I just realised "Norge-området". Did not see that before - I am located in Stockholm, not sure if that is a problem or not. In any case, I could go for 2 units.
Only thing I could think of is that you might have to pay VAT twice, which would probably break any chance of "getting a good deal". I am pretty sure that we would have to pay VAT if we had things shipped from Sweden to Norway, so "Buyer-beware", I guess. Look into it, and let me know.. I will put you down for 2 units provisionally. Well the thing to do is two different buys and I can ship to the two separate locations, if people don't mind a bit of a wait the goods could be shipped surface which would negate the need to ship by air. Sure it takes longer by surface, but it is still registered and a damned sight cheaper… RF |
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Yep the reason it hangs in systempref is that is where the shitty setup for modems is processed and since the BE's enumerate as serial interfaces……
Something messes up and….well you get the picture…
'ZOC' does the same with FTDI USB serial chips sometimes….
RF
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Hi,
What you may consider doing… for a test is throw that 49 board from the Raspberry pi to the OSX for an hour and compare your hash rates.
I found that the hash rates improve when I moved my miners from shitty little cutter single core SBC's, sometimes as much as 400MH/s per miner for the BE's
The issue is that on many of these SBC's the Ethernet/network is chained off the same damned USB systems.
The only thing to watch is that for some reason OSX is very fussy about the structure of the USB chain.
The devices show up, but the miner software has a hell of a job enumerating the devices.
Sometimes failing to remove devices that were removed.
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Excellent!!!!
Quite a menagerie of miners you have there…. ;-)
Hmmm… I think I can see a 49 port hub in the corner of the picture?
RF
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Received mine... Had to replace the power cord with one with a US plug, but it's running well.
I'll take some photos tomorrow... Running a RedFury, Bi*Fury, 3x Drillbit thumbs, and 4x Antminer U1's.
Great to hear that you are up and running fairly painlessly. But Please ensure the replacement plug is 3 pin. RF |
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OK, let's try a little experiment.
Suppose you're in charge of the London Underground, and you're having the slight annoyance of an occasional passenger being run over by a train.
You could:
1. play a recording saying "Mind the gap" every ten seconds or
2. put a wall with sliding doors between the platform and the train.
Which one would you choose?
Both…. same as they do in HK, because there is always some Deaf guy who cannot hear the announcements… then they have people standing by the walls to stop the mainlanders trying to force the doors open, and Security for the people like (gox) who flatly refuse to follow the rules |
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Also Guys,
There is no reason you cannot power you PI of these, I suspect the PI allows power via the USB connectors.
Just don't try and run any heavy graphic simulations that pull too much power as the re-settable fuses may cut in. (FIXED!!! Mar-2014)
RF
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For damaged hubs
I can offer a repair service.
Please PM for details.
RF
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Do you have a good USB fan you recommend that could be used instead?? ***Important tip***
DO NOT use Swan necked fans directly into USB ports.
The Swan Neck will Destroy the sockets, this applies to any USB socket
Razorfishsl
Basically any fan that does not use the Socket for support, or 'Jerry rig' the arctics with an extension cable. I'm seeing a 'change in the USB power contact resistance' over time with the swan neck fans.(all sockets I have tested) *in English* The vibration from the fan travels down the swan neck and causes the contact between the fan and the USB socket to arc slightly, thereby increasing the resistance and causing 'self heating' of the socket, which in turn causes the contacts to break loose of the integral plastic assembly in the sockets. RF |
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***Important tip***
DO NOT use Swan necked fans directly into USB ports.
The Swan Neck will Destroy the sockets, this applies to any USB socket
Razorfishsl
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Received the hub today: really nice piece of equipment. And I can confirm that it's compatible with Raspberry Pi. I posted the first part of my review in the hubs thread here. *Important tip DO NOT use Swan necked fans directly into USB ports. The Swan Neck will Destroy the sockets. Razorfishsl |
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Here is a list of countries that have been confirmed as having completely and utterly and without any qualification banned all use of bitcoin:
1. China
2. Russia
This has not been confirmed by multiple confirmed and verified sources, most importantly in non-English language encrypted letters and words. Therefore, we know this is fact. Total bans.
Clearly there is a trend developing that we can calculate. By 2015 every country of our Earth will have banned the use of bitcoin. That is why we know bitcoin will fail, as has been confirmed. Truly, it is only going to get worse from here.
We have already seen the market begin its total collapse as it continues to fail to make new all time highs and crashes on a daily basis. While I know bitcoin will fail, as has been confirmed, I still can't help but feel such despair in my heart. It was a nice idea, but it simply cannot succeed.
