There is another failure rate that you have to take into account: unrecoverable bit-read error-rate. This is detected as an error in the upstream connection, which can cause the controller to fail the drive. An unrecoverable read fails the ECC mechanism and can under circumstances be recovered by performing a re-read of the sector.
The error-rate is in the order of 10^14 bits. Calculating this on a busy system, reading 1MBytes/s gives you approx. 10^7 seconds for each unrecoverable read failure. Or, that means it occurs 3 times per year on average. So, forget MTBF on busy systems and hope that your controller is able to do re-reads on a disk. Otherwise, your busy system/array is not going to last very long.
You must give them some slack for being optimistic. Sitting with a sour face does not help the bottom line, does it. Then again, a sophisticated/buyer/ is merely a consumer that has had its brain turned off by advertising spin.
Multiple cores plus less experienced programmers results multiple infinite loops able to run at the same time. I don't quite see how this helps quality software, regardless of the synchronization problem.
Sure you have nothing to hide. You submitted a DNA sample of your neighbor and passed it along as your own. Instead of you have nothing to hide, you are non-existent. A nice prospect to keep below the radar.
...wants the ISP to start filtering traffic to scrub all illicitly uploaded and downloaded copyrighted material on its network.
So, basically, nearly all traffic traversing the ISP must be blocked because most is covered by copyright. Also most webcontent falls in the same category. What a prospect.
There are both surplus production being sold on the black market and there is counterfeit stuff. I have handled a batch GBICs which were in original wrapping, but on closer inspection they all had the same serial number (not on the sticker, but read using snmp). So they are probably surplus. However, another batch was clearly counterfeit as they didn't properly fit the slots.
That just means that you need to have a large TCP window to compensate the large bandwidth-delay product. No real problem. The connection sucks for anything interactive, but bulk is just fine.
Threatening is one thing. But, are they going to push an excess number of electrons in my direction at an elevated pace for the act of killing? Or do they simply mail-order me a bullet for self-inflicting a lethal wound? I fail to see the impact of the threat.
Re:So when do we get its successor?
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· Score: 2, Insightful
Can you provide some code? You are free to make a new graphics interface. X has been around for a long time and it will stay for a long time yet. It has proven itself despite of its shortcomings. I don't think that a complete replacement is a good idea. The best thing for X that yet has to happen is it running as an unpriveledged user, but that is hard with the hardware so close to the software.
Sorry to be a cynic, but learning these things in classes does not make you an embedded developer. It is the experience in a variety of fields that makes an embedded programmer. For what it is worth, experience in the variety makes you a programmer for nearly all fields. Let me give you a simple example; programming an interrupt service routine is probably one of the most difficult things to do the Right Way(TM). When things get smaller, it gets harder. That is where the experience kicks in and you "see" how things are supposed to work and how they hook together (and you finally know how to read data-sheets correctly). It takes years to learn this.
On the other hand, you have a good chance of getting the hang of it if you practice a lot, whereas the java-code-type-slaves probably never will understand the whole concept of a real embedded system (or what a stable program is in the first place).
Tele2 doesn't give a rats ass for its customers. They recently "upgraded" many customers to higher bandwidth because they are under pressure for competition, but they made a mistake that cause a large userbase to be downgraded instead. Tele2's support admitted the mistake and admitted that they _did_not_ actively went out to fix this. Each and every customer has to detect their degraded line themselves and then call support (and then wait 5 days until it is fixed). Tele2 has recently been bought and I do not give them very long anymore with their absolutely sub-standard service.
The biggest problem of any fiber over a distance is not amplitude (or attenuation), but the washout of the pulses because the fiber has a finite width. After a while, you still have a measurable amplitude, but one which has become a constant "on" light and no data modulation to see anymore. The thickness of the fiber is an important measure of how long you can make it without signal loss (think single-mode at 9 microns vs multi-mode at 50..75 microns). A one millimeter fiber will never carry data at gigaspeed over very long distances, regardless of material.
6. can have the movie paused while vital actions like natural functions or a trip to the fridge is performed
Please get your priorities straight; "vital actions" implies, as first item on the list, "a trip to the fridge". Natural functions should always be considered secondary.
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They are all terrorists, I tell you. Watch out for your neighbor. They /could/ be doing something that should make you paranoid.
There is another failure rate that you have to take into account: unrecoverable bit-read error-rate. This is detected as an error in the upstream connection, which can cause the controller to fail the drive. An unrecoverable read fails the ECC mechanism and can under circumstances be recovered by performing a re-read of the sector.
