your assumption is flawed. Here's why, and it's very simple, you don't even have to think hard about it:
If all 8 drives are in the same box, there are many correlating assumptions you can make.
1. they share the same power supply. 2. they share the same immediate environment, right down to any heatsinks or brackets physically holding them....that's two right off the bat, and from those:
If the PSU spikes or surges, each drive will receive the same surge or spike, and suffer similar damage. This can be a common failure condition that ALL your drives will suffer. Spinnies or flash, fabrication of controllers is basically the same process, and each is every bit as vulnerable to poor quality power supplies as the other. Pretty much the ONLY mitigation to this that can be applied userside is a clean isolating power supply - one that runs off a battery rather than the mains. If one drive overheats and fails, you can be damn sure that any other drives in the same thermal zone (which they generally are in most systems I've ever seen) will be suffering the same problem.
I have audio CDs (OK, pressed not burned) from 1992. They still play (just tried one to be sure: Classical Collection issue 11, Debussy - Orbis Publishing. Claire de Lune still sounds as fresh as it did twenty one years and change ago.).
I also have a burned CDR from around 1997, it's the only CDR that old I have that still reads. Generally I've found burned CDR media fails after about 5-6 years (and I am a complete sod when it comes to environmental control of my media storage), that one disc being the notable exception.
...to waste on waiting for people to finish their teleconversations, I got better fucking things to do. Like for instance, dealing with the next in line who's obviously not engaged in some inane drivel about what colour knickers Miley Bleedin' Cyrus might be wearing today and just wants to pay for his shit and go...
ok. Flip a coin: the odds of it landing on one given side is 2:1 against. Flip a coin (I'm assuming the same coin?) again. The odds of it landing on the same one given side are still 2:1 against. The variables have not changed. You don't double the odds every time you flip; the coin still only has two sides.
What you're implying by your blatant insult is if hard disk 1 has probability of failure 1/1000 and so does disk 2, then the probability of both failing is 1/1,000,000. That assumes failures are statistically independent, but they’re not. You can’t just multiply probabilities like that unless the failures are uncorrelated. Wrongly assuming independence is a common error in applying probability, particularly inside of a computer case, maybe the most common error.
When a company builds a RAID, they may grab four or five disks that came off the assembly line together. If one of these disks has a slight flaw that causes it to fail after say 10,000 hours of use, it’s likely they all do. This is not just a theoretical possibility. Companies have observed batches of disks all failing around the same time.
Using disks made by competing companies would significantly decrease the correlation in failure probabilities. The failures will always be somewhat correlated. For one thing, different manufacturers use similar materials and processes. Also, regardless of where the drives come from, they end up in the same box, all subject to the same environmental factors. If one drive fails due to overheating, then the same failure condition will likely affect other drives *in the same box*.
To bring it to a real-world level, something you *might* grasp: the odds against winning the Lottery jackpot in Britain is 14,000,000:1 (roughly). If you bought 14 million tickets to cover every possible outcome, your odds of having ONE winning ticket are STILL 14,000,000:1 against. This is also not a theoretical possibility, it is mathematical certainty.
Notepad for text. OpenOffice for markup & publishing.
Since I do write a lot of legal stuff (I thought I'd packed that racket in, but no, it won't let me...), I want/need something that loads in 0 seconds or close as dammit, doesn't have ANY bells and whistles to distract me, that can keep up with my typing speed (even OOo has problems sometimes, what with the app competing for CPU cycles with everything else, most importantly the keyboard buffer!), occasionally (particularly during meetings) I'll kick up a DOS session and use EDIT.
I have had several laptops from Dell, they all still work even after (for the oldest one) nearly ten years. Why?
Three words: Platinum Extended Warranty.
OK, they might be picture frames now until they EOL themselves (I have no plans to further extend warranties on any of them), but up to yet I've NEVER had to pay for a single replacement part. I've had replacement panels, replacement optical drives, replacement keyboards, replacement trackpads, replacement hard drvies, even had a battery replaced gratis after an aftermarket Sony (supplied by Dell as an optional extra because I needed the extra capacity) almost immediately went tits up.
I'm on a Toshiba now as my main laptop, it gets treated like a custom desktop. It's half a year out of warranty, but I've had no issues with it at all.
...trademarks. Mario is still a trademark of Nintendo, he's still a live character, Nintendo are still making games with him in them.
Did Nintendo go apeshit over Super Tux Kart? No, because the player character is a penguin and not a plumber - but anyone who's played both will tell you that Super Tux Kart and Mariokart are, apart from the sprites, practically identical.
