Recently I ordered some spare parts from Bitmain, and they still haven't shipped. Odd since they are usually consistent and quick to ship (for spare parts at least).

I checked on their website and it seems like every single product is out of stock, including EVERYTHING on https://shop.bitmain.com/product/parts !!

Do you guys think bitmain is going bankrupt? I submitted a ticket but I'm afraid they might just keep my money even if they've stopped shipping orders.

This is all I could find online: https://news.bitcoin.com/leadership-feud-at-bitmain-10000-antminers-go-missing-in-inner-mongolia/

[Here's what happened:]

Unfortunately, it is time to go public with my scam alert for JH Group, Inc. (aka JH Cryptofarm) headquartered in Corona, CA, with various mining facilities within USA and potentially Canada as well (?)

Here's what happened:

In July 2019, I was hired by JH Group to develop and deploy a custom operating system for mining Ethereum onto 183 of their GPU rigs. This included testing each GPU as well. The project was completed successfully on August 7, with a spreadsheet of the final results sent to all of the necessary people. I also left them a couple USB drives with all of the files necessary to upgrade the rigs in the future, or to install the software on new rigs.

My primary point of contact for the project (whose name I won't mention as he is no longer with JH) was very happy with the results and assured me several times that payment had been approved and would soon be sent. However, around 1-2 months ago, he called and told me that he was no longer working at JH Group. I followed up with others from the company who I had interacted with in the past (ceo, cmo, director) and I've been absolutely shunned by everyone, not a single reply or any contact from anyone.

I did not require payment up front on this project, as I'd worked with this company in the past and was willing to receive payment afterwards. However, it's become clear that these people are willing to be very dishonorable in their business dealings. I'm disappointed with their behavior and thus I'd like to strongly advise anyone who is considering doing business with JH Group to forget about it, you can always ask me for more specifics details about this if you need.

Also, I would appreciate your thoughts or questions regarding this. I don't really have the time and money necessary to fly to California or Oregon for any type of small claims court, as I'm living in Virginia currently.

Here's the details: (no private info included)

Amount scammed: The amount that I am owed according to contract is $2500 usd, and they also promised to reimburse shipping for one of the GPU rigs ($30), so that brings the total amount that I lost to $2530.

Company headquarters:

JH Group Inc
809 E Parkridge Ave, Ste 101
Corona, CA 92879

Oregon mining branch HQ and facility location:

62885 NE Mercury Place
Bend, OR

Website: https://www.jhgroupinc.com/ (alternative name JHCF Cryptofarm)

Employees involved:
CEO: Emil Hakim
CMO: Sameh Radwan
Director: Jonathan Mendez

Reference email / contract: (before) https://i.stack.imgur.com/EByYf.png
Reference paste showing some selected data from the results excel file: https://pastebin.com/4bCUkA0Q
Reference paste showing part of one of the shell scripts: https://pastebin.com/5JQ3ymyB

I'm looking to buy S9 hydro control boards. I'll pay $60 for new or like new boards, otherwise $40 for any working S9 hydro boards. Should look like this:

https://www.eastshore.xyz/wp-content/uploads/2019/03/Evaluation-on-Antminer-S9-Hydro-Water-Cooling-Bitcoin-Miner-IMG-07.jpg

I don't mind paying up front if you have a good reputation here, otherwise I'll require you to send first or arrange for escrow. Reply to thread and/or PM with any offers. Thanks!

Hello all,

I booted up an S17 / T17 control board that I bought through bitmain from https://shop.bitmain.com/product/parts

On the main page when I log in with root/root I see "MP TEST FIRMWARE!" in big red letters. Take a look:

https://i.stack.imgur.com/hIw3Z.png (p.s. the "Locate" subtab from newer firmwares is missing here)
https://i.stack.imgur.com/V3R9A.png
https://i.stack.imgur.com/9Eix9.png

Then when I click on the "Network" tab, an additional "Quality" tab appears (of course, the board is not attached to any fans or hashboards):

https://i.stack.imgur.com/jcTzl.png

Here is pastebin with kernel log:

https://pastebin.com/18mLGNJA

It doesn't really matter to me since I had to overwrite by upgrading to the latest T17 firmware anyway, but I was curious about what this MP TEST FIRMWARE might be or if anyone has seen it before. Looks like the compile time is in HKT timezone rather than CST; I haven't seen that before. Thoughts?

Disclaimer : 2019 firmware versions disable SSH access.

