الاجابة القصيرة للسؤالين هي "لا", اما السبب فهو يحتاج للقليل من الشرح.

عند فتح قناة دفع مع شخص اخر فعليا ماتقومان بفعله هوا انشاء تحويل بمفاتيح متعددة عددها 2 واحد تملكه انت والاخر يملكه الطرف الاخر وهي تعرف ب Multisig 2-of-2 , في هده المرحلة يكون التحويل عبارة عن 1 بتكوين منك و 0 بتكوين من الشخص الاخر, ولايمكن تحويل اي قيمة منه الا بعد اغلاق القناة.

قمت انت بتحويل 0.5 بتكوين للشخص الاخر, في هده المرحلة تقومان بانشاء بتحويل جديد خارج البلوك تشين يقتضي بارسال 0.5 بتكوين لعنوان خاص بالشخص الاخر و 0.5 بتكوين لعنوان خاص بك انت, ونظرا لان هده ال output تحتاج الى توقيعك مع توقيع الشخص الاخر فسيقوم كلاكم بتوقيع التحويل ويحتفظ كل منكم بنسخة منه بدون ارساله الى البلوك تشين.

عندما يريد احدكم اغلاق القناة يقوم ببساطة بعمل Broadcast للتحويل الاخير الذي ينص على تحويل 0.5 بتكوين لحساب X و 0.5 لحساب Y وبما ان كلاكما وقع عليه سيتم قبوله من النودز والماينرز.

Throughout the "flattening" periods it wasn't all just  small increments, it did consist of little ups and little downs, of course, we will always go up more than down, but the ratio gets squeezed slowly as long as price doesn't go higher, for example

epoch 1 : +3%
epoch 2 : +2%
epoch 3 :  -2%
epoch 4 : +4%
epoch 5 : -3%

so 9% up vs 5% down, so 4% up in 10 weeks, the funny thing about mining probability is that even if the hashrate was dead stable we will still have this small variance due to the nature of luck, so when we see +-1 to -+2% I think it's safe to assume that nothing major in the hashrate happened and it's rather a combination of luck and some short internet/power outages.

Here is the latest update:

It was probably considered off-topic, shit happens, I am sure it's not personal, also you have the right be worried for your money and ask about escrow, however, I have seen ailikun and a few other guys run these kind of shared-rental rounds a lot of times before, most of them ended well and proof of hash rent was provided.

Anyway should there be more demand on using Escrow for these runs, I would suggest you guys get in touch with phill, I am sure he will be willing to escrow the deal.

That's about 17% more efficient which isn't bad at all, I also assume you can get away with 30-40% less fan speed so that will get you another 20-30 watts of the initial consumption plus the fact that it makes the miner quite enough, you might still need a few physical modifications on miner itself, probably make a whole or two like thierry4wd's mod, or change these loud fans to some Delta fans since they make a lot less whining pitch.

How long has this custom firmware been running stable for?

The custom firmware made no difference, it also shows that all three hash boards are dead and showing 0 Asics, with that being a possibility I would most likely still bet against it assuming all three boards "failed" simultaneously, the odds of that happening are pretty slim.

At this point I think a little history about this miner will be handy, most importantly, was this miner hashing fine with all 3 boards with default hashrate of 50-54terahash/s?

If the answer is yes, then I still find it hard to believe that all 3 hash boards went down, if it was hashing at third the hashrate / with one hash board, then chances that that board was toasted as well.

Just so we don't go back and forth on the same thing, since I don't know the answer, if your answer is "yes" to the above question, then here are the possibilities.

1- You got another faulty PSU.
2- You installed the PSU incorrectly, not tightening the screws well enough for forgetting to firmly insert the data/ribbon cables from the control board to the hash boards.
3- Your voltage is out of the 200-240v range.

If your answer is "No", then well, that's just a bad luck, losing a board on these S17 series is nothing out of the ordinary.

I got your pm but all you have to do is mention my username here and LoyceV's bot will notify me.

This isn't the stock firmware, it is Vnish firmware, it looks different and acts different, go the configuration page and check "profile", it will be disabled by default, set it to a low profile, there is no turbo, normal and low, you need to chose a terahash based profile, pick something below 40th and let it tune for an hour or so.