I've got two telescopes, but I need neither to see the Pleiades, the Orion Nebula, and the Andromeda Galaxy, all from the middle of Nottingham. I never actually truly appreciated the night sky until last November when I was in Darkest Herefordshire and with the Manor grounds at Bodenham in complete darkness and the nearest village 12 miles away, the sky took on a whole new level of stunning.
Please, people, STOP recommending Tor! Here's a bit of forgotten history: Silk Road operated on the Tor network, it was TRACED then TAKEN DOWN by the Met's National Crime Agency.
BZZT! Try again, he has parental *responsibility*, not parental *rights*. Parental *rights* for both mother and father are in practical terms, abolished under CA1989.
you've obviously never sat in on a divorce or DV case... this is a common question and it pretty much never gets pulled when asked, though it should be every single time because in those situations any way you answer it incriminates you.
yeah, what is it in KSP to make a ten degree inclination change at 100km Kerbin orbit?? Something like 200m/s? That's around a planet 600km in diameter. Even that would blow a MMU's capabilities (80m/s). It's something that requires a main engine burn. Something a Shuttle just won't have the fuel for - launch windows are precisely that, timing windows for the STS to catch up with the satellite (or vice versa, depending on your relative viewpoint) *during launch and orbital insertion*, and you can have anything from one to 96 orbits between launch windows. Something we KSP geeks know a little something about...
depends on a lot of things, not least of which: the location of the thruster relative to the centre of mass, the total mass of the MMU and the person controlling it, exhaust velocity, reaction type (oxidiser reaction, gas jet, nuclear pulse, ion thrust...). Usually with MMUs you're looking at a high density monopropellant such as compressed nitrogen gas, which leaves a relatively pitiful delta-v rating of something like 80 feet per second. Or, in real terms, about six hours of EVA. So while you're not exactly breaking for higher orbit or going for translunar injection (cf. Holmann Transfer), it'll get you around any other mass in the same orbit with relative ease.
according to warp theory, and I forget where I read this, a vessel exiting warp carries the same inertia it had when it entered. Ergo, travelling at 17,000mph relative to the star orbiting around an inner planet, warping to an outer planet it will still be travelling at 17,000mph in the same direction as it was pointing when it entered warp, which if it means it's pointing at the outer planet when it exits could get very messy since the further out your orbit, the slower your orbital velocity. A warp bubble is like a surfboard: you use it to ride a subspace surf, but your inertia carries at the same velocity the whole time, so if you're drifting left at 10,000mph and suddenly warp forward, you're still drifting left the entire time you're in warp, only you don't notice it since you're only doing 10,000mph left and a relatively huge 186,000 miles per second forward. If you want to exit at a relative stop to your destination, you have to match velocities *before* you do your warp jump. Again this could get messy, as your "destination relative stop" could equal "local ludicrous" or "local completely hazardous" speed.
Which could also explain why I've seen references to the dangers of jumping to Warp while still within the Solar System (think Star Trek: The Motion Picture), it's not so much the gravity well problem, it's the setting up for a "destination relative stop" exit.
Clerks was one of the best movies ever made. No impossible science in it, no CGI to cover up the awful set design decisions (no, what they did was use a plot device to cover up the fact that they shot the internal scenes in a real shop, at night while the shop was closed for business, and had to explain away the fact that the shutters were down - some cunt had superglued the locks (clever!)) no humungous explosion to distract from the awful plot, actually it was a decent plot, no political correct bullshit mumbling to cover the fact that Jay was about to shout "NIGGER!" in public or whip his cock out, it was just straight-up honest film making. I don't care whether you're drunk, high, spaced, strung or stone cold sober, go watch Clerks, it'll change your world.
it strikes me as a robber putting a gun to your head and demanding money, then saying "If you don't give me money I'll blow your brains out and take it anyway, then go after your family for the cost of the bullet."
Slashdot Mirror
your assumption is flawed. Here's why, and it's very simple, you don't even have to think hard about it:
If all 8 drives are in the same box, there are many correlating assumptions you can make.
1. they share the same power supply. ...that's two right off the bat, and from those:
2. they share the same immediate environment, right down to any heatsinks or brackets physically holding them.
If the PSU spikes or surges, each drive will receive the same surge or spike, and suffer similar damage. This can be a common failure condition that ALL your drives will suffer. Spinnies or flash, fabrication of controllers is basically the same process, and each is every bit as vulnerable to poor quality power supplies as the other. Pretty much the ONLY mitigation to this that can be applied userside is a clean isolating power supply - one that runs off a battery rather than the mains.