If you don't sell all your bitcoins now, you will be gloriously sad, as many of us have confirmed. Confirm if you agree!
Seriously you are so full of shit…. I remember the start of this thread where you gave a 'genuine' link to an article that China was going to 'destroy' bitcoin. That 'link' turned out to be an article, that was instructing people to BE AWARE that CHINESE NEW YEAR was coming and to arrange their banking so that they were not left without funds. You appear to be so fucking stupid as to not understand that : 1. Many people read Chinese.(several billion I think…..) 2. Google has a translation function. 3. The China government hunts down and does a 'David Copperfield' on any China citizens spreading lies/rumors about government policy. RF you are arguing with somebody that has significant qualifications in his fields of study, who with only the highest academic standards uses knowledge and facts together with valid logic to come to 100% confirmations. We should all be thankful for the advice given to us. The link given in the first post: My latest find comes, of course, from official sources in China and details how the Chinese government is planning a massive 99% attack on the blockchain. I'll put the main points below, but anyone can check the facts from the source:
1. Chinese offials delcare bitcoin a global financial virus
2. Officials from other nations are in agreement with china China, including the US
3. The Chinese government has millions of petahashes ready to deploy on the blockchain to destroy the protocol
4. In addition to attacking the blockchian, China will sell all their mined bitcoins on MtGox
It's obvious bitcoin has gone as far as it can go, but any other thoughts about this devastating news?
http://www.pbc.gov.cn/publish/zhifujiesuansi/1066/2014/20140106171553005433546/20140106171553005433546_.htmlRelated to the 'destruction of bitcoin' And now the 100% confirmed translation of the 4 points above….(which 'I'll put the main points below, but anyone can check the facts from the source') The source…. China PBOC Shanghai headquarters, branches, business management department , the provincial capital ( capital) city center Branch , Shenzhen Central Sub-branch ; national development banks, policy banks, state-owned commercial banks, joint-stock commercial banks, China Postal Savings Bank ; China Foreign Exchange trading Center , central Depository Clearing Company Limited , China UnionPay Co., Ltd., the inter-bank market Clearing Corporation , clearing center city commercial bank funds :
Now in 2014 the People's Bank payment and settlement system operation and maintenance notice of the matter as follows :
First, for the good operation of payment and settlement systems and institutions involved in the maintenance of front-end , with good promotion of second-generation payment system and central bank data centralized accounting system , payment and settlement system in 2014 will total 13 maintenance window opens , respectively, on January 18 , February 15 , February 22 , March 22 , April 26 , May 24 , June 28 , July 26 , August 23 , September 20, October 25 , November 22 , beginning at 00:00 on December 13 , 8:00 before the end . During the maintenance window opens , micro-payment systems, online payment interbank clearing system and the national check image exchange system to stop receiving business.
Second, during the 2014 Spring Festival arrange payment and settlement system outage 1, specific time: at 16:00 on January 30 to at 18:30 on February 2 , suspended running micro-payment systems, online payment interbank check clearing system and the national image exchange system ; at 20:00 on January 30 at 20:00 on February 2 to suspend the operation of the electronic commercial draft system .
Third, please arrange banking financial institutions whereby each system operation and maintenance plan in advance to inform customers and make relevant explanation.
Please People's Bank branches will be forwarded to the notice within the jurisdiction of the payment and settlement system of each participant and to urge them to make proper arrangements for payment and settlement systems and related maintenance windows open during business processing outage .
Payment and settlement system maintenance outage windows open and the implementation of case problems , please contact with the total liquidation of the People's Bank Center , Tel :400 -920-0988 .
General Office of the People's Bank of China
I don't EVEN SEE 'Bitcoin' mentioned…….. I just hope his formidable Qualifications outweigh his piss poor research and citation skills…… |
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Coinbase was showing $737. I refreshed 10 mins later and it's up to $759!  bulltraps chinese have several days left, they have until the 31st to withdraw jan 28, 29, 30 and 31 4 days left to trade, friday the 31st will be the last day they will have to dump because that's also when the weekend starts the ''pump'' we saw last weekend is/was the last real pump (from 18.5 to 22.5) I think ltc will go to $8 Please don't talk shit…. That would not give them time to withdraw the funds to be useful…. Since the banks would be closed |
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Here is a list of countries that have been confirmed as having completely and utterly and without any qualification banned all use of bitcoin:
1. China
2. Russia
This has not been confirmed by multiple confirmed and verified sources, most importantly in non-English language encrypted letters and words. Therefore, we know this is fact. Total bans.