I can't access my PC now, but tomorrow i might be able to access your miner via teamviewer to help you troubleshoot it.

Let us know how tuning for a low profile goes, and be patient it might take 2-3 hours, watch the logs on the same page.

You can upload them in separate parts on different posts, alternatively, you can use something like https://justpaste.it and post the like there and then copy-paste the URL.

Also upload the miner status page, pool settings using one of these websites https://imgbb.com/ or https://imgur.com/ ( you can hide a part of it for privacy).

How do you know that SSH is enabled on the S19 pro? What I heard is that S19 comes with no SSH, not even ssh daemon, which makes sense because it's unlikely that Bitmain will enable SSH again after all these years of disabling it by default while adding more security to prevent replacing the firmware as well as altering the miner's frequency and voltage.

If you are 100% sure that SSH is enabled, I could contact a few people to try and get you the password, please do let me know how did you reach to this conclusion:

سلامات اخي , الحمد لله انك عديت مرحلة الخطر على خير واتمنى لك الشفاء العاجل, انا اثفق مع الاخ خالد فأنا لم الاحظ اي تقصير من حضرتك, اعتقد انه في هده المرحلة يجب ان تركز على صحتك فالمنتدى يمكن ان ينتظر اما صحة الانسان هي اثمن شي.

اسئل الله لك الشفاء التام.

I don't think so, no where in the kernel log where it mentions anything about overheating, it isn't possible because the miner only starts mining after this stage


Whatever happens before is just testing the temp-sensors to see if they are reporting valid readings, the temps in the kernel log imply that the sensor readings aren't accurate and that's due to a bad PSU or dead Asics on certain hashboards, but without seeing the complete kernel log and all the other details we requested, all we can do is speculate.

As far as I know, CZ didn't ask for blockchain rollback after the hack/s, he talked about how is it possible and what are the pros and cons, and he mentioned "we decided NOT to pursue the re-org approach." Source: https://twitter.com/cz_binance/status/1125996194734399488


The mining wallets are separated from the exchange wallets, your mining rewards aren't tradable until you move them to your spot/future wallets, also given the fact that this is a PPS pool, it simply means the liquidity is already at their disposal, whatever they mine will go to the miner after deducting the 2.5% fees, in some cases they will be paying more than the mine, so all in all, I think this has nothing to do with market rates.

Having said that, the reason why I decided to give Binance pool a go is because I was looking for an alternative to Viabtc, while Viabtc is without a doubt one of the best PPS pools out there, the fact that it's controlled by Bitmain makes me not want to mine there, F2pool surprisingly restrict certain countries from mining, this is th reason why I would love to have a non-China based large PPS pool which sadly doesn't exist.

I need to see the following:

1- Miner status page (screenshot), use this website https://imgur.com/ to upload the image.
2- I need to see a complete kernel log, use the code function as explained by favebook.
3- Readings of the AC voltage.

With the above information, I might be able to help you troubleshoot the miner.

You need to replace the PSU, there isn't much of work arounds you can do fix this, your best option would be running a singel hash boards at pretty low settings until the new psu arrives, although if i were you i would shut it down and wait for the new psu to make sure i don't harm more things.

One thing worth mentioning that lower/higher voltage than what bitmain specifies will kill the new psu as well, make sure your voltage is between 200-240v.

فكرة جيدة ولكنها لن تنجح، بغض النظر عن التكلفة الاولية فأن توليد الكهرباء عبر الطاقة الحركية البشرية غير مجدي.

مثلا عند استعمال الة الدراجة الهوائية او التردميل للركض ستجد انه في حال الجري بسرعة متوسطة فكل ساعة تخبرك الالة انك قمت بحرق حوالي 500 سعرة حرارية هدا يعني 500 وات.. للاسف هده الطاقة المهدورة حوالي 75% تستعمل لجسدك وفقط 25% يدهب لالة التمرين يعني حوالي 125 وات كل ساعة.

بطارية 150 امبير تشتغل ب 12 فولت تقوم بتوليد 1800 وات يعني انت تحتاج للركض لمدة 14 ساعة لتشحن البطارية.