If one drive overheats and fails, you can be damn sure that any other drives in the same thermal zone (which they generally are in most systems I've ever seen) will be suffering the same problem.
throwing in an anecdote...
I have audio CDs (OK, pressed not burned) from 1992. They still play (just tried one to be sure: Classical Collection issue 11, Debussy - Orbis Publishing. Claire de Lune still sounds as fresh as it did twenty one years and change ago.).
I also have a burned CDR from around 1997, it's the only CDR that old I have that still reads. Generally I've found burned CDR media fails after about 5-6 years (and I am a complete sod when it comes to environmental control of my media storage), that one disc being the notable exception.
...to waste on waiting for people to finish their teleconversations, I got better fucking things to do. Like for instance, dealing with the next in line who's obviously not engaged in some inane drivel about what colour knickers Miley Bleedin' Cyrus might be wearing today and just wants to pay for his shit and go...
ok. Flip a coin: the odds of it landing on one given side is 2:1 against. Flip a coin (I'm assuming the same coin?) again. The odds of it landing on the same one given side are still 2:1 against. The variables have not changed. You don't double the odds every time you flip; the coin still only has two sides.
Are you?
What you're implying by your blatant insult is if hard disk 1 has probability of failure 1/1000 and so does disk 2, then the probability of both failing is 1/1,000,000. That assumes failures are statistically independent, but they’re not. You can’t just multiply probabilities like that unless the failures are uncorrelated. Wrongly assuming independence is a common error in applying probability, particularly inside of a computer case, maybe the most common error.
When a company builds a RAID, they may grab four or five disks that came off the assembly line together. If one of these disks has a slight flaw that causes it to fail after say 10,000 hours of use, it’s likely they all do. This is not just a theoretical possibility. Companies have observed batches of disks all failing around the same time.
Using disks made by competing companies would significantly decrease the correlation in failure probabilities. The failures will always be somewhat correlated. For one thing, different manufacturers use similar materials and processes. Also, regardless of where the drives come from, they end up in the same box, all subject to the same environmental factors. If one drive fails due to overheating, then the same failure condition will likely affect other drives *in the same box*.
To bring it to a real-world level, something you *might* grasp: the odds against winning the Lottery jackpot in Britain is 14,000,000:1 (roughly). If you bought 14 million tickets to cover every possible outcome, your odds of having ONE winning ticket are STILL 14,000,000:1 against. This is also not a theoretical possibility, it is mathematical certainty.
The Chinese have been using Busybox for years. I still have two routers that use Busybox - the Swiss Army Knife of embedded Linux.
linky.
Notepad for text.
OpenOffice for markup & publishing.
Since I do write a lot of legal stuff (I thought I'd packed that racket in, but no, it won't let me...), I want/need something that loads in 0 seconds or close as dammit, doesn't have ANY bells and whistles to distract me, that can keep up with my typing speed (even OOo has problems sometimes, what with the app competing for CPU cycles with everything else, most importantly the keyboard buffer!), occasionally (particularly during meetings) I'll kick up a DOS session and use EDIT.
I have had several laptops from Dell, they all still work even after (for the oldest one) nearly ten years. Why?
Three words: Platinum Extended Warranty.
OK, they might be picture frames now until they EOL themselves (I have no plans to further extend warranties on any of them), but up to yet I've NEVER had to pay for a single replacement part. I've had replacement panels, replacement optical drives, replacement keyboards, replacement trackpads, replacement hard drvies, even had a battery replaced gratis after an aftermarket Sony (supplied by Dell as an optional extra because I needed the extra capacity) almost immediately went tits up.
I'm on a Toshiba now as my main laptop, it gets treated like a custom desktop. It's half a year out of warranty, but I've had no issues with it at all.
actually, if the odds are 2:1 of a drive failing, the odds of all 16 failing are still 2:1.
...on whether there is legitimate cause to believe that a specific group or individual is planning on weaponising this shit...
...trademarks. Mario is still a trademark of Nintendo, he's still a live character, Nintendo are still making games with him in them.
Did Nintendo go apeshit over Super Tux Kart? No, because the player character is a penguin and not a plumber - but anyone who's played both will tell you that Super Tux Kart and Mariokart are, apart from the sprites, practically identical.
I've got two telescopes, but I need neither to see the Pleiades, the Orion Nebula, and the Andromeda Galaxy, all from the middle of Nottingham. I never actually truly appreciated the night sky until last November when I was in Darkest Herefordshire and with the Manor grounds at Bodenham in complete darkness and the nearest village 12 miles away, the sky took on a whole new level of stunning.
