Possibly found the maximum number of Block Erupters you can run off a RPi

[mrbill]

Have a standard RPi Model B (512M), running off a 1A HP (phone charger) power supply. This is connected to one of the ASICMINER 49-port USB hubs, that is in turn powered by a 550W ATX PSU.  I plan on powering the Pi and the BFL unit from the ATX PSU once I can get the proper cables.

With 40 Block Erupters and one ~7.5GH BFL Jalapeno plugged into the hub, the Pi handles ~22GH total just fine, for about eight hours running the latest BFGMiner compiled from source.

After around eight hours, even with updated firmware installed, something triggers a USB bug and the ethernet adapter (I'm using wired network) spazzes out and drops connection.  Settings and tweaks and overclocking make no difference.  I tried running with just the Block Erupters and not the BFL unit, and I'm going on almost 36 hours now with no hangs or drops.

No idea if the RPi will handle a hub full (49) of BEs, but it handles 40 of them beautifully (in addition to three USB-powered fans also in the hub).
Looks like I'll just have to grab another one of my Pis and set it up dedicated to the Jalapeno.

[jojo69]

pics or it didn't happen

[mrbill]

Of course.    Gladly take some tonight when I get home.