papampi
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Linux FOREVER! Resistance is futile!!!
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May 13, 2019, 06:04:14 AM
Last edit: May 15, 2019, 12:28:40 AM by frodocooper Merited by frodocooper (2) |
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Yeah I don't have easy access to my a921 and have not upgraded it at all since the posts I did here a while back.
Same here, I'm going to image an sd card and send it to my rigs location to test.
Just remote update the latest MM, and its giving me 0 hash rate. Reverted back. |
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Each block is stacked on top of the previous one. Adding another block to the top makes all lower blocks more difficult to remove: there is more "weight" above each block. A transaction in a block 6 blocks deep (6 confirmations) will be very difficult to remove.
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PassThePopcorn
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May 15, 2019, 02:30:58 PM
Last edit: May 16, 2019, 12:05:31 AM by frodocooper |
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Sometimes the MM and pi software won't work together, once the pi is updated the latest MM should work and display the proper hashrate. I've noticed that even if it says 0 it is still doing something, but not being able to see the hashrate can cause tracking problems.
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papampi
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Linux FOREVER! Resistance is futile!!!
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May 15, 2019, 04:09:52 PM
Last edit: May 16, 2019, 12:05:55 AM by frodocooper |
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I had 10 units connected to the pi with 20181011 image. Updating MM to 2019-03-04 caused the pi to only show 3 on each connector instead of 5 and 0 hash rate.
Will test again with new pi image when I visit them.
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Trinislacker
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May 20, 2019, 11:05:02 PM |
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Hey Guys,
Can the same controller for an 841 be used for a 921 simultaneously?
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papampi
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May 21, 2019, 10:25:12 AM
Last edit: May 22, 2019, 10:25:17 AM by frodocooper |
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From what posted at Blokforge it seems it can be used: Controller comes with latest firmware for 821 / 841, can be easily flashed for 721 /741 or the 921...
Also, it is recommended to use up to 20 AvalonMiners 721 / 741 /821 / 841 / 921 with this unit.
Or may be it meant you need to flash it again and use it for them. |
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HagssFIN
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Electrical engineer. Mining since 2014.
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May 21, 2019, 10:44:00 AM |
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It is recommended to have a dedicated Rasp Pi for each different Avalon generation.
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philipma1957 (OP)
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'The right to privacy matters'
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May 21, 2019, 01:33:50 PM
Last edit: May 22, 2019, 10:26:01 AM by frodocooper |
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You can have two os cards. But only one at a time will work.
If you have two different models you will need two rasp pis. I am running a pair of a721 and a a921.
I have two rasp pi each with its own sd card.
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notabeliever
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May 22, 2019, 04:58:23 AM |
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On the same note can 1 controller using the latest firmware, run 5 connected miners setup with different dated MM Firmware.
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philipma1957 (OP)
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'The right to privacy matters'
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May 22, 2019, 12:35:06 PM |
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On the same note can 1 controller using the latest firmware, run 5 connected miners setup with different dated MM Firmware.
Most likely no as in my case with 2 units it was a no go and some one else could not get two or three a921's to play nice. but I suspect that some pairings of different mm firmware could work together . It would depend on how the changes in a different pair work together. Zero proof on that guess. Two cases that separate MM firmware did not work together |
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minefarmbuy
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We are not retail.
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May 22, 2019, 07:03:37 PM |
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I wonder if the best way to try it would be with 4 chains separated by the MM firmware but you'll need more AUC3's and with five units on one controller would have to likely have two on one chain.
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papampi
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Linux FOREVER! Resistance is futile!!!
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May 23, 2019, 08:03:28 AM
Last edit: May 23, 2019, 12:19:42 PM by frodocooper |
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I just checked my A921 MM versions and noticed I have a mix of 9211809-b4b3d00 and 9211809-b150820 on each RPi.
Any suggestions which is better? And is it better to upgrade them and use same MM on each RPi?
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genza111
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June 24, 2019, 05:36:55 AM |
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hi guys, tell me, please, will they work on one Raspberry Pi3 a920P and a921?
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papampi
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June 24, 2019, 06:39:15 AM
Last edit: June 26, 2019, 03:50:18 AM by frodocooper |
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I can confirm a921 works on RPI 3 but not on RPI 3 model B+
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genza111
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June 24, 2019, 08:10:11 AM
Last edit: June 26, 2019, 03:50:32 AM by frodocooper |
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the question is whether the a920 and a921 are working on one RPI3?
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papampi
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June 24, 2019, 08:18:44 AM
Last edit: June 26, 2019, 03:50:44 AM by frodocooper |
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Usually its better not to mix them on one RPi
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notabeliever
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October 21, 2019, 08:57:35 PM
Last edit: October 31, 2019, 01:41:14 AM by notabeliever |
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Okay burned out my Cooling fan. Apparently its a 2+2 pin type and not the typical pwm-4pin one for most miners. Anyone know who sells these besides Alibaba.
Any of the distributors carry cooling fans for the A921?
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NotFuzzyWarm
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October 21, 2019, 11:18:36 PM
Last edit: October 21, 2019, 11:54:24 PM by NotFuzzyWarm |
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Okay burned out my Cooling fan. Apparently its a 4 pin type and not the typical one for most miners. Anyone know who sells these besides Alibaba.
Any of the distributors carry cooling fans for the A921? Check Canaan's website for the distributor closest to you and get one from them. Make sure they know you want a fan for the 921 as most sites only list the A6-8 series fans. The 921 uses a 140mm fan - not a 120mm one like the A6/7/8's, & s9's etc use. Just looked at one of my idle ones and it is an AVC model DBPC1438B2H takes 12v @ 4.6A Hmm. Seems someone has a youtube vid on how to repair similar ones so maybe give it a try? https://www.youtube.com/watch?v=qQkaGyoDWBQ |
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notabeliever
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October 22, 2019, 01:53:16 AM |
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Yes thanks working with Blokforge
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papampi
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Linux FOREVER! Resistance is futile!!!
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January 24, 2020, 07:55:39 AM
Last edit: January 25, 2020, 03:27:23 AM by frodocooper Merited by frodocooper (3) |
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I just updated my A921 controller units with the nicehash firmware and latest MM, it's really good. No more rejected shares at all. Nicehash firmwareLatest MM |
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grompapa
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February 06, 2020, 02:52:51 AM |
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I want to try maximum energy efficiency watt/th.
How can I lower the frequency on avlon 921???
Share your experience. What is your best result?
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