No immediate plans to go back to Bodenham, but if/when I do I hope it's during late autumn/winter months again so I can take my telescope this time round. Maybe get some images that plant Jupiter & Taurus, wide field, in Nottingham and Jupiter & Taurus with M42, stacked exposure, in Nottingham, and finally single, tracked exposure of Orion taken with a £50 digital camera and motorised piggyback mount in a private observatory in Herefordshire six feet under.
that's my new desktop. Gorgeous.
that's what I thought!
Please, people, STOP recommending Tor! Here's a bit of forgotten history: Silk Road operated on the Tor network, it was TRACED then TAKEN DOWN by the Met's National Crime Agency.
A primer on the NCA.
Also, please bear in mind that the Tor protocol was developed by the US NAVY. If you do decide to use Tor consider it INSECURE.
you might not agree with everything he says, but he has every right to say it just as you have every right to change the fucking channel.
BZZT! Try again, he has parental *responsibility*, not parental *rights*. Parental *rights* for both mother and father are in practical terms, abolished under CA1989.
Yavin?
Come on, we were all thinking it.
you've obviously never sat in on a divorce or DV case... this is a common question and it pretty much never gets pulled when asked, though it should be every single time because in those situations any way you answer it incriminates you.
"I know this... it's UNIX!"
Jurassic Park cost me a television.
fuckers.
yeah, what is it in KSP to make a ten degree inclination change at 100km Kerbin orbit?? Something like 200m/s? That's around a planet 600km in diameter. Even that would blow a MMU's capabilities (80m/s). It's something that requires a main engine burn. Something a Shuttle just won't have the fuel for - launch windows are precisely that, timing windows for the STS to catch up with the satellite (or vice versa, depending on your relative viewpoint) *during launch and orbital insertion*, and you can have anything from one to 96 orbits between launch windows. Something we KSP geeks know a little something about...
depends on a lot of things, not least of which: the location of the thruster relative to the centre of mass, the total mass of the MMU and the person controlling it, exhaust velocity, reaction type (oxidiser reaction, gas jet, nuclear pulse, ion thrust...). Usually with MMUs you're looking at a high density monopropellant such as compressed nitrogen gas, which leaves a relatively pitiful delta-v rating of something like 80 feet per second. Or, in real terms, about six hours of EVA. So while you're not exactly breaking for higher orbit or going for translunar injection (cf. Holmann Transfer), it'll get you around any other mass in the same orbit with relative ease.
two plot devices:
Gravitational plating. Well established canon plot device.
Inertial dampers. Also well established plot device, so much so in fact that it's been ripped off many, many times.
according to warp theory, and I forget where I read this, a vessel exiting warp carries the same inertia it had when it entered. Ergo, travelling at 17,000mph relative to the star orbiting around an inner planet, warping to an outer planet it will still be travelling at 17,000mph in the same direction as it was pointing when it entered warp, which if it means it's pointing at the outer planet when it exits could get very messy since the further out your orbit, the slower your orbital velocity. A warp bubble is like a surfboard: you use it to ride a subspace surf, but your inertia carries at the same velocity the whole time, so if you're drifting left at 10,000mph and suddenly warp forward, you're still drifting left the entire time you're in warp, only you don't notice it since you're only doing 10,000mph left and a relatively huge 186,000 miles per second forward. If you want to exit at a relative stop to your destination, you have to match velocities *before* you do your warp jump. Again this could get messy, as your "destination relative stop" could equal "local ludicrous" or "local completely hazardous" speed.
Which could also explain why I've seen references to the dangers of jumping to Warp while still within the Solar System (think Star Trek: The Motion Picture), it's not so much the gravity well problem, it's the setting up for a "destination relative stop" exit.
Clerks was one of the best movies ever made. No impossible science in it, no CGI to cover up the awful set design decisions (no, what they did was use a plot device to cover up the fact that they shot the internal scenes in a real shop, at night while the shop was closed for business, and had to explain away the fact that the shutters were down - some cunt had superglued the locks (clever!)) no humungous explosion to distract from the awful plot, actually it was a decent plot, no political correct bullshit mumbling to cover the fact that Jay was about to shout "NIGGER!" in public or whip his cock out, it was just straight-up honest film making. I don't care whether you're drunk, high, spaced, strung or stone cold sober, go watch Clerks, it'll change your world.
it strikes me as a robber putting a gun to your head and demanding money, then saying "If you don't give me money I'll blow your brains out and take it anyway, then go after your family for the cost of the bullet."