Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
Trust the World's Fastest VPN with Your Internet Security & Freedom - A Lifetime Subscription of PureVPN at 88% off. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. ×

Comment Re:@Intel: Why no ECC for consumer-grade processor (Score 1) 168

You hit a LSB and something is off by one. You hit a MSB and you're potentially off by trillions.

That's a good argument for Gray code.

I have to take issue with the assumption that nothing clears errors better than a hard reset. There are very many known strategies for dealing with errors on a running system, and a reset only clears persistent and cumulative error, rather than transient ones. Since we can assume that your computer doesn't keep the same data in memory all of the time, most will be transient.

Comment Re:ECC (Score 1) 168

The situation for AMSAT is still pretty bad, as far as I've heard. As a radio amateur group (and one that has launched quite a few satellites as space hitch-hikers) they can't afford the good stuff, but they get some donated by NASA and some of the commercial satellite companies. Only a few years ago they were still using the 1802 as their main vehicle controller, as that was their main choice in silicon-on-sapphire CPUs. They get some donations of space-qualified solar cells. They scrub their memory continuously, They use no boot ROMS. The program is loaded entirely by hardware, and then the CPU is started.

Comment Re:ECC (Score 1) 168

Your ECC RAM won't matter much if the cosmic ray hits the CPU registers. Or a cell in a block of your flash storage.

Also, your ECC RAM won't matter much if you get run over by a truck. So what? ECC RAM will help if there is a bitflip in your ECC RAM, that's what it's for and that's what the benefit is. It's not going to solve world hunger either, and nobody ever suggested that it would.

Comment Re: Ways around this (Score 1) 432

The next step would be to deny entry for people with wiped phones.

Perhaps -- and then the countermeasure would be to modify the procedure so that instead of placing a recognizably "vanilla" OS on your phone, it would replace your OS with an image that contains only some of your favorite innocuous data and apps that you don't mind Customs poking around in.

And the cat-and-mouse game continues...

Comment Re: "Of course it can," says government (Score 1) 168

The comment I was responding to was regarding HAARP. And that's "except" FYI. :-) ECC is actually more reliable, for its problem domain, than a triple voting system. The probability that you would arrive at a valid ECC code for bad data due to multiple bit flips is much lower than than the probability of two out of three systems voting wrong. So, it is at least theoretically possible to design a computer system with data integrity throughout that exceeds that of a voting system.

Comment Re:"Of course it can," says government (Score 1) 168

Faraday cages are really good for RF, and I was writing about HAARP. The X rays that you get from a radiologist don't have the same energy level as cosmic rays. The best we can do about energetic cosmic rays is to make our equipment less susceptible, because you can never have enough shielding.

Slashdot Top Deals

"What I've done, of course, is total garbage." -- R. Willard, Pure Math 430a

Working...