طبعا نحن تجاهلنا الفاقد في الطاقة لتبسيط الحسابات ..وعلى العموم 1800وات كفيلة بتشغيل جهاز antminer s9 دخل الجهاز حوالي دولار ونصف يوميا.

الامر قد يكون مجدي في المستقبل عندها يقل سعر البطاريات وتزيد كفائتها ويصبح توليد الطاقة الكهربائية من الطاقة الحركية ارخص واكثر كفاءة.

It's great that you started a different topic so that we can stop pumping that one.

Although I feel that the main point of discussion has shifted a bit here, I should make clear that I don't think other pools provide more details to their clients than Kano, I simply imply that those pools PROBABLY do have and collect all the data Kano collects.


This is my point exactly, a pool has 15% or 20% of the total hashrate, pays in PPS and has survived for years does have all the reasons in the world to monitor every share submitted to them, in fact, they have more incentives to do that than Kano or any other PPLNS mining pools.

From a financial standpoint, if 20% of the hashrate is programmed to not find shares here is the outcome:

PPLNS pools:

Users lose 20% - 20% of mining fees, so if they pay 1% in fees they will lose 19.75% while the pool only loses 20% of its fees which is 0.25%

FPPS pools:

Users lose nothing, Pool loses everything ( expect if the block fees are paid in PPLNS then the users will encounter a small loss which is 20% block fees - 20% of the pool block fees)

I can't possibly imagine that a small FPPS pool like sigmapool with just about 850PH will survive all these years if they had just about 30PH of no-block-finding hashrate, they would survive for a week or two, maybe a month but paying 4% more than they could "potentially" make would have sent them to bankruptcy a long time ago, unless the remaining 820PH always have 4% more luck which is very unlikely.

Looking at large pools like F2pool, antpool, or all the other large PPS pools, they would have been losing MILLIONS of dollars on a daily bases if they allowed blockless hashrate to mine to their pool.

I agree that "Absence of evidence is not evidence of absence" but I can't believe that every other pool except Kano has been losing money to block-less hashrate knowing they don't even need a professional dev to figure that out after all these years, all they need is an accountant with mediocre skills.

Assuming F2pool paid 10,000 BTC throughout 1 year and found out they have only mined 9,000 BTC they would have closed down or hired professionals (assuming they don't have any which is also unlikely) and they would have figured out that say 10% of the hashrate they have been paying for is blockless.

But none of that happened, no pool blocks rentals or custom firmware expect for Kano, I need to see a real unicorn first for me to believe that Kano is smarter than the rest of the world combined and that every pool except for his runs at loss.

Now as far as stats that the user gets to see, and since you are " spoiled when it comes to stats" I suggest you stick to Kano   because I am sure most pools don't provide as many details, you usually get the average data of:


Online for/since
Offline for/since
Current hashrate
1H hashrate
24 hashrate
Accepted %
Rejected %
Hashrate Chart per worker and subaccount


I have yet to see a large pool that will show you the number of shares, the largest share, diff, and all the other that shows in the image above.

Honestly, I would love to get all these data, but it isn't a big deal, as long as I get to see my hashrate and the acceptance rate, that's good enough, I wouldn't mind the extra details but I certainly wouldn't leave a mining pool just because it doesn't provide that.

So I decided to give Binance pool a shot and see how they do, and the experience wasn't the best I had.

First of all the user interface is quite annoying with little statistics, no monitoring application and overall nothing but basic features, but wasn't a much of a problem, until I suddenly noticed some weird stuff going on, the first time it happened a few days ago, total hashrate on the pool dropped about 30% on two different subaccounts, I checked the miners that were showing 0 hashrate on the pool they were mining just fine with shares getting accepted on Binance pool.

I contacted their support through live-chat and then while they were collecting information from me, I refreshed the page and everything was back to normal, a sudden increase from about 350th to 500th on one account and 250th to 350th on another.

The support told me "nobody reported such an incident" so indirectly suggesting that it's a problem on my side and provided me with the "technical team" email for further support, of course, I was lazy to go through all the trouble and just ignored it.

