Date: Mon, 17 Feb 2003 22:07:02 +1100 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: FreeBSD Stable List <freebsd-stable@FreeBSD.ORG> Subject: Re: ECC memory error reporting Message-ID: <20030217110701.GF53497@cirb503493.alcatel.com.au> In-Reply-To: <200302142058.h1EKwYhj059269@apollo.backplane.com> References: <20030214070641.GV20271@techometer.net> <1045206745.4513.65.camel@chowder.gsoft.com.au> <xzp7kc3s4ll.fsf@flood.ping.uio.no> <20030214135928.A2869@freebie.xs4all.nl> <3E4D1323.4030005@tenebras.com> <200302142058.h1EKwYhj059269@apollo.backplane.com>
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On Fri, Feb 14, 2003 at 12:58:34PM -0800, Matthew Dillon wrote: > Find old WW2 bomber instrumentation. The government used fairly > serious radioactive material in the glow-in-the-dark phospher > instrumentation markings. I forget what it was exactly. > It isn't enough to hurt you (though bomber pilots staring at rows upon > rows of these instruments for long periods of time might be a different > story), The life-expectancy of a WW2 bomber pilot (at least RAF) was low enough that it's unlikely that staring at the radium-coated instrumentation would have made things detectably worse. (I suspect that you'd have needed a radiation dose in the 100-200 rem range to show up in the statistics). > but they should be sufficient to mess up any high density memory > placed in close proximity (less then an inch away). I recall the big fuss when 64k DRAMS first appeared - the cell size had dropped to the point where a single alpha particle could flip a bit. There was lots of press about which manufacturers has the best packaging to protect against hits. (And I suspect the biggest source was the ceramic or CER-DIP package itself). RAM densities are now 3 orders of magnitude higher and there's virtually no mention of radiation dangers... Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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