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<blockquote data-quote="spiney" data-source="post: 144711" data-attributes="member: 192438"><p>Yes, interesting, but data corruption is always a problem, which can't ever be "solved".</p><p></p><p>PCs have parity checking, many commercial systems are dual/triple, aircraft have several independent systems, space shuttle has 5 separate computers, etc.</p><p></p><p>Computers are the most unstable machines ever invented, just one bit error (in trillions) will stop them dead!</p><p></p><p>When your PC crashes, it's almost certainly a software (ie, human error!)problem, but - just possibly - due to a cosmic ray!</p><p></p><p>(It's difficult to find "understandable" computer safety stuff on Internet, but many techniques currently used are mentioned at:</p><p></p><p><span style="color: #008000"><a href="http://www.comp.lancs.ac.uk/computing/resources/IanS/Ian/Lectures/COURSES/CritSys/PDF-notes/Dep-validation.pdf" target="_blank">www.comp.lancs.ac.uk/computing/resources/IanS/Ian/Lectures/COURSES/CritSys/PDF-notes/Dep-validation.pdf</a> ).</span></p><p> </p><p><span style="color: #008000">In practice, software reliabilty depends on "formal methods" design, and hardware on multiply redundant systems.</span></p></blockquote><p></p>
[QUOTE="spiney, post: 144711, member: 192438"] Yes, interesting, but data corruption is always a problem, which can't ever be "solved". PCs have parity checking, many commercial systems are dual/triple, aircraft have several independent systems, space shuttle has 5 separate computers, etc. Computers are the most unstable machines ever invented, just one bit error (in trillions) will stop them dead! When your PC crashes, it's almost certainly a software (ie, human error!)problem, but - just possibly - due to a cosmic ray! (It's difficult to find "understandable" computer safety stuff on Internet, but many techniques currently used are mentioned at: [COLOR=#008000][URL="http://www.comp.lancs.ac.uk/computing/resources/IanS/Ian/Lectures/COURSES/CritSys/PDF-notes/Dep-validation.pdf"]www.comp.lancs.ac.uk/computing/resources/IanS/Ian/Lectures/COURSES/CritSys/PDF-notes/Dep-validation.pdf[/URL] ).[/COLOR] [COLOR=#008000][/COLOR] [COLOR=#008000]In practice, software reliabilty depends on "formal methods" design, and hardware on multiply redundant systems.[/COLOR] [/QUOTE]
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