The RPi is a toy and a piece of shit. Why anyone would run thousands of dollars worth of equipment off it is beyond me. Toss it and connect your devices to a real PC or laptop.
+1 
This. I have 5 of them that I've been using to run my other miners (BFL and BitBurners) and they are notoriously unreliable. Every once in a while the SD cards will die necessitating a rebuild of the whole image. And the USB ports are the worst. Even with a powered hub they aren't able to drive my bitburners anymore and I ended up having to buy a tiny computer and putting Linux on it.
Wow all this hate for the RPi, not sure but they just work for me? I use the MinePeon distro and get months of uptime no problem with my BFL & BitBurner Fury stacks. Maybe I got lucky with good SD cards? Maybe the MinePeon distro is configured to write less data to "disk" and extends the life? I dunno.
But compared to spending $200-500 on a Mac Mini or using an old laptop and having to manage a huge spiderweb of USB hubs off the back and multiple cgminer configs I think I'll stick with my RPi's thank you very much (note I NEVER use usb hubs). One dies? I have a spare. SD card were to die? I have an image I can just reload on a new one and go. And I get to build fun little cases for them out of the old box of legos I have laying around
How do you drive a stack of 8 bitburner boards without a USB hub?? I've never gotten the CANBUS to work with more than 4 at a time and even then it is extremely unreliable. I have 16 bitburner boards and use 2 7-port hubs. I used various raspberry pis to drive them for a month or so, but with tons of USB errors and reduced performance. Its a known bug that the power supply circuitry on the raspberry pi is not enough to drive the USB ports up to spec, even when using powered hubs. It is so bad that people even have problems with certain brands of USB keyboards and mice.
I eventually got a $150 computer from Intel to run all 16 of my bitburners, http://www.amazon.com/gp/product/B00B7I8HZ4/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1 and I'm MUCH happier now. I still use 3 other raspberry pis to run my BFLs and they are fairly reliable, although I've had to the replace the SD cards on two of them in the past 6 months they've been running. I really like the raspberry pi and I wish they worked better but they aren't quite reliable enough to control bitcoin miners.