Article View: alt.folklore.computers
Article #619849Re: 1956 -- circuit reliability book
From: AndyW
Date: Fri, 26 Jan 2018 08:52
Date: Fri, 26 Jan 2018 08:52
30 lines
3215 bytes
3215 bytes
On 25/01/2018 20:54, Peter Flass wrote: > This sounds good for mechanical parts, but what about electronics? Things > seem to fail catastrophically with lots of magic smoke. Modern electronics (with the exception of capacitor drift) usually just fail without appreciable degradation which is where redundant systems come into play with supervisor systems to handle the votes. For critical systems it is common to have multiple parallel systems all voting with a supervisor system making the decision based on the votes. The failure of one system can be detected and worked around. For really critical systems the parallel systems are often built using different design teams and technology to eliminate common mode failures. Less critical systems have a supervisor to detect a failure and switch to a 'graceful degradation' mode that provides basic level service like your car switching to 'limp home' mode. At one time we spent millions of toughening up electronics, pre-stressing and hardening etc but they still failed. The modern idea for repairable systems (eg not one-shot items such as space probes) is to accept that they will fail and design the system to handle those failures. Even desktop PCs can be built to handle failure with the use of RAID arrays that saves you data even after a catastrophic failure. I always had the thought to add a filter to server room AirCon then we might be able to catch the magic smoke and glue it back into the escape point. Maybe this is my million dollar idea....... Andy
Technical Details
Message-ID:
<7%BaC.403362$oD1.361947@fx44.am4>Path:
mbox-mo1.pugleaf.net!n14ni7148wmi.0!nntp.google.com!proxad.net!feeder1-2.proxad.net!weretis.net!feeder4.news.weretis.net!news.unit0.net!peer03.am4!peer.am4.highwinds-media.com!peer03.fr7!futter-mich.highwinds-media.com!news.highwinds-media.com!fx44.am4.POSTED!not-for-mailReferences:
<2884a417-2702-428f-89fb-d21cda9eeaed@googlegroups.com> <udC9C.1255934$OX.701066@fx47.am4> <p489980jjf@news4.newsguy.com> <ncX9C.1315538$OX.1044998@fx47.am4> <p4ahqj11kbc@news4.newsguy.com> <mJfaC.477462$5Z7.373847@fx29.am4> <992234747.538605610.977684.peter_flass-yahoo.com@news.eternal-september.org>Show Full Headers
Complete Article Headers
X-Received: by 10.28.160.18 with SMTP id j18mr1391764wme.15.1516956741615; Fri, 26 Jan 2018 00:52:21 -0800 (PST) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 10.28.138.19 with SMTP id m19ls3890588wmd.5.gmail; Fri, 26 Jan 2018 00:52:20 -0800 (PST) X-Received: by 10.28.190.2 with SMTP id o2mr1659437wmf.2.1516956740706; Fri, 26 Jan 2018 00:52:20 -0800 (PST) Path: mbox-mo1.pugleaf.net!n14ni7148wmi.0!nntp.google.com!proxad.net!feeder1-2.proxad.net!weretis.net!feeder4.news.weretis.net!news.unit0.net!peer03.am4!peer.am4.highwinds-media.com!peer03.fr7!futter-mich.highwinds-media.com!news.highwinds-media.com!fx44.am4.POSTED!not-for-mail Subject: Re: 1956 -- circuit reliability book Newsgroups: alt.folklore.computers References: <2884a417-2702-428f-89fb-d21cda9eeaed@googlegroups.com> <udC9C.1255934$OX.701066@fx47.am4> <p489980jjf@news4.newsguy.com> <ncX9C.1315538$OX.1044998@fx47.am4> <p4ahqj11kbc@news4.newsguy.com> <mJfaC.477462$5Z7.373847@fx29.am4> <992234747.538605610.977684.peter_flass-yahoo.com@news.eternal-september.org> From: AndyW <An...@nojunqmail.com> User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <992234747.538605610.977684.peter_flass-yahoo.com@news.eternal-september.org> Lines: 30 Message-ID: <7%BaC.403362$oD1.361947@fx44.am4> X-Complaints-To: ab...@usenet-news.net NNTP-Posting-Date: Fri, 26 Jan 2018 08:52:19 UTC Organization: usenet-news.net Date: Fri, 26 Jan 2018 08:52:17 +0000 X-Received-Bytes: 2604 X-Received-Body-CRC: 1762851585 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit