ANTMINER S2 Discussion and Support Thread

[smooth]

i have a problem with all of my antminer s2.

it keeps turning off after 15-30min hashing, then it need to be unplug for 5 min before it can be turn on again. anyone having the same problem?
perhaps firmware issue or other known issue ??

btw, how to control the fan?

PSU it is!

Sounds like it. Quick test and sort-of fix is to pull one board.

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[tzortz]

Here is the delivery guy for S2s.

[MikeMike]

i have a problem with all of my antminer s2.

it keeps turning off after 15-30min hashing, then it need to be unplug for 5 min before it can be turn on again. anyone having the same problem?
perhaps firmware issue or other known issue ??

btw, how to control the fan?

PSU it is!

Sounds like it. Quick test and sort-of fix is to pull one board.

Put it in the coolest place and on floor if possible.
Just a few degrees may allow it to run for now.

[AdvocateOne]

i have a problem with all of my antminer s2.

it keeps turning off after 15-30min hashing, then it need to be unplug for 5 min before it can be turn on again. anyone having the same problem?
perhaps firmware issue or other known issue ??

btw, how to control the fan?

Check the gauge of your power cord? Use a heavy duty.  This fixed the very same problem for me.

[18602981897]

优点

完全去处中心化，没有发行机构，也就不可能操纵发行数量。其发行与流通，是通过开源的p2p算法实现。
匿名、免税、免监管。
健壮性。比特币完全依赖p2p网络，无发行中心，所以外部无法关闭它。比特币价格可能波动、崩盘，多国政府可能宣布它非法，但比特币和比特币庞大的p2p网络不会消失。
无国界、跨境。跨国汇款，会经过层层外汇管制机构，而且交易记录会被多方记录在案。但如果用比特币交易，直接输入数字地址，点一下鼠标，等待p2p网络确认交易后，大量资金就过去了。不经过任何管控机构，也不会留下任何跨境交易记录。
山寨者难于生存。由于比特币算法是完全开源的，谁都可以下载到源码，修改些参数，重新编译下，就能创造一种新的p2p货币。但这些山寨货币很脆弱，极易遭到51%攻击。任何个人或组织，只要控制一种p2p货币网络51%的运算能力，就可以随意操纵交易、币值，这会对p2p货币构成毁灭性打击。很多山寨币，就是死在了这一环节上。而比特币网络已经足够健壮，想要控制比特币网络51%的运算力，所需要的cpu/gpu数量将是一个天文数字。

[tzortz]

Are you sure about that?

[ElGabo]

优点

完全去处中心化，没有发行机构，也就不可能操纵发行数量。其发行与流通，是通过开源的p2p算法实现。
匿名、免税、免监管。
健壮性。比特币完全依赖p2p网络，无发行中心，所以外部无法关闭它。比特币价格可能波动、崩盘，多国政府可能宣布它非法，但比特币和比特币庞大的p2p网络不会消失。
无国界、跨境。跨国汇款，会经过层层外汇管制机构，而且交易记录会被多方记录在案。但如果用比特币交易，直接输入数字地址，点一下鼠标，等待p2p网络确认交易后，大量资金就过去了。不经过任何管控机构，也不会留下任何跨境交易记录。
山寨者难于生存。由于比特币算法是完全开源的，谁都可以下载到源码，修改些参数，重新编译下，就能创造一种新的p2p货币。但这些山寨货币很脆弱，极易遭到51%攻击。任何个人或组织，只要控制一种p2p货币网络51%的运算能力，就可以随意操纵交易、币值，这会对p2p货币构成毁灭性打击。很多山寨币，就是死在了这一环节上。而比特币网络已经足够健壮，想要控制比特币网络51%的运算力，所需要的cpu/gpu数量将是一个天文数字。

?

[freebit13]

优点

完全去处中心化，没有发行机构，也就不可能操纵发行数量。其发行与流通，是通过开源的p2p算法实现。
匿名、免税、免监管。
健壮性。比特币完全依赖p2p网络，无发行中心，所以外部无法关闭它。比特币价格可能波动、崩盘，多国政府可能宣布它非法，但比特币和比特币庞大的p2p网络不会消失。
无国界、跨境。跨国汇款，会经过层层外汇管制机构，而且交易记录会被多方记录在案。但如果用比特币交易，直接输入数字地址，点一下鼠标，等待p2p网络确认交易后，大量资金就过去了。不经过任何管控机构，也不会留下任何跨境交易记录。
山寨者难于生存。由于比特币算法是完全开源的，谁都可以下载到源码，修改些参数，重新编译下，就能创造一种新的p2p货币。但这些山寨货币很脆弱，极易遭到51%攻击。任何个人或组织，只要控制一种p2p货币网络51%的运算能力，就可以随意操纵交易、币值，这会对p2p货币构成毁灭性打击。很多山寨币，就是死在了这一环节上。而比特币网络已经足够健壮，想要控制比特币网络51%的运算力，所需要的cpu/gpu数量将是一个天文数字。

