Why not buy a bigger miner if electricity is free. If electricity was free here then I bought for sure a few miners.

How do you compile cgminer?  Sorry, I'm a noob and wasn't able to find that information or which directory it's supposed to be run from in RPi.  What would the command be?  From what I've read, you have to enable the block-erupter when you use Minera because the default is set to disabled.

When I bought my Prisma, it came with the RPi and Minera installed so I didn't have to do anything to get it working.  But, from what I've read from michelem's github, all you're supposed to do is put the image file onto your SD card and then you should be able to access it via http://<IP address that's assigned to it>/minera
https://github.com/michelem09/minera

Within the Minera app, when you go to Settings, Local Miner, it lets you "Select your preferred miner software" with the options of CPUminer (GC3355 fork), BFGminer 5.x (Official), CGminer 4.x (Official), and CGminer (Dmaxl Zeus fork).  I've selected CGminer 4.x (Official) but it doesn't recognize my Prisma.

If you broke the cgminers, you should be able to rebuild it by:
cd /var/www/minera
./build_miner.sh <miner-name>

That's included in the link above too, under the section "Building miner software".

I agree, it is very annoying not being able to set it up easily.  I've read a lot of people having difficulties too.  

Hi Everyone,

I got my EU version of the compac through rom bitshopper.de to play with and I have an interesting issue with my stick that I'd appreciate some input on.

I can get the stick hashing ok from BFGMiner since it doesn't get detected by the novak version of cgminer but I have read that this is a known thing so that doesn't really bother me.

Then things get interesting as it will sit happily at around 10-11 GHs and then after what feels like a few minutes the hash rate starts dropping down slowly to zero so I started to investigate.

I got my mains plug power meter and stuck that between the wall socket and the power supply for my admittedly crappy (!) USB hub and when its hashing its drawing about 7.1W from the wall but then it drops out to hardly anything when the has rate starts dropping and putting a DMM on the stick reveals that I have no vCore voltage when this happens but the rest of the voltage rails check out ok!?

Has the stick upset my crappy hub and activated some sort of protection? Taking the USB and power off the hub and plugging it back in restores the vCore on the stick and it will hash again which is making me think its the hub doing something.

The hub is powered by a 5V 2A wall wart style power supply.

I find it interesting that the power is still going to the stick since the green LED stays on and I thought if a USB port "trips" due to power consumption it cuts the power? or perhaps it limits the power?

Do you think a USB Y-Cable would sort the above if its a, per port on the hub, power related issue? Maybe I need a new hub?

I have to wonder how much of the zombie issue is U3 specific, and how much of it is USB miners in general, as I saw far-too-frequent zombies out of the Gridseed blades (not daily, but usually more than once a week per blade).

Hi everybody.  I'm new to Bitcoin mining and recently purchased an Antminer S3 and an ASICMiner Prisma.  I got the S3 up and running with no problems, however the Prisma is giving me a lot of difficulties.  It's a version 1.0, with a USB adapter to a Raspberry Pi with the latest Minera update installed.  I followed Dogie's Comprehensive setup and have searched everywhere for a possible solution but to no avail.  Within Minera, it says "No local devices found".  I tried connecting only one of the boards and also 2 separate USB adapters, but it still won't work.  I read online that you're supposed to --enable-blockerupter but I'm not sure where I'm supposed to run that.  Any help would be greatly appreciated!

I'm a young miner that has been in the bitcoin community since 2011 and was deep into bitcoin back when the original $1000+ jumps were happening and made some money with it.. the problem is i've been away for a while and i'm having trouble finding the best miner (50Gh-100) That's power efficient and not a crazy amount so maybe with altcoins there could be a jump in value. anyone have any suggestions at todays current best power efficient miners? Thanks!

The key phrase to my response was no one is able to get it from you, which in this case, he is making it easy (relatively) for someone to steal the Bitcoin from him. However as long as he has the wallet.dat file, then he has the private keys and he will be able to spend any Bitcoin associated with the addresses associated with those private keys. Whether the Bitcoin remains there is up to his security, but he will continue to possess the private keys necessary to spend what is left as long as he has the wallet.dat and it remains uncorrupted.

Had I known you had more S3's to sell the other week I would have grabbed them in a second! If you don't end up selling them, then please keep me in mind. Bump for a great honest seller, mindtrip is the real deal.

No, you are fine. The private keys are stored in the wallet.dat. They are protected by your passphrase. As long as you don't lose that file and no one is able to get it from you, then your Bitcoin is safe.

I understand now, btw generating a vanity address on your server was like 0.8 and I can't afford it so please cancel that order, I will think of a shorter name and try again.

not for the next 4 months, not in their roadmap..

Yes but remind him to have 2 USB sticks because if one can get damaged the guy don't know his private keys, he should print those too! security is number 1.

XD

If your computer is online when the wallet was created, then some virus on your computer logs your wallet password and sends the wallet file to someone else who can now spend your money.

Say the computer was online (you had to be to download Bitcoin Core) so it got a virus. You make it offline but the virus is still there. When you make the wallet, it records your password and copies the file. Then when you go back online it sends it to an attacker and he just stole your Bitcoin.

It doesn't matter whether Bitcoin Core is presently installed or not, as long as the attacker has the wallet file and your password, the money is gone. To be fully secure, you need to create the wallet and any cold storage wallet for that matter on an offline computer that has never been online in the past. This includes virtual machines since a virtual machine running on a compromised host is just as bad as using Bitcoin on a compromised computer.

What if i don't have an extra computer? 

I am confused about how to store bitcoins offline,



1. I downloaded the bitcoin core client

2. I went to settings>Encrypt Wallet and made a password.

3. i transferred my bitcoins into the wallet.

4. I went to File>Backup Wallet

5. Now i have a file called money.dat on my desktop


What do i do now?  Do i delete my bitcoin core client?  install a fresh one with 0 bitcoins

and then put the money.dat into a usb key?   and later when i want to get my money just load the money.dat into the wallet

And to get into the money.dat file is to remember my encrypt password that i made up?



I'm a little confused

I figure OP wants it cheaper and paid with BTC

When you have the tools to do it, only need a few made and have some spare time, it's often cheaper and more rewarding to do it yourself than to buy something that's manufactured by someone else.

Your setup is quite nice, and does the job.
My only concern is the fact that it takes a lot of space (assuming you'll protect the bare copper plates for your own safety)

I want to purchase some new asic miners. are there any asic miners that use the 22nm fab process or lower?

I have a lot of distaste for antminer because of the u3's that I have. What are some other brands out there?

There ìs a chance but like everyone said the chance of hitting a block to get that reward is so minute.  If you have spent a good bit of cash on those erupters and can't get a refund you could use them to mine some altcoins maybe to make some of your dough back.

I'm wondering also what pool you are using and what your level of hash power is because that looks like a crazy low amount for a month.

I've been mining for awhile now on Slush and recently transitioned my miners to a smaller pool. It's been about 3 days now and I've been thinking and learning a lot more by speculation on this forum and the operation of this small pool I am on.

Question:

  When pools are mining, are they all mining the same block or different separate blocks that the pool is locked in to until the block is solved then another block is locked into the pool?