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The other thing you can to is set the clock too high

From what I've read, overclocking is a sure way to find a corrupt SD, so you might be onto something there. Some have said that the UK units are more reliable when they have both UK and Chinese units side-by-side. I don't know if that's true.

and then run it 20% or so slower to get a safety margin

and if you forgot to factor in the 20%? Just a hunch.

After all, digital cameras, smartphones, MP3 players, etc. all get it right.

Exactly, which makes this so frustrating. Call me naive, but this seems like a solved problem.

Now, what definitely helps in both cases is to have a card that is faster than the bus. ... I am using some 30MB/s cards, which should give plenty of safety margin as the Pi seems to level out at about 12MB/s.

Hrm, now from what I've seen it's people using the Class 4 cards who are having better luck than those on Class 6 or 10 cards. But, and my memory from a few years ago is rusty, but at the time I was doing some embedded linux development (just COTS parts) and I wound up going with Class 4 cards instead of 6 or 10 at the time because their actual transfer capability was often higher, at least among certain manufacturers. I forget why, but Class 10 was a "burst out the gates" kind of fast, that faltered shortly. Again, this is years-old r&d, it might have changed by now. I'm running some of those old cards in my Pis and so far so good, though.

Do you have a link to the reference that says it is a timing issue?

I tried looking just now with 'raspberry pi sd card "timing"' and found a bunch of references to it, but, sorry, not the analysis I was thinking of. Just for thread completeness, here's the lkml post talking about the USB problems.

It seems that the threat was efficient:
http://www.generation-nt.com/adgate-free-google-compris-message-actualite-1677052.html

Gates vowed revenge for this, and what better way than to take over the world with computers and make the Curiosity rover run off a modified version of Windows Vista.

Fortunately he failed, it runs on vxWorks

Indeed. And the 3rd gen iPad is way wide of the mark too. Heavier, hotter, sucks battery, all because Tim Cook couldn't think of any way to improve it except to crank resolution up way past anything anybody actually wanted. Oh, and not give it a proper name. Let's see how that works out.

I can say this much in favor of Tim Cook: he did a great job of setting the stage for further gains by Android.

I do not agree that my post is a troll, Apple mods. Please get this through your koolaid addled skulls: crticism is not trolling. Far from it, I actually complimented Tim Cook for the good work he has done in the aid of ridding us all of the Apple menace.

That post was not a troll either, rather it criticizes the herd of Apple camp followers who stoop to spindoctoring on Slashdot. Which does not look good on Apple either. OK, get this through your snivelling skulls: your behavior makes me more critical of Apple, not less. The more you act like that, the more you firm up my public position that Apple has become an an unethical and immoral organization.

And I find Apple be a company that makes great products and doesn't abuse my data.

How do you know that Apple does not abuse your data, or does not intend to once they manage to get hold of some? After all, Apple's reputation for ethics is not exactly stellar.

buy a 6 core Phenom II, overclock it, and pray that AMD can stay around long enough to fix this mess.

Go check the techreport review and look at the price/performance chart: The 2500K has slightly higher performance, lower price, and *much* better energy efficiency.

Go look at the LKML where you'll see Linus & Ingo Molnar calling out AMD for design flaws in Bulldozer's cache that AMD wants to paper-over with kludgy software workarounds in the kernel: http://us.generation-nt.com/answer/patch-x86-amd-correct-f15h-ic-aliasing-issue-help-204200361.html

I feel bad for AMD's engineers. I *don't* feel bad for the marketing hype machine that has been relying on "geek-cred" from sites like Slashdot and the usual David vs. Goliath myth to get unearned praise. If Intel had come out with Bulldozer instead of AMD, we'd be calling this Prescott version 2.0.

Of course cable *is* (technologically) inferior to fiber. There's no doubt about it. 100Mbps would be trivial on fiber, heck 1Gbps would be trivial on fiber.

Correction: 1Gbps is trivial on fiber.

In France the number one ISP, Orange, is deploying fiber using the G-PON technology for residential service. This means 2Gbps downstream and 1Gbps upstream. Of course they don't give you access the the full bandwidth, mostly for commercial reasons. However the point is that the 'optical modem' they send you already communicates at gigabit speeds while being cheap enough to be deployed on a large scale.

Why, in this day and age, are SCADA units still accessible from the public InterTUBES ?

Slammer worm crashed Ohio nuke plant net

Software failure cited in August blackout investigation

Did Blaster worm play a role in August 14 blackout?

Hmm, looks like one of the ClamAV developers was proposing something like this in 2006:

http://us.generation-nt.com/answer/patch-rfc-rearranging-files-improve-disk-performanc-help-181277711.html#r

Could probably use blktrace to do the profiling by logging inode access patterns and identifing inodes that are frequently accessed together. Then those inodes could be packed / defragged next to each other on disk.

BTW, here's an interesting utility to plot inode accesses recorded by blktrace/blkparse :
http://manpages.ubuntu.com/manpages/jaunty/man1/bno_plot.1.html

Also this looks similar:
http://oss.oracle.com/~mason/seekwatcher/