First Impressions - Mining-asics-technologies.com 250 MH/s Excaliber Miner

[shoggot]

Has anyone tried to flash an alcheminer firmware?

[Zeta0S]

Has anyone tried to flash an alcheminer firmware?

Yes, a friend of mine did, the alcheminer firmware is superior

[marcoman22]

Has anyone tried to flash an alcheminer firmware?

Yes, a friend of mine did, the alcheminer firmware is superior

How much increase in performance over the old one.

[shoggot]

how did you flash it?

[shoggot]

Also the only open port on my miner is ssh (22). And i dont have the login. Anybody have that? or how do i factory reset it?

[Zeta0S]

Also the only open port on my miner is ssh (22). And i dont have the login. Anybody have that? or how do i factory reset it?

You sure you want go go down that road? The gain is minimal and the powerdrain gets up.
And there can go things wrong, if so MAT can`t help you anymore.

[shoggot]

MAT has gone bankrupt so there will be no new support from them. I managed to get it working. Will update to Alcheminer this week. This miner uses ubuntu and the only files it changes are located in the admin home folder. So there is no chance of a brick. It is still linux so it should be easy to do it manually. Will post my findings here.

[shoggot]

Did the upgrade now. Preliminary results are much faster and more stable. Will post a how to later for all. went from version 1.09 web and 1.05 miner to 1.10 web and 1.14 miner.

[grantycoiner]

Hello miners
I have a MAT excalibur 5 that I need firmware update for it. HELP me pleas
It is runin on version 1.09 web and 1.05 miner and is not hashing correctly..

[Zeta0S]

Start bidding on three original MAT Excalibur and Titanium brochure  

Shipping Worldwide this unique peace of scam propaganda.

Funds from this sale will be used to buy drugs and alcohol to forget this ass rape.  






Accepted payment: Bitcoin, also Lottocoin, Moon etc. etc.. and shitcoins (if i get the wallets to work)

[Marvell1]

Running an Alchemist 256 box right now the unit is very loud but very well built.

Has software issues though , i think it needs some work on the miner code to improve effiency and pool performance.

Seeing a 20-30% reject rate and alot of failed getworks  on Vardiff pools

[Marvell1]

Interesting stuff I found this snippet of code in the miner that is curoious ? seems like a specific flag for ghash-io

Code:

 if not self.isRunning:
            if ('ghash.io' in stratum_host):
                self.proxy = subprocess.Popen(['/usr/bin/python', 'stratum-mining-proxy/mining_proxy.py', \
                                                '-o', stratum_host, '-p', stratum_port, '-gp', getwork_port , \
                                                '-cu', username, '-cp', password, '-pa', 'scrypt', \
                                                '-nm', '-q'], stdout=subprocess.PIPE, shell=False)
            else:
                self.proxy = subprocess.Popen(['/usr/bin/python', 'stratum-mining-proxy/mining_proxy.py', \
                                                '-o', stratum_host, '-p', stratum_port, '-gp', getwork_port , \
                                                '-cu', username, '-cp', password, '-pa', 'scrypt', \
                                                '-nm', '-cd', '-q'], stdout=subprocess.PIPE, shell=False)
            self.isRunning = True

I checked the default stratum proxy code and there is no flag -cd in the default code, and it seems to be removed if you are using ghash.io which the Alcheminer recommends kind of strange to me

anyone know of a remote debugging tool I could use to step through the code as the miner runs and look at current variable values ?  The os is debian/Linux

[shoggot]

I have tried a few pools and wemineltc gives 12% rejects but ghash.io only gives abort 5%.

[Marvell1]

I have tried a few pools and wemineltc gives 12% rejects but ghash.io only gives abort 5%.

Cant get it to work on Ghash-io , it starts mining then hash rate goes to from 250k to nothing in about 15 minutes.

I have a detailed post on litecoin talk

https://litecointalk.org/index.php?topic=21959.msg256801#msg256801

[shoggot]

I also had problems for a week but it started working again yesterday.

[Marvell1]

I also had problems for a week but it started working again yesterday.

Thanks maybe i will give it another shot, I only get around 7 or so coins a day on WmeinLTC and i was getting near 9 on Ghash-io due to the lower rejects.

thanks for the tip.

I still feel the miner uses way too much power for its hashrate.  I noticed that even when it is not mining (i.e having connection issues) the wattage use does not change at all.

That leads me to belive the ASICs are constatly throttled up even when the have no work to do which is really innefficent.

Tthe code needs to be fixed to allow for easier changing of chip frequencies and also issues with Vardiff pools.

The fact that the miner does not work on any multipool due to its issues with Vardiff is a big problem. 

[shoggot]

I checked the stratum code a little and alcheminer changed three files in the stratum proxy. They added a parameter called check difficulty which is the -cd paramater that is not present in any other codes on github. I think it will be easy to rewrite slush0 version 1.56 to support this miner. Will try a few things tomorrow. We should also replace -pa scrypt with only -st.

[Marvell1]

I checked the stratum code a little and alcheminer changed three files in the stratum proxy. They added a parameter called check difficulty which is the -cd paramater that is not present in any other codes on github. I think it will be easy to rewrite slush0 version 1.56 to support this miner. Will try a few things tomorrow. We should also replace -pa scrypt with only -st.

That sounds like a plan.  i noticed that -pa and the -cd as well.  They might be doing some stuff custom with the proxy code which makes it hard to modify the code safely withoute at diff comparision with version 1.3 of Slush0 first to make sure its identical.

I created a backup of the code but another issue is we might have to install some packages (newer versions of dependencies) on the liniux install witch has the potential to mess up the miners OS. 

The box does not have a USB drive so I cant see a way to restore the OS from backup if something gets screwed up.

what are the three files that were changed ?

[Zeta0S]

Alcheminer lowers price tag
http://www.bitcoinupdate.nl/home/alcheminer-verlaagt-prijzen-miners

[shoggot]

i Updated to this stratum proxy:  https://github.com/pooler/stratum-mining-proxy

I had to rewrite a few things and move some functions from the old alcheminer stratum.

I have gotten theese stats so far:
Since: 2015/3/11 13:56:54, accepted / rejected: 1385 / 103  17:42:20

So it is handling vardiff much better now. But will need to run 24hours to make sure it is working better.

Will try to check what is improved in slush0 proxy (couldnt get that one to work) and se if i can merge it.
Then i might start looking at pool failover and a mail function when a pool fails. If i get the time that is.

I am thinking about accepting donations later if i start to put some time into it. But all releases will be free for all.