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Comment Re:Density is nice, but what about longevity? (Score 1) 185

The ACs numbers make no sense, the length of the buffer is irrelevent, what matters is the rate at which you are writing date. 250 megabytes per second is also a crazy datarate, typical broadcast HD is more like 1 megabyte per second (8 megabits per second). Maybe a bit more if you have a cable provider who have more bandwidth than they know what to do with.

1 megabyte per second * 2 tuners = 2 megabytes per second = 7.2 gigabytes per hour ~= 170 gigabytes per day ~= 63 terrabytes per year

The shortest life drive in TFA started showing issues at 300 terrabytes and crapped out after 700 terabytes. So we are talking a probable lifetime of years.

Comment Re:Cores Schmores (Score 1) 136

The advantage for some people is that it also runs in little-endian,

Well x86 is little endian too, so that's more of a non-disadvantage than an advantage. Being big endian in a little endian world was a major disadvantage.

something I shall never understand

If you have a big codebase that has only ever been run on little endian platforms it very likely will have issues when running on big endian platforms. Rooting out and fixing these issues will often be a non trivial task. Since Intel and little endian arm are the readilly accessible platforms today a lot more code gets written with little endian assumptions than big endian ones.

Comment Re:Phone portion goes unused (Score 1) 177

Out of interest which country? Here in the UK phone service is still usually delievered over "real POTS". ADSL and VDSL (FTTC) users use filters/splitters to seperate voice and DSL. The cable company runs phone wiring alongside the cable TV wiring (and have done so since long before the days of cable modems).

FTTH services may be an exception but those are still pretty rare here.

Comment Re:Cord-Cutting: Is a Landline Needed? (Score 1) 251

I haven't had a landline in about 10 years, but I hand out my last landline phone number to anyone who asks for a phone number - let them waste time calling a dead line.

Phone numbers get reused so there is a good chance they will not be calling a dead line but instead will be calling whoever happened to be allocated that number after you stopped renting it.

Comment Re:Seems reasonable (Score 1) 173

The question is what is a reasonable metric. They have a buisness model for building out new capacity that assumes that said capacity will be in use for many years. Usually this works quite well, for commercial property it doesn't really matter who is in the builiding as long as someone is and for heavy industry once the facility is bought and paid for it's likely to keep working for years (even if it's original owner goes bankrupt).

Bitcoin mining is different, the system is rigged so for a given size of bitcoin economy mining gets less profitable over time. Furthermore to mine profitablly you have to be on the latest equipment, if you are replacing all your equipment every year or two anyway will you see much motivation to stay in one place? The utility rightly sees this as a risk. If they were a normal buisness they would just jack up their rates for the customers they considered high-risk.

But utilities are (rightly) highly regulated because normal customers can't just up-sticks and leave. So if the utility wants to deter bitcoin miners from moving in to their area (or at least charge them more to make up for the risk) they need to work with the local government to draw a line in the sand somewhere. That line needs to be drawn in a way that non-technical lawyers, judges and politicans can understand and that can be enforced using information the utility has access to.

Comment Sensible unicode support. (Score 1) 1833

IIRC slashdot tried wide open unicode and quickly turned it off again (and even broke 8859-1) when people started doing weired shit with control characters related to right to left text.

My suggestion would be a whitelist but a reasonablly open one. Let us use greek letters, accented latin letters, curvy quotes, mathemetical and technical symbols etc but forbid any blocks that have strange rendering rules (explicit control characters, RTL text, scripts with different physical verses logical order) etc.

Comment Re:British Airspace (Score 5, Informative) 198

The problem here is the term "country" is vauge. In most contexts when people say country they mean "Sovereign state" which Scotland is not (they had an independence refferendum recently but voted against independence). Yet the constituant parts of the united kingdom are reffered to as countries despite not being sovereign.

Comment Re:Why retail? (Score 1) 298

I would imagine the main reason is complexity which leads to cost though from some googling it seems poorly written regulations may be an issue in some places.

Most grid-tie systems are built to be installed just like a load would be installed, you add a breaker in your panel, wire up the panels to the inverter and the inverter to the breaker and turn things on. Depending on your locality there may also be a bit of beuracracy but it's typically fairly minimal.

A system that can go into an "intentional island" state is more complex. There now needs to be a contactor to seperate the load and inverter from the grid in the event of grid failure. The inverter control system needs to support both islanded and grid-tie modes and the process for switching between those modes needs to be carefully designed to prevent back-feeding. There is also the problem that even on a bright sunny day the peak load of a household may well be higher than the solar panels can supply. These problems can be managed but it all adds cost.

From some googling (e.g. I found ) it seems that such systems do exist but they are the exception not the rule.

Comment Re:Rubber Stamp (Score 1) 183

Domain names (without IDN) are formed from the ascii letters, numbers and hyphens. Letters were case insensitive and in practice at least in web browsers (which is where spoofing attacks were the biggest concern) were displayed to the user in lowercase.

So that leaves us with


The closest thing to a homograph pair in that set is 1 and l but still in most fonts they are visiblly distinct (the spacing is usually the biggest givaway). If we consider uppercase letters then that gives us a couple more pairs. (0 and O, l and I) which are less obviously distinct. Still for a typical name even considering uppercase letters the number of variants that would have to be registered to block Ascii homograph attacks is small.

Compare that to unicode where you have the latin greek and cryllic alphabets (among others) which have many letters that look identical but have seperate code points for each alphabet. Many different accents that can be combined arbiterally with any base character and so-on.

So in summary yes there was some possibility of spoofing attacks before IDN but it was minimal compared to the possibility with unregulated IDN.

Major web browsers have hacked arround this with ad-hoc soloutions but that isn't exactly a good basis for security.

Comment Re:The internet started with DARPA (Score 1) 183

As I understand it the "backbone of the internet" started in the USA and later grew across the pond to Europe (helped by a transatlantic fiber glut and by the relatively open state of the communications market in Europe). South america, africa and australasia are not big/powerful enough to really matter and Asia is mired in political issues.

Comment Re:Batteries? in a Nest ? (Score 1) 432

I would guess that when they started putting in central heating systems they saw little point in using a lower voltage. 240V (standard mains voltage in the UK) works fine for bimetallic strip thermostats, pumps, mechanical timers and motorised valves.

Individual components have got fancier over the years and wiring plans have got more complex but the basic system hasn't changed much.

Comment Re:Batteries? in a Nest ? (Score 1) 432

In my experiance the most common type of heating in the UK is gas-fired central heating with water used to carry the heat from the "boiler"* to the radiators. This system also heats the water, traditionally using a hot water tank though some modern systems heat the water directly (this is reffered to as a "combi boiler"). The control wiring is 240V. Theres a few different variants depending on what equipment is used but it would typically be something like

Electric heating seems to be done with self-contained heaters (often storage heaters) which have their thermostats integrated.

* Techically it doesn't boil anything but that is what everyone calls them.

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