Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!cepu!scw@ucla-locus From: scw@ucla-locus@cepu.UUCP Newsgroups: net.unix-wizards Subject: Re: vax thermostat? Message-ID: <4125@sri-arpa.UUCP> Date: Thu, 11-Aug-83 15:23:00 EDT Article-I.D.: sri-arpa.4125 Posted: Thu Aug 11 15:23:00 1983 Date-Received: Sat, 13-Aug-83 04:55:59 EDT Lines: 24 From: Steve Woods We went a bit further than that in terms of monitoring . . . "overtemp" stuff on the VAX power supplies is purportedly low enough to avoid a fire, but high enough to fry your VAX real good. I used to work on an 11/40 that got fried when the Air-conditioning people turned off the chilled water in our wing of the building; the machine devloped wierd flakey intermentent problems after a few months, such as hanging for 20-30 min then continuing (the only way you could tell [if no one was on it] was the system date/time would be *WRONG*), DEC Field service worked on the thing for 3 weeks and they couldn't fix it until they went and replaced **EVERY** board in the CPU. It seems that what happened was: each board had at least 2 chips that got moved out to the end of their life span by being cooked. Moral: it is a *****VERY***** good idea to have a thermal shutoff switch/circut in you power supply.