Thanks for explaining my point  you saved me time.

depending on which part of the forum you frequently watch and participate in, you may be right.

if you are hanging around the alt board reading about new shitcoin ICO every 5 seconds where you get a dozen of people shilling it then yes it is indeed a fucked up situation, and this is where most newbies go to , because everyone wants a Lambo next year .

so honestly when you stick your head in the toilet you do not expect to smell lavender, unless something is wrong with your brain.

now if you come to meta to enjoy seeing new improvements or people fighting over the silliest things , sitting there scrolling through the posts while on the sofa with a large bowl of popcorn is free-fun. or maybe I am mental !

all the shit aside, if you go to the technical serious boards such as Mining or development & technical Discussion , you will be surprised that even the newbies there could be far more informative and knowledgeable than many high rank members on the alt section.

This looks like a pool or connection/network problem , i am 99% sure.

based on the fact that you can only get 1 working miner at the time, then I am willing to bet the horse that this is a network problem.
i guess if you turn of the currently working miner, turn on the original miner, it will work.

this could be the cause of these 2 following:

1- you are using a static IP which is similar on all ASICs, so once you restart the router, the router works based on first come first serve, whoever make the hand shake, get's the IP , the other one sit there and cry all night.

2-your DHCP client has a limited IPs to give, maybe you have other devices along with the single working miner that is fully utilizing all the IPs on your dhcp table.

*so if you do turn the working miner off, then turn your router off and on again, wait 2 mins, turn the original one on and it works. then we know your problem is router related, and i will tell you how to fix it in.

if my theory is wrong , then try this

try these in order, 1 at the time , reboot after every trial and you need to allow 10 mins at least after each reboot

1-copy paste the pool info from the working T9, make sure you copy it exactly , confirm you have no trailing spaces

2-change the network setting on the miner, if it's DHCP , give it a static IP address, copy the DNS and other info from the working T9, everything must be kept the same except for the last part of the IP needs to be something different, for example if the working IP is showing
192.168.1.40
the ip on the non working miner should be 192.168.1.45 or 192.168.1.30 or 192.168.1.67

3- back up the firmware from the working miner,put it in the non working miner, if it has static IP, make sure you turn off the working miner , then restart the non working miner

report back , if i take too long to respond , feed free to shot me a pm.

 
  I mean the SHA256 ASICs in general develp slower and less efficiently than other algorithms.

 if we make a small compassion between SHA256 and X11 Asics made by Bitmain we get this.

X11

 D3 (Aug 2017) 19gh  1350w

 D5 (recently)     120Gh 1566w
----------------

SHA256

S9 (May 2016) 14th 1370w

S15(recently )28th 1595w

----------------

I know that these are measured in different units TH and GH but this is not my point.

the point is even though the D3 was released at longer period after the S9, the performance of the D5 is by factor of 6.3 while the S15 is has only a factor of 2 compared to the S9 (took power consumption out because they are almost exactly the same).


what is the possible technical explanation behind this? why did it take bitmain this long " assuming they release everything the moment the make it" to only have double the hashrate when they had the power of 6 d3s put in 1 D5.

I do not seem to grasp the technical part behind this , as Algorithm based ,we know the X11 is more complicated as it used 11 different hash functions and is based on SHA-3 which is supreme to the SHA-2 that SHA256 uses.

also in general, does this slow improvement indicate that we are getting closer and closer to the limit of transistor technology? are we close enough to fully utilize 7nm and then sit there for couple years without any major improvements in the ASIC mining industry?

 The default font size which is 10pt is very tiny and hard to read for Arabic letters. the default size should be 12pt.

* i know we can change the font size, but doing so in every post is a waste of time and effort for something that is very basic.

