Quote from: MScFW on July 06, 2014, 03:34:27 PM

Quote from: 5ick3uffalo on July 06, 2014, 02:50:34 PM

Hi, to understand this little better technology wise.

First i had only 5 Gridseeds, now 11 Gridseeds with one RasBerry PI mining on wafflepool.

Before with 5 Gridseeds i was stable with 850 MHZ setting, now i can not go 850 MHZ anymore i would end up with a few hundered HW-Errors. It is other pools also.

With 800 MHZ its perfecly fine with very few Hardware Errors.

Has this to do because now the RasBerry must handle more Gridseeds now?

And how many Gridseeds my RasBerry could handle maximum? 20? (11 Now)

PS: I´m using hashra-image.

Hi 5ick3uffalo,
I had something similar issues a while ago. Unfortunately there is no easy - go that way - answer.
Things I tried/changed with sucess:

a reliable USB hub, may sound strange, but 3 out of 4 cheap ones didn't do the job very well in a 24x7 solution
tried several PI solutions for Gridseed and finally found Minera (https://bitcointalk.org/index.php?topic=596620.0), based on CPUMiner
- Autotuning support for the Minis
- Autorestart of miner if a device stops
I'm more than happy with it, 24, 48h with <1% HW-Errors and <1% rejects. But it doesn't like some pools!
Added some additional safety lines to the PI system
- slub_debug=FP in /boot/cmdline.txt
- BMC2708 hardware watchdog, just in case

I do no longer need a regular reboot. Give it a try (In v0.2.3 you can remove the donation pool from the UI)

bye

Thanks

Before with 6 Gridseeds (where it was running stable @850MHZ) i used powered D-Link Hub (which many say is very good)

I bought a complete package (5 Gridseeds, all cables, industrial A/C) and it came with a LogiLink (UA0125) powered USB 2.0 8Port-HUB also ( paid 200 for everything, which i think was OK)

Not sure if this Logilink Hub is the culprit, i try the Minera Image first.

With 800Mhz it is running amazing, though. But i want it stable @850

I tried so many pools, but always come back to wafflepool Grin