Swedish ASIC miner company kncminer.com

[Meizirkki]

Indeed, Avenger posted some epic ones (hint: there is more).


If you want to squeeze more performance out of your RPi:

1) SSH to titan as root
2) edit file '/boot/config.txt'
3) add

Code:

arm_freq=900
core_freq=450
sdram_freq=450
force_turbo=1

4) reboot
5) if you like, verify clock speed 'cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq'


*note:
max values were not stable, so I reduced them by 10%
arm_freq=1000
core_freq=500
sdram_freq=500

OCing may corrupt the SD card very quickly. Be careful

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[Prelude]

Has OCing the pi shown any benefit for you? After a few minutes of looking at top, the highest usage I saw was ~87% of the pi's CPU across all processes. Doesn't seem to be a bottleneck.



I do have 2 dead DC/DC, though.

[Prelude]

Ok, OCed mine a bit.

Code:

arm_freq=900
core_freq=250
sdram_freq=400
force_turbo=1

Only OCed the CPU from 700MHz to 900MHz. I see no point OCing the GPU and RAM for this purpose. I'm guessing OCing the RAM especially could lead to issues with the SD card?

Doesn't seem to have made much of a difference:



Advanced tab does load a bit quicker, though.

[tolip_wen]

Disclaimer: I have no Titan but I do dabble with RPi on occasion.
I have also been using Linux for over 20 years.
Back in the days of expensive RAM, swap problems were on most peoples radar.

I think the SD corruption is caused by 'swap' partition.

Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine...
The miner has a slow RAM leak.
I'd guess 6-8 days till it runs out of RAM
(based on the tiny sample of 2 screenshots)

If/when it runs out of RAM it starts using the swap partition for RAM storage.

With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance.

With swap on an SD card expect worse performance.
Using an SD for swap could be expected to kill the SD card also.
IMneverHO

If it were mine I would eliminate the swap partition and learn to live with available RAM.
I'd consider it better that the miner just stop and reboot when RAM is exhausted.
I doubt it would keep mining anyways because swap is too slow to use as RAM.
At least it would restart without SD corruption.

A class 10 SDcard might help but they were not designed for random access usage.


YMMV

[Prelude]

Disclaimer: I have no Titan but I do dabble with RPi on occasion.
I have also been using Linux for over 20 years.
Back in the days of expensive RAM, swap problems were on most peoples radar.

I think the SD corruption is caused by 'swap' partition.

Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine...
The miner has a slow RAM leak.
I'd guess 6-8 days till it runs out of RAM
(based on the tiny sample of 2 screenshots)

If/when it runs out of RAM it starts using the swap partition for RAM storage.

With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance.

With swap on an SD card expect worse performance.
Using an SD for swap could be expected to kill the SD card also.
IMneverHO

If it were mine I would eliminate the swap partition and learn to live with available RAM.
I'd consider it better that the miner just stop and reboot when RAM is exhausted.
I doubt it would keep mining anyways because swap is too slow to use as RAM.
At least it would restart without SD corruption.

A class 10 SDcard might help but they were not designed for random access usage.


YMMV

Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition?

[tolip_wen]

Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition?

I suggest keep an eye on 'top'.
In particular the "KiB Mem:" line.
Reboot before 'free' reaches zero.

I made my observation on just 2 snapshots and noticed increased RAM usage.
It might level off in which case there is a different cause of SD corruption.

Next on the list is lack of resources.
Any load level above 1.0 is sub optimal.
Even OC'd there is a bottleneck.

I would definately NOT always have a web page open on the miner.
I'd consider not always having 'screen' running.
I'd also only run 'top' when I was gonna look, it uses resources too.


YMMV

[s1gs3gv]

Any recent Titan shipments received ?

Anybody who paid on day 2 receive a Titan yet ?

[jelin1984]

I can not understand why so slow

With Jupiter they had ship all the batch 1 until one month
And now why
They do that

[bee7]

Disclaimer: I have no Titan but I do dabble with RPi on occasion.
I have also been using Linux for over 20 years.
Back in the days of expensive RAM, swap problems were on most peoples radar.

I think the SD corruption is caused by 'swap' partition.

Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine...
The miner has a slow RAM leak.
I'd guess 6-8 days till it runs out of RAM
(based on the tiny sample of 2 screenshots)

If/when it runs out of RAM it starts using the swap partition for RAM storage.

With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance.

With swap on an SD card expect worse performance.
Using an SD for swap could be expected to kill the SD card also.
IMneverHO

If it were mine I would eliminate the swap partition and learn to live with available RAM.
I'd consider it better that the miner just stop and reboot when RAM is exhausted.
I doubt it would keep mining anyways because swap is too slow to use as RAM.
At least it would restart without SD corruption.