Thanks.

you can have 1.6 billion worth of bitcoin without your wife knowing about it, but you buy 10 bars of gold and everyone and their cats knows about it.

a large part of security is anonymity, which Gold lacks.

if i remember correctly you have quite a large space,  15 feet is more than enough, depending on the width you going with.

if you want to have a decent spacing like mine, then all you need is 11.5 feet of height, which is about 3.5 meters ( same as mine)

with this height you can have 5 rows and the space from the highest miner to the roof will be about 5 feet which is good enough.

here is the initial design
 


of course having a higher ceiling is better if you do not plan to exhaust air through the ceiling  , because if you do, then what matters more is the space from the mining room ceiling to the main room ceiling, if you planing to suck the air out from one of the sides, then the higher the ceiling the better, but i still think 5 feet from the top miner to the roof top is more than enough.

also with 30000cfm i am sure the hot room will not be too hot   , but you will need to have a large intake fan in the cold room, facing the opposite direction of your exhaust fan , because the air pressure created by the 30000 cfm along with  miner exhaust fans will be too much for the miner intake fans to handle, they will be spinning at high rpms and the pressure in the cold room will be so low, like latterly you will not be able shut the door of the cold room if it opens to the inside, it will feel like a very strong person pulling it from the inside, therefore you need to force at least something close to 30000cfm to the cold room, which does not have to be a single fan, maybe 10000cfm fan and make a few holes on the side of the wall of the cold room for air to come in easily.

a single 600mm2 exhaust fan which i think is about 70cmm or 2000cfm

i have to guess because it is a second hand with no label what so ever   and it is doing the job just fine, also when it get's very hot and i have to increase the fans rpm( of the miners) i simply open the door of the hot room to allow some of the hot air to go outside, the intake for the cold room is on the opposite side so the hot air has noway of going back.

i know many people say that you need at least 150-200 cfm for each miner which means i will need about 200*40 =8000 cfm but really for this set up a single fan is doing the job, in fact it stopped working once so i had to rely on only the pressure of the miners' fans to push the hot air out of the door and temps were not even that high, i think as long as the hot room is large enough then there is plenty of room for the hot air to find it's way out. i know this might not make sense if you would go by the BOOK , but it's working for me



I will take more pictures when i set up the coming miners to give  you a better overall view.

I think you misunderstood the cause of whatever problem you seem to have which i do not clearly understand. but one thing for sure, the bounty managers can only stop you from participating in their campaign if they track your posts and conclude that you are doing it with multiple accounts or joining more than one campaign at the time , there are many ways and reasons but IP restriction is not one of them. there is no way that anybody except for the mods ( maybe not even all of them) to know your IP just from posting.

agreed , but you realize that someone has to sell for someone else to buy ? why do you think the rich get richer and whales get bigger while average joe enters the market and end up broke ? because they wait too long to buy and when they do, price starts to crash, and again they make the same mistake by waiting so long and then sell and over sold market at the very wrong time.

one does not really need to be a pro trader to understand that buying at 3k or 4k for the long term is a golden chance given the risk/reward ratio. but to someone who day trade, and ready to change their mind as the market does, it is okay to sell at any point because you will buy again soon. but for a hodler or a very long term trader, you can't sell the market after 85% crash, it is just stupid.

 ok , so i think what the OP is trying to say is that , there was an announcement about a prize of extra postcoins for those who guess the right number of something !  on > bitalk.org  ( a Russian website i think) which he had to announce to the members of bitcointalk.org

so he thinks it was a generous act of him to let the people on this forum know about whatever prize was given.

* i used google translator , so i hope someone who speaks Russian can confirm if i understood him right.

if YES , then i do not think this counts as plagiarism, because in many languages including mine, we do not reference a quoted text the same way in English, and by default since the text source is clear then it is not an attempt of plagiarism.

for example if i saw a tweet on Megan fox twitter saying  " Megan will marry trump because he is hot"

if i had to announce that to somebody else i would say the following:

Megan will marry trump because he is hot. without quotations as long as the source is there and it reference the original person.

and since we know i am not Megan fox, and still copied and pasted her text, it is not plagiarism. but if i said I am going to marry trump because he is hot, then it's plagiarism.

so if the Russian speakers on this forum know that the OP is not the postcoin official speaker nor he claimed to be , then this is certainly not a plagiarism.

I doubt that those who only speak English will understand "exactly" what i am trying to point out , but i am sure those whose English is their second language will understand.

tho i still find it strange that someone who has been around this long can't speak proper English ( i know he is not obligated to ) but it is just strange.