Advantage

Completely centralized place , no issuer , it is impossible to manipulate the issue number . Its issuance and circulation through open source p2p algorithm.
Anonymous , duty-free regulation.
Robustness. Bitcoin is entirely dependent on p2p networks, no distribution center , so the outside can not turn it off. Bitcoin prices may fluctuate , crash , many governments may declare it illegal , but the huge Bitcoin and Bitcoin p2p networks will not disappear.
Without borders, cross-border . Transnational remittances, foreign exchange will go through layers of regulatory bodies, and the transaction will be multi- documented. But if Bitcoin transactions , direct input numeric address , click, wait p2p network to confirm transactions , a lot of money over. Without any control mechanism , it will not leave any cross-border transactions.
Cottage were difficult to survive. Since Bitcoin algorithm is completely open source , anyone can download the source code, modify these parameters , recompiling , we can create a new p2p currency. But these cottage currency is very fragile and vulnerable to the attack was 51% . Any individual or organization , as long as the control one kind of currency p2p network 51% of computing power , you can freely manipulate the transaction currency , which would constitute a devastating blow p2p currency . Many cottage coins that died on this link . The Bitcoin network has been robust enough bitcoin network wants to control 51% of the computing power , the number of cpu / gpu need to be an astronomical figure.

[ElGabo]

I can't get how this comes to antminer topic? 

[User705]

Is BTC6.5 bad investment for batch 3?

IMHO yes...not a good investment...

Let's do some math... S1 is 0.831 BTC ...or $410-415 ( @112Bit as well)...

S2 is generally replicated 5 x S1 ...in a rack box ...10 blades vs 2 blades design...900Gh vs 1000Gh

So $410 x 5 = around $2,000 ...add 1 more blade ...around $2,100 ...all other parts, including PSU, case, LED etc are maybe another $100 at cost...$2,200...but they are saving of 4 controllers less...and they are not so cheap...

My guess is that In May we will see price in the $2,000 and a change range...

What do you think...? Am I missing something...?  

S2 is way over priced BUT saves on electricity.
Still overpriced though...

S1 and S2 are priced about the same per chip.  Ten times as many chips ten times the price.

[daxhollow]

I have a major problem and need troubleshooting help! Today all 3 of my 1TH/s miners stopped working.  One stopped working after mining non-stop for a couple of weeks (it was left alone and untouched) so it couldn't of been hit at all. I turned it off and back on, nothing. I ordered a total of 3 from batch one and today all 3 stopped working after i turned them off and back on! all i did was power down and turn them back on & the screen just displays a dark blue square, a red light & the fans always run full blast, I cant even see them on my network. I find it strange that all 3 decided to kick the bucket on the same day. Should I RMA all 3 i'm not sure what to do.

[imar2014]

I have a major problem and need troubleshooting help! Today all 3 of my 1TH/s miners stopped working.  One stopped working after mining non-stop for a couple of weeks (it was left alone and untouched) so it couldn't of been hit at all. I turned it off and back on, nothing. I ordered a total of 3 from batch one and today all 3 stopped working after i turned them off and back on! all i did was power down and turn them back on & the screen just displays a dark blue square, a red light & the fans always run full blast, I cant even see them on my network. I find it strange that all 3 decided to kick the bucket on the same day. Should I RMA all 3 i'm not sure what to do.

wait 10 minutes then try again.

[MikeMike]

I have a major problem and need troubleshooting help! Today all 3 of my 1TH/s miners stopped working.  One stopped working after mining non-stop for a couple of weeks (it was left alone and untouched) so it couldn't of been hit at all. I turned it off and back on, nothing. I ordered a total of 3 from batch one and today all 3 stopped working after i turned them off and back on! all i did was power down and turn them back on & the screen just displays a dark blue square, a red light & the fans always run full blast, I cant even see them on my network. I find it strange that all 3 decided to kick the bucket on the same day. Should I RMA all 3 i'm not sure what to do.

wait 10 minutes then try again.

Shut off PSU by the switch on it.
Wait till it cools.
Restart.

Run heavier cable and in cooler area and/or on the floor or basement etc.

[tzortz]

I am sure they got delivered like this:

[dalenorman2005]

I have a major problem and need troubleshooting help! Today all 3 of my 1TH/s miners stopped working.  One stopped working after mining non-stop for a couple of weeks (it was left alone and untouched) so it couldn't of been hit at all. I turned it off and back on, nothing. I ordered a total of 3 from batch one and today all 3 stopped working after i turned them off and back on! all i did was power down and turn them back on & the screen just displays a dark blue square, a red light & the fans always run full blast, I cant even see them on my network. I find it strange that all 3 decided to kick the bucket on the same day. Should I RMA all 3 i'm not sure what to do.

you might just be the only batch 1 owner who has not yet had to deal with this issue.  I think everyone deals with it sooner or later.
don't try to RMA your miners - they are not busted.

read back 20 pages or so, and you'll see discussions of these two problems:

-power supply stuck off.  it happens because the power supply has a piece of wire shorting two pins to force it to turn on and stay on all the time.  when you kill the power, it refuses to power on again for about 5 minutes.  just wait.

