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Author Topic: Antminer S5 loses connection - Burns itself to death  (Read 4560 times)
SEGMining
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July 01, 2015, 04:40:24 PM
 #41

So the issue is that when they lose their internet connection (ie, switch or dns fails or it runs out of backup pools) the chips stay on for some reason?  Eventually burning up the hardware?

Are there other symptoms?  Like, the unit is on and not responsive to pings or the WebUI is not accessible? 

If so, this is troubling because we host a large number of S5s that are super finicky, they randomly just stop working even with stable networking and power and require a hard reset and costs me a lot of man hours resetting these things.  Also, this behavior does not seem to be heat related.

Lets start a list of firmware versions that this is happening with.

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July 01, 2015, 05:03:25 PM
 #42

So the issue is that when they lose their internet connection (ie, switch or dns fails or it runs out of backup pools) the chips stay on for some reason?  Eventually burning up the hardware?

Are there other symptoms?  Like, the unit is on and not responsive to pings or the WebUI is not accessible? 

If so, this is troubling because we host a large number of S5s that are super finicky, they randomly just stop working even with stable networking and power and require a hard reset and costs me a lot of man hours resetting these things.  Also, this behavior does not seem to be heat related.

Lets start a list of firmware versions that this is happening with.
I haven't heard anything from Bitmain or doggie so I would say it safer to assume all firmwares are currently affected and the only safe method is the fan mod someone described.














 

 

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July 01, 2015, 07:11:29 PM
 #43

Bitmain support emailed me with a link for a firmware they are currently putting through internal testing, that should resolve the overheating issue when the internet connection goes down.

I'm not brave enough to try out the firmware (My current S5's have been running fine and have added pull fans), but just a heads up for everyone looking for answers on this issue, it appears something should be officially released in short order.

I would rather not share the link for privacy reasons or feel responsible for inadvertently bricking someones unit.

"Soon".
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July 01, 2015, 08:39:38 PM
 #44

Bitmain support emailed me with a link for a firmware they are currently putting through internal testing

Same on S4+ firmware, I have a copy but its not been tested extensively yet.

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July 02, 2015, 03:53:59 AM
 #45

So the issue is that when they lose their internet connection (ie, switch or dns fails or it runs out of backup pools) the chips stay on for some reason?  Eventually burning up the hardware?

Are there other symptoms?  Like, the unit is on and not responsive to pings or the WebUI is not accessible? 

If so, this is troubling because we host a large number of S5s that are super finicky, they randomly just stop working even with stable networking and power and require a hard reset and costs me a lot of man hours resetting these things.  Also, this behavior does not seem to be heat related.

Lets start a list of firmware versions that this is happening with.
I haven't heard anything from Bitmain or doggie so I would say it safer to assume all firmwares are currently affected and the only safe method is the fan mod someone described.

Dogie - do you have any insight on affected firmware versions?

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July 02, 2015, 06:06:58 AM
 #46

Bitmain support emailed me with a link for a firmware they are currently putting through internal testing, that should resolve the overheating issue when the internet connection goes down.

I'm not brave enough to try out the firmware (My current S5's have been running fine and have added pull fans), but just a heads up for everyone looking for answers on this issue, it appears something should be officially released in short order.

I would rather not share the link for privacy reasons or feel responsible for inadvertently bricking someones unit.

"Soon".

Bitmain support emailed me with a link for a firmware they are currently putting through internal testing

Same on S4+ firmware, I have a copy but its not been tested extensively yet.

My units are doing this same thing. Lets hope to see the new firmware out soon.

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July 02, 2015, 07:41:45 AM
 #47

Bitmain....fix that!  Angry

Bitmain... Please also fix (if it is possible at all) the issue when chips stay loaded with some usleless calculations while cgminer can't get any work from pool due to Internet connection absence.

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July 05, 2015, 12:04:25 AM
 #48

In the meantime


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July 05, 2015, 10:45:57 AM
 #49

Great job! You should write what you did for everyone that want to resolve issue with self burning devices. You unpluged PWM from 4 pin fan connector?

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July 05, 2015, 03:51:53 PM
 #50

It shouldn't heat up if it looses internet connection, it makes no sense. I guess that unit goes into some kind of loop... But why besides that it didn't shut down >80c is beyond me...

Review the S5 thread. Sorry to hear this happened and lucky a fire didn't start or burn your place down. I reported this last March in the S5 thread. Bitmain has given me a "new" firmware but since I have all my fans directly connected now and the smits firmware is working good I'm just going to keep them the way they are. Especially in this NJ heat. Anything related to this bug should be looked at by Bitmain very closely. You should not have to re-arrange your fan configuration from stock if everything was working correct.y

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July 05, 2015, 03:54:05 PM
 #51

I'll cut the blue wire on my S5s fan first thing tomorrow morning...

