Thanks for the vid, was interesting.
Regarding the USB configuration, can you tell me more about how you wired up the 49 port hubs? Are you using the modified cgminer on the laptop to address all the GSDs in the whole rack?
1. With the 49 port hub I placed 40 Gridseed in each of my two hubs. Then both of the hubs are plugged into one Laptop. A single Raspberry Pi can only handle I think 30 or so at a time. And I wouldn't recommend running more then 20 on a RPi. So I used a laptop. My only fear was that my older laptop would run into problems with all those interrupts luckily it detected all the devices and so far hasn't had a single problem!
I recommend doing something like that if you are going to have a lot of GridSeeds or planing on having a lot. Its a lot easier to setup. You dont have to worry about 8 separate power cables and 8 separate USB cables. And thats without including the 16 power cables for 16 power supplies for the 8 units. Again I am thinking of putting 10 per powersupply because I am only mining scrypt.
2. The laptop is running OpenSuSE 13.1 (My fav. Linux distro for Desktop/Laptop use.. I may switch to a more lite weight distro in the future.
3. I am using cgminer 3.7.2 with the gridseed asic header files. I *think* I got it from here:
https://github.com/dtbartle/cgminer-gc3355I forgot though what github I used. But I did download from a git repo. Once I get home I can double check. Either case I downloaded and compiled cgminer 3.7.2 from github. Works like a charm.
P.S: Check this link out:
http://zoomhash.com/collections/top-sellers/products/12v-to-6-pin-pci-e-psu-molex-gridseed-adapter-power-up-to-3-gridseed-asicsYou can now easily convert your power supply for use. With a molex to PCI adapter you can have a single power supply power 20/30 of them. Just food for thought. The idea being that who needs all that extra equipment. No need for extra block interrupters or RPis and such. Just grab any old power supply. An old laptop and some block interrupters you can buy on amazon if you dont already one one and then you can just buy the gridseeds by themselves. Which is what Hashra is now selling. For cheaper then ZoomHash I might add.
Although I do not know if they now ship quick or not. If someone has ordered within the last week and has gotten a tracking # or there equipment then plz post about it!