The front



The back



I have now about 30 Asics in this room, still have room for a few more that i am getting in a few days.

I used MDF 16mm to divide the room into 2 smaller rooms , used a CNC router machine and trilled squares of 121 square mm, so i could easily insert the fans, then dealt with the 1mm with tapes to try and perfectly isolate the the intake from the exhaust.

difficulties i faced:

1- the alignment of the rack , as i used cheap racks to save cost, and they are not very flat, neither was the floor, i knew this from the start so i had my initial design on the CNC to keep a margin to the downside, as i can lift the miner up by putting anything under it but cant force it down ! , so it made more sense to do it this way, that's why you can see some miners sitting on a small peice of wood " the left-overs from the mdf sheets i used".

2- the initial work on the CNC machine, it took me sometimes to perfectly align everything all together, the metal poll in the middle "visible on the second picture"  was taken into consideration while drawing the design which made it less efficient, but still worked. the pole was important as the size of the mdf sheets i had access too were either not large enough to cover the whole space or too large to sit on the cnc table, therefore i had to cut it two 4 pieces and used the pole to hold it.

advantages of the current set up over the previous ( before the split)

1- the miners run cooler as most of the hot air has no way to go back to the intake
2- way less noise
3- potential of better and easier use of the hot air in the hot room ( maybe put a few egg incubators in it and they will crack in hours   )
4- in the summer it gets extremely hot here, up to 45 degrees c  is normal  >: , oh that is (113F for fellow Americans   ) ,,so no matter how much airflow is put, they will still get hot, so i have to use an AC to let the miners inhale   some cold air or they would melt. this was not possible in an open room as i would need a dozen of ACs to beat the hot air,but now i only have to beat the ambient temp which is enough by using a single 24000 btu AC

so you can actually use anything to isolate, whatever is cheap and at your disposal.

* I have very cheap power rate so i could care less about an AC running 24/7 in the summer, and the ACs here are designed to do so.
* i know the spacing is too much, but i had a lot of room with FIXED power, so 40 miners will be it for this farm, an upgrade is NOT possible  

i did all the wiring myself, including the electricity, if you have any question regarding that , feel free to ask.

cheers.

---

Farm no.2

So here comes the second farm, actually it's the first but i haven't had the chance to share it with you guys, so i had to manually reset one of the miners today and decided to take a few photos and share my humble set up.

The set up is pretty similar to the other farm > https://bitcointalk.org/index.php?topic=5087770.0

but this one is a a lot smaller.

so here is the view from the outside



i used gypsum board to build this small farm, don't ask why , i always use the cheapest martial i have at my disposal  

same split set up. hot room to the left, cold room on the right ,notice that i don't have an easy to open door for the hot room since i don't need to in there often.



here is a view for the racks

3 rows, each row takes 4 miners, there is currently only 8, i sold the other 4 for a good price, bought another 4*s9s should be here in a week or so.



here is the 2 intake fans, they are not industrial , just the once you would use in a kitchen, and they are doing pretty good, i have 3 of them attached to the roof to exhaust the hot air from the hot room, sorry i forgot take a picture  of those, but they are the same exact once.



and here is the main and sub circuit breakers



so the main cable that runs to the main breaker is 16mm2 (5awg) , the main circuit breaker is 80 amps at 220v it should handle 17600w, but i am only consuming something below 15000w.



I have 4 MCB of 25amp each , 1 is for the AC , and every 4 miners are connected to 1*25 MCB ( 3*4 = 12 miners).
the 16amp MCB  is used for the switch and the fans.

you can see in the image, there are 2 wires  going out of each MCB, every wire is used by 2 miners, the wire is 6mm (9awg).

so every wire goes to 2 plug sockets as shown in the image below



i use those sockets only to cover the wires, i am not a big fan of using plug sockets for over 1kw , i cut the end of the psu cable, and joint it directly to the cable using the same blue joint kit that you can see in the image of the circuit breakers, the initial set up was using those outlets but then i realized that it was a bit risky as those sockets were not very good quality.