It's a little annoying if I have to sell them in the future, but I prefer that than the risk of frying them! I'll make an adapter for my next S5s (Material's coming in 3 weeks... !)

Don't cut! Be easier to buy a little tool to get the pins out, so you can put them back in if you want to re-sell.

Something like this.

http://www.amazon.com/mod-smart-Full-Removal-Tool/dp/B001KQDS6G


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July 05, 2015, 03:57:31 PM
 #52

So the issue is that when they lose their internet connection (ie, switch or dns fails or it runs out of backup pools) the chips stay on for some reason?  Eventually burning up the hardware?

Are there other symptoms?  Like, the unit is on and not responsive to pings or the WebUI is not accessible? 

If so, this is troubling because we host a large number of S5s that are super finicky, they randomly just stop working even with stable networking and power and require a hard reset and costs me a lot of man hours resetting these things.  Also, this behavior does not seem to be heat related.

Lets start a list of firmware versions that this is happening with.


https://bitcointalk.org/index.php?topic=902305.msg10833820#msg10833820

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July 05, 2015, 06:36:21 PM
 #53

Great job! You should write what you did for everyone that want to resolve issue with self burning devices. You unpluged PWM from 4 pin fan connector?

Just like opentoe said:

Don't cut! Be easier to buy a little tool to get the pins out, so you can put them back in if you want to re-sell.

But I used the sharp tool in the picture to push the pin out of the connector. It took me seconds to safely get it out without cutting the wire. Then I used black adhesive tape to isolate the pin.


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August 03, 2015, 03:28:37 PM
 #54

Quote
Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz

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August 03, 2015, 03:32:52 PM
 #55

Quote
Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz
anyoane tested the shit?

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August 03, 2015, 03:41:02 PM
 #56

Quote
Update:
1.User defined fan speed;
2. Interval of detection time for high temperature protection is 2S after the first alarm;
3. Process optimized of miner's status;
MD5: 1579E8B4035FC1FD85A1B2F6B5A8EFB4

https://www.bitmaintech.com/files/download/SD-S5-20150715-fan_ctrl.tar.gz
anyoane tested the shit?

I'm getting my hand on an Antminer S5 and i would very much like to know if there was a firmware solution or if that fan control properly operate when there is a lost of internet connection. Full fan control also sound great to wind down the fan a bit? No need for 4k rpm if the unit is in mid 50s C imo.

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August 03, 2015, 04:52:06 PM
 #57

Just tested the new firmware on an S4+, fan control works.
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August 08, 2015, 10:00:34 PM
 #58

In the meantime

 Not quite identical to how I did mine, but close enough folks might mistake our miners for being modded by the same person.

 8-)


 I usually use a small jeweler's screwdriver 'cause I have it around, but have used an XActo in the past to remove pins from connectors for other reasons in the past. Just needs to have a point or a very short narrow blade to be able to press down on the retainer tab while pulling the pin out.


 I DO recommend using actual electrical tape for isolation of the pulled-out pin - some 'adhesive' tape types have very little insulation value.



 I've not been impressed with smits firmware - have it on one of my S5s, and that machine hashes a good 5% slower than ANY of my others at the same clock. I don't think the cgminer 4.9.0 is optimised right for the S5, as that's the only difference I can find that would account for the difference in hashrate.

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August 09, 2015, 06:21:33 AM
 #59

In the meantime

 Not quite identical to how I did mine, but close enough folks might mistake our miners for being modded by the same person.

 8-)


 I usually use a small jeweler's screwdriver 'cause I have it around, but have used an XActo in the past to remove pins from connectors for other reasons in the past. Just needs to have a point or a very short narrow blade to be able to press down on the retainer tab while pulling the pin out.


 I DO recommend using actual electrical tape for isolation of the pulled-out pin - some 'adhesive' tape types have very little insulation value.



 I've not been impressed with smits firmware - have it on one of my S5s, and that machine hashes a good 5% slower than ANY of my others at the same clock. I don't think the cgminer 4.9.0 is optimised right for the S5, as that's the only difference I can find that would account for the difference in hashrate.


I have SMITS firmware on over 14 S5's and always has worked great. cgminer 490 freq control version.

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August 09, 2015, 09:16:11 AM
 #60

I wasn't aware there is more than one version of the smits firmware. How can you tell which you have?

 Not saying it's not working - just that it mines SLOWER than the Bitmain firmware on my other units that have cgminer 4.8.0 instead of the 4.9.0 on the smits unit

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