL SC devices.

Not sure what to tell ya man, the only difference between the setup would be switching cgminer to bfgminer...

The odder part about it is the fact when comm errors were being generated by say adding in another hub, bfg had no issues with it. I originally thought a few hubs I bought had some strange circuitry going on, as while being 5v 3.5a and 5v 4a, *should have* had enough power yet comm errors would start showing after plugging 4 erupters on those hubs w/cgminer.

I wish I had some log files for you, but I couldn't find anything about the crashes within the system logs on the rPi, it's kind of like when it crashed it just completely halted, since the rPi has no RTC, say the crash happened at 23:39, well, looking at the logs it would basically skip 23:39 every where and see the last written as 23:42 (after reboot) and before that at like 23:38... but nothing before that (was expecting to see a backdated log entry due to the lack of RTC).

[-ck]

Negative, 3.4.1 was so far the most stable, when upgraded to 3.4.2 problems started, then 3.4.3 problems became worse...

That's a most interesting observation since the only code difference between 3.4.1 and 3.4.2 was code affecting the BFL SC devices.

Not sure what to tell ya man,

Wasn't talking about any of the other comments, just that the code for erupters and cgminer is identical from 3.4.1 to 3.4.2, making the association one of coincidence. Not saying it didn't happen, just saying whatever it was got worse for you coincidentally.

[Bonz]

Negative, 3.4.1 was so far the most stable, when upgraded to 3.4.2 problems started, then 3.4.3 problems became worse...

That's a most interesting observation since the only code difference between 3.4.1 and 3.4.2 was code affecting the BFL SC devices.

Not sure what to tell ya man,

Wasn't talking about any of the other comments, just that the code for erupters and cgminer is identical from 3.4.1 to 3.4.2, making the association one of coincidence. Not saying it didn't happen, just saying whatever it was got worse for you coincidentally.

are you both running the same os? and version?

[polarhei]

Yes, it is suggested to use usb 2.0 hub to do the thing.