Title: USB hub problem Post by: WinterStorm on November 06, 2013, 03:03:58 AM Hello,
I have 2 erupters plugged directly into my computer (Ubuntu server 12.04.3) and 3 more plugged into a USB hub (that uses a power adapter) that are also connected to that computer. When I run cgminer it detects all 5 erupters and they appear to work. Under /dev it lists all 5 erupters. /dev/ttyUSB0 /dev/ttyUSB1 /dev/ttyUSB2 /dev/ttyUSB3 /dev/ttyUSB4 However, when I visit my pools website it only shows approximately 650 Mh/s. It appears as though the erupters plugged into the hub are not registering with my pool. I also tried setting up p2pool.info with similar results so I don't think this is a problem with the pools. I tried taking one of the erupters out of the hub and plug it directly into my computer and my hash rate jumped to about 1 Gh/s so the erupters work but for some reason something is happening with the hub? Anyone have any ideas why those 3 erupters in the hub are not working or why their work is not being sent to my pool? Thanks Title: Re: USB hub problem Post by: WinterStorm on November 06, 2013, 11:12:00 PM I bought a new USB hub (ORICO P10-U2 10 port) and everything is working now.
Title: Re: USB hub problem Post by: os2sam on November 07, 2013, 02:55:50 AM BE's draw .5 Amp each. So you need to make sure your hub power supply can supply that much power to them. 3 BE's would require 1.5 Amp @ 5 Volt, 2 Amps would be more better.
Title: Re: USB hub problem Post by: ChazM on November 07, 2013, 04:12:05 AM Similar issue, I found the Saitechi one I bought to be very flaky. Depending on the particular bootup of BFG miner, I can get anywhere from 9-300Mh/s (averages about 120) on a single stick ( got it to run 3 at full speed, but the port arrangement and sticks used are probably random), and my errors get near 75% after about 15 minutes on all five. I know it's not the erupters, they run fine in my computer.
Title: Re: USB hub problem Post by: os2sam on November 07, 2013, 04:16:50 AM I don't know how many Erupters you have. But I had the best luck with the Rosewill 5/7 port hubs. It has 5 powered ports with a 2 Amp power supply. I ran 4 erupters on each one with no issues.
I also tried 3 of the Anker 9+1 hubs, one works perfect the second is flaky unless it is plugged into a Rosewill hub and the third fried in less than 24 hours. I haven't used the DLink you asked about so I don't know. Title: Re: USB hub problem Post by: ChazM on November 07, 2013, 04:29:48 AM I had a second look at that one, doesn't look like it has external power. (and on newegg it does, perhaps I'll try that one tomorrow) I haven't really bought anything from Rosewill. I always wonder if they're cheap or inexpensive.
Title: Re: USB hub problem Post by: os2sam on November 07, 2013, 04:42:20 AM I had a second look at that one, doesn't look like it has external power. (and on newegg it does, perhaps I'll try that one tomorrow) I haven't really bought anything from Rosewill. I always wonder if they're cheap or inexpensive. The ones I got have magnets on the bottom so they stick to the computer case really well. I like them allot. They are USB 2.0 so you can't hook up a bunch of hard drives to them. I have been underwhelmed by the Anker's, they're crap. |