-SD card corrupt.  this one is more of a pain in the ass.  you have to remove it, reflash it and reinstall it.  again, detailed directions on how to do so further back in this thread.  but don't bother resorting to this until you've tried turning it off and on again (with 5 mins in between) at least 5 times.  it might just boot up on it's own.

[daxhollow]

use this program: http://sourceforge.net/projects/win32diskimager/

https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip
Taken from an actual S2

I downloaded that program and the Bitmain.img file in the quotes but My win32 disk Imager program doesn't offer any option to format. I can format in windows explorer under fat32 I used "Default Unit Size" as Allocation unit size optionquick format checked. I tried to do this to one miner and it worked! Only after i bought a new micro sd card, I think re-writing the micro sd a bunch of times corrupted it. I'll try the same on the other two now.

OK Update.. Good news all 3 1TH/s miners are hashing, the problem was with the Micro SD cards. 3 new Verbatim 8gb cards & it works.

[mdopro1]

Glad you got the SD card issue out of the way. My batch 3 miner should be coming soon and I'm ready for the frustration.

[Soros Shorts]

use this program: http://sourceforge.net/projects/win32diskimager/

https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip
Taken from an actual S2

I downloaded that program and the Bitmain.img file in the quotes but My win32 disk Imager program doesn't offer any option to format. I can format in windows explorer under fat32 I used "Default Unit Size" as Allocation unit size optionquick format checked. I tried to do this to one miner and it worked! Only after i bought a new micro sd card, I think re-writing the micro sd a bunch of times corrupted it. I'll try the same on the other two now.

OK Update.. Good news all 3 1TH/s miners are hashing, the problem was with the Micro SD cards. 3 new Verbatim 8gb cards & it works.

If you SSH into the OS and do a shutdown prior to powering down, you will greatly reduce the chances of trashing your SD card. The problem is likely to happen when you power off while a program is writing data to the file system. MBP Bitfury rigs delivered last year also had the same problem. Of course, getting good SD cards like you did also helps a lot.

[smooth]

use this program: http://sourceforge.net/projects/win32diskimager/

https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip
Taken from an actual S2

I downloaded that program and the Bitmain.img file in the quotes but My win32 disk Imager program doesn't offer any option to format. I can format in windows explorer under fat32 I used "Default Unit Size" as Allocation unit size optionquick format checked. I tried to do this to one miner and it worked! Only after i bought a new micro sd card, I think re-writing the micro sd a bunch of times corrupted it. I'll try the same on the other two now.

OK Update.. Good news all 3 1TH/s miners are hashing, the problem was with the Micro SD cards. 3 new Verbatim 8gb cards & it works.

If you SSH into the OS and do a shutdown prior to powering down, you will greatly reduce the chances of trashing your SD card. The problem is likely to happen when you power off while a program is writing data to the file system. MBP Bitfury rigs delivered last year also had the same problem. Of course, getting good SD cards like you did also helps a lot.

Has anybody figured out why this is happening? I can't find anything in the OS that writes to the file system.

[MikeMike]

use this program: http://sourceforge.net/projects/win32diskimager/

https://dl.dropboxusercontent.com/u/16075357/bitmain.img.zip
Taken from an actual S2

I downloaded that program and the Bitmain.img file in the quotes but My win32 disk Imager program doesn't offer any option to format. I can format in windows explorer under fat32 I used "Default Unit Size" as Allocation unit size optionquick format checked. I tried to do this to one miner and it worked! Only after i bought a new micro sd card, I think re-writing the micro sd a bunch of times corrupted it. I'll try the same on the other two now.

OK Update.. Good news all 3 1TH/s miners are hashing, the problem was with the Micro SD cards. 3 new Verbatim 8gb cards & it works.

If you SSH into the OS and do a shutdown prior to powering down, you will greatly reduce the chances of trashing your SD card. The problem is likely to happen when you power off while a program is writing data to the file system. MBP Bitfury rigs delivered last year also had the same problem. Of course, getting good SD cards like you did also helps a lot.

Has anybody figured out why this is happening? I can't find anything in the OS that writes to the file system.

I'm way out of my league here BUT
IF you have more than one S2 I found I could copy the good file from one SD card and then
after deleting all the files on the other card just paste them in.
Of course you need to only have one running at a time since both would have the same IP address
and would need it to be changed to another...so you don't have conflicts...that can cause problems too
needing to do a reset to default.
You could also just have someone mail you the SD cards contents IF you only have 1-S2...