So during my journey to automate configuration of miners using set_miner_conf.cgi rather than SSH, I found that the drop-down efficiency menu on the configuration page has some numerical values which you need to know in order to construct the data from scratch:

Code:

1   : Normal
228 : HashRate+2.0TH/S
227 : HashRate+1.5TH/S
226 : HashRate+1.0TH/S
225 : HashRate+0.5TH/S
250 : HashRate Unchanged-Lower Voltage
241 : HashRate-0.5TH/S
242 : HashRate-1.0TH/S
243 : HashRate-1.5TH/S
244 : HashRate-2.0TH/S
245 : HashRate-2.5TH/S
246 : HashRate-3.0TH/S
240 : Low Power Enhanced Mode

So the data string to set to enhanced LPM (on default pools) would look something like this (*colons should be encoded as %3A* notice the 240 at the end):

Code:

_ant_pool1url=stratum.antpool.com:3333&_ant_pool1user=antminer_1&_ant_pool1pw=123&_ant_pool2url=stratum.antpool.com:443&_ant_pool2user=antminer_1&_ant_pool2pw=123&_ant_pool3url=stratum.antpool.com:25&_ant_pool3user=antminer_1&_ant_pool3pw=123&_ant_nobeeper=false&_ant_notempoverctrl=false&_ant_fan_customize_switch=false&_ant_fan_customize_value=&_ant_freq=&_ant_asic_boost=false&_ant_low_vol_freq=false&_ant_economic_mode=false&_ant_multi_level=240

For example, in bash I can put this data into the $data variable, and send it to set_miner_conf.cgi like so (with $1 = ip and $2 = web password):

Code:

 curl --anyauth --user root:$2 -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST -d "$data" "http://$1/cgi-bin/set_miner_conf.cgi"

Lastly, sometimes you may only want to change the efficiency mode without altering the pools. No need to hardcode the pools, you can get them from the miner even when API is down. By using mapfile, you will preserve empty fields, such as blank passwords or no third pool:

Code:

$ mapfile -t pools < <(curl -s --anyauth --user root:$2 $1/cgi-bin/minerConfiguration.cgi | grep -e '"url' -e '"user' -e '"pass' | cut -d ":" -f2- | cut -d '"' -f2)
$ printf '%s\n' "${pools[@]}"

stratum.antpool.com:3333
antminer_1
123
stratum.antpool.com:443
antminer_1
123
stratum.antpool.com:25
antminer_1
123

Hi everyone! Recently I've joined with some friends who are looking to source miners for a new facility in the Eugene, Oregon area (USA). The facility will hopefully be able to support up to 2 MW of equipment.

We are looking for 200-300 of Antminer T17 or similar models. Bitmain is fully sold out of btc miners right now, and I figured that this is the best place to ask around.

I'm looking for any opportunities or ideas you guys have about how we might be able to get our hands on a decent quantity of Bitmain's newer miners (S17, T17, S15, etc.). Or, perhaps we should take the plunge and get some M20S?

Please tell me your opinions on this. I have plenty of technical skill to manage the miners but little experience sourcing miners of my own..

Hi all,

I'm currently looking for a few T9+/B3/E3 control boards. I don't care if they are used, as long as they have a serial sticker and are fully working.

I'm willing to trade some new S9 xilinx boards (no signature lock, so any firmware can be installed). These are factory seconds so they are new & work great but might have tiny cosmetic defects.

Again, anyone with old T9+/B3/E3 controllers, please let me know, as I need a few.

Hi everyone! I have 17 used APW3++ PSUs for sale. They work great (just taken off of working S9s) but definitely look used (see pics below).

https://i.imgur.com/wSRlvJM.jpg
https://i.imgur.com/xDuHo03.jpg

I am asking for 0.02 btc per PSU, with an additional 5% off for each additional PSU bought. So the total price for N psus would be (N*0.02)*(1.025-N*.025) btc

Your payment covers shipment within the USA, but if you want me to ship international you will have to cover that extra shipping cost. Escrow with trusted forum members is fine but fees are on you.

Take a look at this picture of an S9. It looks like there is some type of corrosion occurring around the ethernet port. Any thoughts on what might have caused that?

https://i.imgur.com/S1MdC99.jpg

Hello all,

I'm looking to buy Taco Bell gift cards for 70% of face value.