A class 10 SDcard might help but they were not designed for random access usage.


YMMV

Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition?

The same disclaimer: I have no KNC products.

You need not to reboot it every 5 days unless there is a memory leak so it stops to work or respond.

Looking at the Top screenshot I see that there is a plenty of free RAM. Also, there is zero of swap space used. So I do not see the point to have a swap partition enabled at all.
To disable swap partition open the /etc/fstab file and comment out the line that has 'swap' word in it by putting the sharp character ('#') at the beginning of the line, then save file and reboot. Should you have any issues with web interface or anything else due to exactly this tuning you may re-enable swap by removing the comment.

Anyway, provided that swap is most likely not used the one thing that may actually kill the SD cards (apart from improper power off sequence) is a frequent writes the OS does to the file system when it accesses any file if the file system mounted with default options. By default the system updates last access time on each file it accesses (even for read only operation on a file). So each time when a new process is spawned its atime is updated. When any script is run by the cron job for example, all related files have their atime updated. To change that behavior you need to change the options used to mount the file system. In the same /etc/fstab file locate the lines related to the persistent file systems:

Code:

/dev/mmcblk0p1  /boot           vfat    defaults,noatime,nodiratime          0       2
/dev/mmcblk0p2  /               ext4    defaults,noatime,nodiratime  0       1

This is as I set it for my RPi that runs for more than a year inside bitfury based miner with the same SD card (a cheap one, I don't recall the brand). The place where this miner installed sometimes has power outages (once-twice a month) but even these events did not kill the SD in my miner.

The tips are greatly appreciated if the thing above helps someone.
14NY8VQTaCSFBuY4Dnrchr5ayXFRr2Nu5p

[Dek52]

KNC engineers dragged away from their 16mm chip development for their data farm to work on Titan.....yes they are confused/upset/and wondering why they
are bothering ..90 day warranty and no refunds so from their point of view why bother? The equip will likely not last 90 days anyway!

http://images2.wikia.nocookie.net/__cb20081215194208/muppet/images/6/6c/Muppets-com79.png

yes, YES!  This picture fkn nails it!!!!

Hey,  what the hell you replying to this post you didn't buy this hunk of shit called a Titan.  Furthermore, change your avatar, it makes me want to play with my chicken.   

[GodFinans_Henrik]

Hi all,

My name is Henrik Ask and I represent a debt collector in Sweden called God Finans (Good Finance in english).
I just got a case from a client here in Sweden who had not got his refund on a Neptune and we helped him get his money back.

As I understand it there are more people out there that have claims on KnC Miner. Please feel free to contact me and I will be glad to help you get your money back.

You can contact me on henrik.ask@godfinans.nu

[coda]

i'll send you a email now !
people come on ! lets sue this assholes

[xyzzy099]

i'll send you a email now !
people come on ! lets sue this assholes

I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers...

[coda]

i'll send you a email now !
people come on ! lets sue this assholes

I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers...

thank you for worrying for me
i think it's legit http://www.godfinans.nu/en-GB

[xyzzy099]

i'll send you a email now !
people come on ! lets sue this assholes

I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers...

thank you for worrying for me
i think it's legit http://www.godfinans.nu/en-GB

yw, good luck.

[dogie]

This company's rating has been updated in the Manufacturer Trustworthiness thread.

[This message won't be monitored, discuss your concerns in the thread.]

[s1gs3gv]

Well that tosser Kurt banned me for asking difficult questions and making pointed observations about the Titan quality issues, reliability problems and KNC's inability to either fix the firmware or deliver a working product on schedule. He continues to delete inconvenient posts, calls customers liars, blames the pools, argues with customers after they are banned and unable to reply, refuses to give customers any information about shipping dates and generally carries on like the pissy little twink he is.


I think we need to start a KNC 'banned with pride' subchapter of bitcointalk

[kingscrown]

anybody from EU is tryign to do something?

i want refund too but we need european lawyer/company im in EU also.

[coda]

Hi all,

My name is Henrik Ask and I represent a debt collector in Sweden called God Finans (Good Finance in english).
I just got a case from a client here in Sweden who had not got his refund on a Neptune and we helped him get his money back.

As I understand it there are more people out there that have claims on KnC Miner. Please feel free to contact me and I will be glad to help you get your money back.

You can contact me on henrik.ask@godfinans.nu

maybe him ? http://se.linkedin.com/pub/henrik-ask/37/9ab/b4b

[s1gs3gv]

Before you can successfully collect on a debt, you first need a legal judgement against KNC. This firm appears to be debt collectors, not lawyers.

At the moment, I don't think there are any outstanding legal claims.