On 10 Jan 2024 17:07 -0000, from cu...@free.fr (Curt): > It's curious, but I just heard something on French TV from a journalist > that's relevant to this. She said she'd covered the aeronautics field in > the past and mentioned the *principe de dissemblance* (dissimilarity > principle). Critical redundant parts on aircraft, she claimed, would be > sourced from different manufacturers in order to obviate the possibility > of redundant failures you've raised here.
Indeed. My understanding is that it's even relatively common, at least for flight-critical components, to use totally different implementations (of both hardware and software), not just sourced from different vendors, resellers or batches, such that the same software bug _cannot_ reasonably appear in both, reducing the scope of software errors to _specification_ bugs, which an inherently engineering field (physical engineering, fluid dynamics, ...) is better equipped to deal with early. Recent events notwithstanding. As for David's note on OP's RAID array, I think that point has been sufficiently made by now in this thread; and let's hope that the new backup drive arrives soon enough that a full copy can be made before there is any actual data loss. -- Michael Kjörling 🔗 https://michael.kjorling.se “Remember when, on the Internet, nobody cared that you were a dog?”