Payment in btc once I activate the cards

Depending on your power costs / cooling situation, it might make sense to have your Antminer S9s running on LPM some days (regular hashrate, 88% energy usage) and on Enhanced LPM on other days (70% hashrate, 53% energy usage). This will reduce heat output and cooling costs when necessary.

If you only have a few miners, you can simply uncheck the "Enhanced Low Power Mode" checkbox in the configuration page when needed.

If you have a lot of miners, you can actually automate this process through SSH. All you have to do is add this line into the config:

Code:

"bitmain-close-low-vol-freq" : true,

There are many tools that allow you to remotely execute commands over SSH. I found the sshpass utility to be the easiest, but you could probably use pssh or ansible as well.

What do you all think?

Hello all,

I've come across a widespread issue in a farm today that I could use your help with.

It started when I received notice that a large number of miners (all of them Antminer S9 base model - mostly 13.5th) appeared to be hashing fine when looking at web miner status or miner API, but on the pool API it showed no hashrate for these miners (no shares being submitted). When I look at these miners through either the status page or API, they appear to be hashing, but all of the stats are frozen. For example, the "elapsed" time does not increase, realtime hashrate does not change, nothing. Kernel log does not change and no error messages are present.

The eerie thing is that LSTime (last share time) still increases as normal. And it also looks like fan_num is always 0, and all fan speeds are zero.

When I reboot the miners, everything comes back up normally. Stats stay updated, fan speeds show up, shares get submitted (confirmed by pool). So what I am planning to do is make a script that checks all of the APIs so that e.g. if hashrate > 1th but last share time > 10min then reboot the miner.

The thing is that I have no clue why this is happening, and what might cause it to reoccur. Any thoughts?

Hello everyone,

So I found a Bitcoin mining pool called sigmapool.com recently. I am not affiliated with this pool at all, and I was surprised that no one had posted about this pool in the Pools section yet.

I made a topic for this pool in the pools section, but when I came back today the topic had mysteriously vanished. No message to me about it being deleted, nothing.

The only other post that used to exist about this pool was in the Russian section here - https://bitcointalk.org/index.php?topic=5056302.0 - but it seems to be gone too.

Is there something I don't know about this pool? Why would all of the posts about it be deleted?

Please let me know what is going on.

[SigmaPool]

SigmaPool is a BTC / LTC / DASH multipool that is currently offering both PPS and PPLNS payout schemes with 0% fee.

The pool's hashrate is around 180 PH/s, and the PPLNS payouts are based on a 2Nd ramp time.

Registration

After registering a username on the pool (e-mail verification required, 2FA is optional but recommended), you can configure your ASICs like so:

Pool: stratum+tcp://eu1.btc.sigmapool.com:3333
User: username.workername
Pass: x

Username is not case sensitive. Worker name is optional and can't contain any symbols besides the underscore.

Rewards

Detailed miner stats and rewards projections are displayed on your personal dashboard. You can also see past rewards and export as CSV from the Earnings tab.

You can optionally receive alerts by e-mail whenever a miner goes offline.

Minimum threshold for withdrawal is 0.001 BTC. No withdrawal fee.

Has anyone had any experience with the "Optiminer" optimization software for the Antminer S9 / T9 series? This is different from the Optiminer Zcash/Equihash GPU miner.

I wasn't able to find much information about the software online, except that it is produced by LSJ, LLC. I think it's supposed to make the miners more power efficient.

Any thoughts?

[Current stock:]

Current stock: (ships next day)

2x Antminer S9 / S9i / S9j control boards

1x Antminer D3 / L3 / A3 / X3 control board

I also have some T9+ boards but they would be more expensive.

All control boards are tested and fully functional.


Pricing:

0.01 Bitcoin per control board. This includes 3-4 ribbon cables with each control board, as appropriate.


Shipping details:

FREE shipping within USA

US~$10 shipping within Canada

US$15-30 to most other countries

Everything is well packaged and shipped first class.


How to order:

Send a PM to order. Newbies welcome. Escrow is available but fees are on you. Feel free to ask questions here in the thread as well.

I accept BTC, ETH, LTC, ZEC, and DASH.

A facility that I was at today seems to have a bit of a moisture issue. The ground seems to be covered in water droplets as well as puddles in some parts.

Obviously I am not worried about a slip risk, but more about what kind of damage this could do to the miners or to the maintenance workers, since some of the puddles are near the breaker panels.

