On Thu, Sep 2, 2021, at 4:00 PM, Dianne Skoll wrote: > On Thu, 2 Sep 2021 15:39:37 -0400 > "Ian! D. Allen" <idallen [ at ] idallen [ dot ] ca> wrote: > > > At 17m53s: "On one five-day [Space Shuttle Mission] there were 161 > > separate bit flips." > > > Okay, maybe we *do* need ECC RAM. > > Certainly on the space shuttle. Probably on important servers on Earth. > > I wonder about flash memory. As flash memory cells shrink, could a cosmic > ray flip the charge on the floating gate? And if so, does flash have the > equivalent of ECC? yeah flash has the same problem. last time I worked with it (8 years ago) it was either BCH based ECC in software or hardware. (Some flash controllers have a controller with BCH in hardware) I tried running a machine with a buggy BCH implementation and it would fail to boot in under a day and took about 1 month to debug -- which is how I know this. To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org