Folkert van Heusden <[email protected]> wrote:
>> > http://pdos.csail.mit.edu/papers/softecc:ddopson-meng
softecc_ddopson-meng.pdf
>> > "SoftECC : A System for Software Memory Integrity Checking"
>>
>> Personally, I'd recommend just shelling out the bucks for hardware ECC if
>> the reliability matters.
>
> a question and an idea: Q: is ecc guaranteed to detect all bitflips?
It's guaranteed not to.
Having n extra bits, you can detect n-bit-flips and correct n/2-bit-flips
(provided you use an optimal code).
These extra bits can flip, too, so if you have m >= 1 data bits and any
finite number n of extra bits, it's possible to have an undetectable
n+1-bit-flip.
--
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