Hi,
Maybe a weird question, but is there a limit on the amount of Block Erupters cgminer is able to run? I'm asking this because I'm trying to set 98 up, (2x49port hubs) and it doesn't work.
When I connect hub 1 (with 49 BE's) it's fine. When I disconnect 1 and connect hub 2, it's fine. (so it's not a power issue, both are powered by an ATX supply with 30a on 5v) When I connect both of them at the same time, cgminer tells me it can't find any device and it's waiting for a hotplug.
When connect 1 full and a couple on the 2nd hub, it works. cgminer crashes on hotplug, so I have to close it, add more, and restart it. This works until I have 59. 59 is fine, 60 gives this error. I've tried putting the 60th in different usb ports (also on the laptop host itself), also other sticks, but it just won't accept 60 or more.
This is the behavior on cgminer 3.6.4, 3.7.0 and 3.7.2 (and often, 3.7.2 crashes after 1 or 2 minutes regardless of how many I've attached)
Using windows 7 64bit
Any advise?
Unless I misunderstand how you are wiring it up I would say maybe the Power supply doesn't like working at >100%.
I came to that number based on 60 erupters at .5 amp being 30A and I would have to guess the hub would waste some amount of power. I also have 0 idea how long your cables connecting to the power supply is but at 30A you should have a really short run and large cable.
But I can't figure out why one on the laptop port wouldn't work. I would have taken a shot at it earlier but I didn't see anything obvious unless you only use 1 power supply. Even then your laptop may not provide the full .5 amp without too much voltage sag. Laptops are usually not as powerful on the usb ports. But I know by spec it should work......
EDIT: by I misunderstand how you are wiring it up I mean that you say you have 2 hubs and one power supply. Possibly you wanted to convey a power supply per hub. I made the assumption that you had one power supply per hub the first time I read it as you would be woefully under powered otherwise.