How much of an issue do you guys think that this moisture presents? Pics below.

https://imgur.com/gallery/deXVwBh

So this is a question that I've been wondering about for a while, but now I am even more motivated to find the answer due to the recent release of the "Low Power Mode" firmware from bitmain, which is autotune and doesn't seem to have a fixed frequency option.

The question is, how does the S9 know what its hashrate is supposed to be? For example, I took one S9_13.5T and one S9_14.0T and flashed the Antminer-S9-LPM-20181023.tar.gz to both. Afterwards, the S9_13.5T still "autotuned" to 13.5 THs, same with the 14.0T.

I was under the impression that flashing a new firmware overwrote the old filesystem. How then is it possible for the S9 to "remember" its assigned hashrate? Where is this value stored, and how can we change it?

It would be great if we could "autotune" the S9 to 15 TH while it is on the "Low Power Mode" autotune firmware. I'm mainly only familiar with the fixed frequency firmwares / bmminers so I would really appreciate any insight into how the "autotune" firmwares work. Thanks!


By its assigned hashrate, I am referring to the "fixed rate" displayed in the log:

S9_13.5T after flash:

Code:

miner total rate=13772GH/s fixed rate=13500GH/s

S9_14.0T after flash:

Code:

miner total rate=14014GH/s fixed rate=14000GH/s

Hi everyone,

I have one DragonMint T1 in a facility that lost power a couple days ago due to a passing storm. Now, when the T1 boots, it will not mine.

Code:

Oct 13 12:49:22 dragonMint cgminer[1480]: Started cgminer 4.10.0
Oct 13 12:49:22 dragonMint cgminer[1480]: Loaded configuration file /etc/cgminer.conf
Oct 13 12:49:22 dragonMint cgminer[1480]: Error in configuration file, partially loaded.
Oct 13 12:49:22 dragonMint cgminer[1480]: Probing for an alive pool
Oct 13 12:49:22 dragonMint cgminer[1480]: Pool 0 difficulty changed to 8192
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] b9 pin:957,a10 pin:943
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] b9 pin:957,a10 pin:943
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] b9:1,a10:1,val:0x00000003
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] cow vid vid
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] b9:1,a10:1,val:0x00000003
Oct 13 12:49:22 dragonMint dm-monitor[1274]: [INFO:2018-10-13 12:49:22.738] cow vid vid
Oct 13 12:49:23 dragonMint cgminer[1480]: Pool 1 difficulty changed to 8192
Oct 13 12:49:23 dragonMint cgminer[1480]: Failed to fread size 8 nmemb 1 from dragonmint_t1.c dragonmint_get_hwver line 1198
Oct 13 12:49:23 dragonMint cgminer[1480]: sys : platform[4] miner_type[1] chain_num[3] chip_num[68]
Oct 13 12:49:24 dragonMint cgminer[1480]: vid type detected: 0
Oct 13 12:49:24 dragonMint cgminer[1480]: fan speed set to 100
Oct 13 12:49:24 dragonMint cgminer[1480]: T1: checking T1 chain
Oct 13 12:49:24 dragonMint cgminer[1480]: chain0: spi speed set to 390K
Oct 13 12:49:24 dragonMint cgminer[1480]: ERROR - failed to recv spi data
Oct 13 12:49:24 dragonMint cgminer[1480]: failed to reset chain 0!
Oct 13 12:49:24 dragonMint cgminer[1480]: chain1: spi speed set to 390K
Oct 13 12:49:24 dragonMint cgminer[1480]: ERROR - failed to recv spi data
Oct 13 12:49:24 dragonMint cgminer[1480]: failed to reset chain 1!
Oct 13 12:49:24 dragonMint cgminer[1480]: chain2: spi speed set to 390K
Oct 13 12:49:25 dragonMint cgminer[1480]: ERROR - failed to recv spi data
Oct 13 12:49:25 dragonMint cgminer[1480]: failed to reset chain 2!

The "ERROR - failed to recv spi data" is present for all 3 boards. I tried both soft reboot and hard reboot, no change. Any ideas?

Update: Got 1 board back after another reboot, but then it dropped back out due to too many resets. So we are back to square one. Here is a copy of the most recent log - https://pastebin.com/M7j8ywNT

I want to share some graphs that show the efficiency of the APW3, APW3++, and APW7 at 230V as well as the APW3++ at 115V. The APW7 also works at 115V with 1000W rated max output but I wasn't able to find any detailed efficiency info at the time. All info is sourced from Bitmain and roughly verified by testing the PSUs.