Mind you that the two accounts use different miners that are located in different geographical locations, with both farms having other gears mining to different pools and at the time of the hashrate drop on Binance pool every other miner on every other pool was hashing normally without a problem.

The strange thing is that they weren't showing offline/inactive, they were active at 0th.

Last night, as usual, I was checking the hashrate on the pool and damn the same thing happened again, I quickly went to check if all miners on other pools were reporting proper hashrate, and everything was perfect, check the miners that were reporting active with 0 hashrate on Binance and they were submitting shares to Binance pool without an issue.

The funny thing is that when that happened, even the 24h hashrate would drop to 0 and the rapidly climb back up to it's the normal hashrate.

I am not suggesting that Binance planned to steal my small hashrate and mine with it for an hour or so, I just think something is wrong with their pool, I am also not totally negating the fact that somehow "magically" only certain gears that are pointed to Binance pool were having an issue and the status on the webpage and aweomseminer was wrong, but I'd give that a 0.0001% chance.

The pool does have some good features like a watch-link where you get a URL to monitor your hashrate without having to log-in, you can also directly transfer funds from your Pool wallet to Spot/Future wallets to trade it for other coins or stack it or do many of the things you can do on Binance exchange, but the disadvantages overweight the advantages of this pool and It was a short-lived experience which I will probably never have with them again.

Without a doubt, the amount of air you need to force into the farm doesn't have to be equivalent, remember that the miners themselves are pulling air inside assuming the cold side of the farm isn't 100% sealed, but this doesn't mean you can get away with a few holes in the cold side wall, you need intake fans.

We do 9 in and 10 out,  so 80,000m3/h for exhaust and 72,000 m3/h for intake, I believe you could do 1:1 ratio assuming you have vents on the hot side of the farm but not in the cold side.

I believe the middle underscore _ means the wall/separator whereby the miner will go through it, just like the average set-up most of us use to isolate the miner's intake from the heat.


He sure does, with only 5 meters in width there isn't enough room for the heat to sit in before crossing back to the cold section, and thus the exhaust will need a lot of work, I would use only shutters and fans and no walls.

The hot air wall would look something like

shutters - fan - shutters - fan - shutters - fan - shutters  - fan
fan - shutters  - fan - shutters - fan - shutters  - fan -shutters

This will result in a very good air extraction and if you haven't build the wall yet, it might even cost you less, all you need is galvanized steel pole tied vertically and horizontally creating squares/rectangles to hold the fans and the vents/shutters.

I am sure it can't be 9 meters high, so it's 9m for width, 5m for long and 4.5m for height, Kuwait has an extremely hot climate, above 40c/104f is pretty average around noon, that is a ton of heat he needs to get rid off.

I would stay away from evaporative cooling because the humidity it generates is more harmful than the heat on those miners, I can't give you a detailed advice, but for a 300kva/240kw worth of mining gears we currently have 19 8000m3/h aka 4708cfm fans, 10 for exhaust and 9 for intake, they are moving a ton of air and the miners are doing just fine even in extremely hot days, all gears are set to manual fixed speed of 100% (5000-6000rpms), and of course, no overclocking, in fact a few them are underclocked during the summer.

You could use that as a reference, but none of the above was based on scientific facts, it was simply trial and error which eventually worked fine.

That's a great point, as far as I know, germanium costs way more than Silicon, way harder to keep cold and but can achieve much higher frequency, but the fact that in most applications Silicon is the preferred semiconductor shows that up to now and perhaps in the near future there is no changing in that.


If 50k is going to be the end of it, then current gears can take care of that, perhaps another more 2-3 generations and then we hit the maximum, also I believe that the higher bitcoin price goes the less incentives to make more efficient gears, if BTC hit 100k even old S1s become profitable again, and once the profit margin is so huge, efficiency matters less.

in other words say antminer S25 does 200TH at 3000W, at 5 cents per kWh you will be paying $3.6 a day when 200TH make $20 a day, what reasons would you have to buy S27 that does 200TH at 2800W? 2.8kw is $3.36 a day that's 24 cents difference, by the time we get to S25, getting those 200w will cost way too much to be justifiable.

Should the price go down or remain constant, we will see mining manufacturers push to squeeze the last bit of their 7nm and 5nm.