Clearly there is a trend developing that we can calculate. By 2015 every country of our Earth will have banned the use of bitcoin. That is why we know bitcoin will fail, as has been confirmed. Truly, it is only going to get worse from here.
We have already seen the market begin its total collapse as it continues to fail to make new all time highs and crashes on a daily basis. While I know bitcoin will fail, as has been confirmed, I still can't help but feel such despair in my heart. It was a nice idea, but it simply cannot succeed.
If you don't sell all your bitcoins now, you will be gloriously sad, as many of us have confirmed. Confirm if you agree!
Seriously you are so full of shit…. I remember the start of this thread where you gave a 'genuine' link to an article that China was going to 'destroy' bitcoin. That 'link' turned out to be an article, that was instructing people to BE AWARE that CHINESE NEW YEAR was coming and to arrange their banking so that they were not left without funds. You appear to be so fucking stupid as to not understand that : 1. Many people read Chinese.(several billion I think…..) 2. Google has a translation function. 3. The China government hunts down and does a 'David Copperfield' on any China citizens spreading lies/rumors about government policy. RF |
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Yes….
I know the issue is the shipping and the price.
I can work on the shipping by using surface delivery, and possibly switching steel to aluminum, but metal tooling is not cheap…
But I don't even think there would be enough interest in a kickstarter.
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The issue is they are exporting this crap……… Final happy post for today Why you should not buy cheap shitty hubs with phone charger PSU from China…  Here we see a good 73 VAC between the usb connector & the metal body of my computer…. These make ideal 'inheritance' gift sets.. and also account for WHY you should not answer your phone whilst it is charging and then go in the refrigerator or lean on a radiator… Incidentally these are in contravention LVD regulations for Europe, shame so many 'big brands' actually import this crap…. Unfortunately many of the Testhouse engineers are too inexperienced to understand this… and usually fail to correctly identify it on the testing reports. So next time you touch your computer and 'feel' something…(yes yes Calm down) it may not be static…… Rf |
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Don't get me wrong…
It is possible to get a 49 port 'hub tree' or even greater…. but not like that.
I have a very nice design for a 20,40,60,80 but the problem is the cost, to get decent manufacturing prices I would have to run 500-1,000 pcs
(yep I could EASILY manufacture myself… but end up contaminating my residence with Lead/antinomy/mercury compounds)(queue red neck with toaster oven)
Just how many customers would I have…?
No one in their right mind is going to be using USB sticks for that sort of mine setup, which would basically leave setups for manufacturing.
Yesterday I was watching CCTVn ,
which is like a China undercover reporting… Shock HORROR… they found government approved Plastic water pipe manufacturers using Medical waste and contaminated plastics for municipal water supply pipe…
Y…A….W….N… they do EXACTLY the same with all the food products they manufacture for the Export market… toasters,water kettles, clip together food containers (which incidentally is WHY I NEVER buy such products.. all my shit is glass or stainless)
Unfortunately what most people what these days is the cheapest shit possible, even if they have to buy and replace it 10 times….
If there is such a curse as reincarnation, I want to come back as the dumbest banjo strumming MOFO on the planet, because Ignorance truly is bliss.
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Yep that bitch is 20A clear……. and that's the constant current it can provide at 5v1
There is even room to slap in different PSU, but there is no need…
And yep I know they are not cheap…. if I could find a way to sell this stuff at $50USD there would be a massive market, that said , how many USB 2.0 hubs have we bought over the years… I have a massive box of them I use for spares….
I have a couple of other USB hub products in Metal cases I evaluated, but they fall down on the PSU, and by the time I costed a new case and integral PSU … they come out at about the same cost.
Since the Fury chips are highly dependent on the onboard regulators, the closer you can get to 5.X at the socket, the cleaner the regulation at the chip…
Once the supply at the socket comes down to 4.7-4.8 then the regulation goes on the buck convertor feeding the Fury.
Seriously….. next time they used a buck convertor, they should have targeted one that could go as low 3-4v for it's supply rail…, very few devices give 5v at the USB socket…
This is why the 49 port hubs are dodgy…. you have the potential for 40-50A of current slopping around the tracks, ping ponging about at MH bit rates…..
god only knows what all that inductance looks like on a double sided pcb…..
Plus the other issue is the 'sense wire' is too far away from the farthest USB connector when using the ATX PSU @5v
Weeeeeeeeee……
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How many logical hubs is it?
(For example, a typical 7-port hub is two logical four-port hubs, with hub #2 "plugged" into a port of hub #1, leaving seven open ports for the user.)
Reason I'm asking is, the Raspberry Pi can have issues with this hub if there are too many logical hubs inside it.