some people  think it's not the best practice, but i don't always good by books, i prefer real life experience and practice, and jointing the miners that way has always worked well for me, i had bad luck with using outlets/sockets, but not a single problem using these joint kits , plus i get to save some money with this set up.

also notice that wiring + breakers set up might not be something that people who go by the book agree with, but this has been going well for over a year and not single problem.

the total cost for building this was about 400-500$ from scratch to end including just about everything except for the miners of course.

edit: the place is quite dusty, am planning to clean it this weekend  

The "sensible" solution for plagiarism would be this.

a button on every post labeled with" Click me NOW" , takes you to another page where you need to quote the original text, the two texts along with the timestamp run in simple query that checks the integrity of the report by matching the two texts, if it matches , BINGO ! that account gets INSTANT BAN for a limited period of time which equals to his lifetime.

and yes , the button should be available to everybody including newbies so that they can ban higher rank members who copy and paste.

I can tell you this is going to be a 100% plagiarism free forum, as everybody will be watching over everybody else.

and this to me is the ONLY "Sensible" punishment for somebody who steals the words of others and present them as their own.

 I have not read the comments, not sure if anyone pointed this out, but the truth is . if quantum computers are going to be a threat to anything then the last of anybody's concern would be bitcoin. the whole world will be at stake, starting from banks to secret intelligence   but really QC is not as scary as it seems.

as far as bitcoin goes, i do not see that MUCH of a threat coming form QC.

1- For the mining part,  indeed QC based miner could out perform a non-QC miner but i am willing to bet the horse that the cost will be very high , by the time the production of a proper QC based miner which can beat a non-qc miner , all BTCs would have been mined and we all are going to be dead anyway. and regardless of my theory , there is no way that QC miners will mine all the remaining BTC in no time as many people think (thanks to the difficulty)

2-The strength of QC relies on the ability of cracking a private key from a public key, the great security measure in BTC is that the public key goes through 2 hash functions (RIPEMD-160 and Sha256 ) which are not very vulnerable to QC[1]. of course this means you will need to use a new address for every transaction as your public key would be revealed after using it which could be inconvenient but this threat excist as of today that's why most people use automatic key exchange.

[1] QC or even existing computing can break both hash functions, but if you have the computing power to do so then it would be more profitable for you to mine bitcoin and be ahead of everyone else.

also by the time this treat comes, we would have had more security measures.

so no bitcoin can't die because of qc, it can die for other reasons tho

This is strange, i did a little research for you and found this > https://bitcointalk.org/index.php?topic=2899438.0

while appeantly you don't seem to have the wrong firmware but it could still possibly be a firmware issue. so try to flash another firmware also make sure it is the correct firmware. be aware that T9 and T9+ firmware are different.

very wrong bro, do you want to bet that btc difficulty will not go side ways for the rest of the year?

my bet is (btc difficulty will remain flat as hell with no change at all for the rest of the year) 

yes I agree with you, 100% , my chart is pure bullshit drawing based on nothing but wishful thinking, so can you post a picture of the crystal ball that told you the bear market is not completely over?

I have no problem with having a healthy discussion based on TA as this is a TA thread where random thoughts and prediction are OFF-TOPIC.

you can't sell btc at 3k and then troll everyone who says btc is going up  , if you have a chart , post away. if not then put me on ignore list and move on with your life.

thanks

when i saw this yesterday, i was like "what is phil smoking ?  " thinking price will follow diff. ! but guess what, we are so close to 4.5k . i will be adding this strategy to my TA if we do hit 4.5k.

what do you mean by stopped? is it not hashing ? is it showing 0 hashrate? can the status page load ? did this happen after a firmware upgrade? please put more details so we can help you.


also a Reset solves many problems most of the time, so try that first and let us know.

First of all , i do not see a reason to find an alterntavie firmware for L3 , i personally think the original one performs just great.

lastly and most importantly is that you need to release that most of these custom firmware come with devfees, some are announced and many are hidden.

I have no tried any different L3 firmware, but i am pretty sure there is not much of addition that can be done on L3 anymore, plus the profit in the L3 now is very low and it can't take any devfee.

if you have a certain problem with the current firmware please post it and i will be happy to help you out.

cheers.