The error-rate is in the order of 10^14 bits. Calculating this on a busy system, reading 1MBytes/s gives you approx. 10^7 seconds for each unrecoverable read failure. Or, that means it occurs 3 times per year on average. So, forget MTBF on busy systems and hope that your controller is able to do re-reads on a disk. Otherwise, your busy system/array is not going to last very long.
I remember those 75G IBM drives. Had an array of them, totaling 16 drives, 14 of them failed within 12 months.
Real men don't make backups; they cry.
You must give them some slack for being optimistic. Sitting with a sour face does not help the bottom line, does it. Then again, a sophisticated /buyer/ is merely a consumer that has had its brain turned off by advertising spin.
Multiple cores plus less experienced programmers results multiple infinite loops able to run at the same time. I don't quite see how this helps quality software, regardless of the synchronization problem.
Sure you have nothing to hide. You submitted a DNA sample of your neighbor and passed it along as your own. Instead of you have nothing to hide, you are non-existent. A nice prospect to keep below the radar.
...wants the ISP to start filtering traffic to scrub all illicitly uploaded and downloaded copyrighted material on its network.
So, basically, nearly all traffic traversing the ISP must be blocked because most is covered by copyright. Also most webcontent falls in the same category. What a prospect.
There are both surplus production being sold on the black market and there is counterfeit stuff. I have handled a batch GBICs which were in original wrapping, but on closer inspection they all had the same serial number (not on the sticker, but read using snmp). So they are probably surplus. However, another batch was clearly counterfeit as they didn't properly fit the slots.
That just means that you need to have a large TCP window to compensate the large bandwidth-delay product. No real problem. The connection sucks for anything interactive, but bulk is just fine.
Ehm, you also have to get back down, so that is 240ms minimum...
> What ever happened to calling a duck a duck?
That is called modern euphemism of political correctness.
Use tor... Sure, it is slower, but it bypasses the ISP tracking.
Ehm, right after they have finished the accelerator and the fusion reactor in my backyard. It is a big project, but we'll get there eventually.
Threatening is one thing. But, are they going to push an excess number of electrons in my direction at an elevated pace for the act of killing? Or do they simply mail-order me a bullet for self-inflicting a lethal wound? I fail to see the impact of the threat.
Can you provide some code? You are free to make a new graphics interface. X has been around for a long time and it will stay for a long time yet. It has proven itself despite of its shortcomings. I don't think that a complete replacement is a good idea. The best thing for X that yet has to happen is it running as an unpriveledged user, but that is hard with the hardware so close to the software.
Sorry to be a cynic, but learning these things in classes does not make you an embedded developer. It is the experience in a variety of fields that makes an embedded programmer. For what it is worth, experience in the variety makes you a programmer for nearly all fields.
Let me give you a simple example; programming an interrupt service routine is probably one of the most difficult things to do the Right Way(TM). When things get smaller, it gets harder. That is where the experience kicks in and you "see" how things are supposed to work and how they hook together (and you finally know how to read data-sheets correctly). It takes years to learn this.
On the other hand, you have a good chance of getting the hang of it if you practice a lot, whereas the java-code-type-slaves probably never will understand the whole concept of a real embedded system (or what a stable program is in the first place).
The Pirate Bay already beat them to it: http://thejesperbay.org/
The name is a parody on the chairman of the IFPI...
Tele2 doesn't give a rats ass for its customers. They recently "upgraded" many customers to higher bandwidth because they are under pressure for competition, but they made a mistake that cause a large userbase to be downgraded instead. Tele2's support admitted the mistake and admitted that they _did_not_ actively went out to fix this. Each and every customer has to detect their degraded line themselves and then call support (and then wait 5 days until it is fixed). Tele2 has recently been bought and I do not give them very long anymore with their absolutely sub-standard service.
No, no, they should want a copy of the internet, every last bit of it. That should wrap up all possible angles once and for all.
ROI in about 40M years. Must be a profitable venture for your grand^(1M) -children (unless they win a Darwin award).
And the lack of corn-circles if this ever becomes mainstream.
The biggest problem of any fiber over a distance is not amplitude (or attenuation), but the washout of the pulses because the fiber has a finite width. After a while, you still have a measurable amplitude, but one which has become a constant "on" light and no data modulation to see anymore. The thickness of the fiber is an important measure of how long you can make it without signal loss (think single-mode at 9 microns vs multi-mode at 50..75 microns). A one millimeter fiber will never carry data at gigaspeed over very long distances, regardless of material.