I think they are three logical seven-port hubs. So each hub used counts as 21 usb ports with 19 usuable. Razorfish correct me if i am wrong here! The hub is 19 external USB ports , 3 are level 1, 16 are level 2… that is all we need to care about… for expansion hubs plug the shit into the side. This is something I have been HARPING on for over a YEAR on the forums and WHY the Pi is NFG for large installations. Most of these shitty little 'cutter' SBC's have major problems with the USB… then add into this equation SHITTY hubs. Nearly everyone knows about the 126 USB device limit per Physical controller, but what is not often discussed it the level limitation. 'Theoretically' a usb chain can be nested to upto 5 levels. I.E Controller+Hub+hub+hub+hub. Now here is the rub… inside the silicon of the SBC or sometimes on the PCB is a hub chip (NOT for users)…, because these SBC devices CHAIN the ethernet/bluetooth or other I/O internally off the USB protocol, just the manufacturers don't tell you directly…. So what they do is 'hide' as many as TWO logical USB hubs INSIDE the SBC (Huba Huba), BUT then Chain them off each other and into a SINGLE silicon port……, The reason why they hide two, is because as soon a you plug a slow device into a chain then the WHOLE chain is that speed(new smarter hub chips can act as translators without destroying the speed of the whole chain as long as there is a clear path at 480Mb/s). The net effect of this SBC hand job is that straightway the 5 levels become 3 or less!!!, which is basically enough for 1 extra 10 port hub (because 1 chip HAS to be chained off another one and hence the problems with the PI, if you are lucky you plug the other hubs into the FIRST chip in the chain then you get a second level, if not they get plugged into the second chip and go out of range) Coming back to the metal hub: if you use the 3 side connectors, then it is one level , if you use the top, then it is basically 2 levels apart from 2 top ports where it is 1.(work it out!! ) So… if you buy 4 metal hubs you plug your computer into one of the hubs via the 'B' type connector and then you plug the other THREE hubs into the side connectors of that ONE hub, UNLESS your computer has more than 1 port, in which case you use ALL the connectors on the computer first. DO NOT build up a single chain of 1:1:1:1 and think it is cooler and faster, because it is not. USB is a TREE structure and no tree has all the branches on a single limb (consider the controller as the TRUNK, notice how mother nature has ALL this 'effective distribution' shit already worked out!!!). These metal hubs I PERSONALLY have had a full device chain of nearly 126 devices, the miner count reached ~104 devices, the rest was hub chips……… But NOTE, the miner performance is less with an SBC than a 'real computer', I suspect it is due to kernel task switching. Next up…….. Realtek, yep you see they make all sorts of USB silicon…. In fact they developed a shit load of silicon when USB 1.0 came out, and since silicon development is expensive, when USB 2.0 came out they took a silicon 'wrapper' that runs USB2.0, but then the internal cores of their chips are USB 1.0…., their chips are mostly used in cheap crap hubs from China. BUT they all advertise the products as USB 2.0 compatible with 1.0, because the silicon wrapper is good to USB2.0 standard (which Is compatible with 1.0) ,but the actual internal core silicon communicates at 12mb/s or SLOWER!!!. Same with their Ethernet to USB chips, the whole core runs at USB1.0, which is ironic because the Ethernet is '100/10 compatible' but it is bottlenecked because it is running at USB1.0 speeds internally!!!! (bit like some old lady driving her battery powered trike in a 45MPH zone, because it is 'road worthy' but holding up all the traffic behind her) Needless to say Microsoft was involved in this….. |
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That is great to know. Is it metal or a plastic case? It looks fairly rugged. This is a SOLID STEEL construction, cam shell, Internally the USB PCB is mounted on a steel back plane,via steel/brass bushings spaced so they take the force from any USB items being plugged in. This backplane is then screwed into outer case, the Switched mode PSU is mounted under that, again bolted to the outer case. More importantly the parts are replaceable, I.E you can swap out the power supply or even the USB PCB, so if you blow the ass out of the power supply (lightning strike?), you can just swap it out. Also the USB tree is structured in such a way as to MINIMIZE the number of levels… (127 is NOT the ONLY limitation per USB HOST controller) Many people think that building a usb hub is 'easy' you just get a PCB and some USB chips and stick them together….. Yep that works fine for basic setups 1 computer 1 hub… but the real design thought comes in when…… you take two identical hubs and chain them together….. Badly designed and you can end up with 'mis nested' hubs. (signals travel ~ 3 inches per ns unless it is silicon then it is WAY slower…) There is a REASON this hub has the 3 side ports……, they are not just basic USB ports. RF |
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