From: Bruce Harvey (BruceH@ROUTESCAPE.COM)
Date: Wed Aug 21 2002 - 09:11:52 EDT
Cosmic radiation and/or natural or artificial magnetic fields are distinct
possibilities.
As memory has become more sensitive, the need to correct these bit-errors
has increased immensely. Laptops only started to be used in the Space
Shuttle fleet when memory could self-correct enough to counter the effects
of radiation in low Earth orbit. Used to be that you required "hardened"
space hardware (still do for critical systems) that not only was shielded
from radiation but also resisted and corrected errors due to radiation.
Pain in the butt to create, and very expensive.
Chalk it up to a supernova, somewhere, or your favorite black hole. Of
course, try explaining that to management without other job prospects ....
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Bruce T. Harvey, Special Projects Developer
bruceh@routescape.com, www.routescape.com
Insight Distribution Systems --- Hunt Valley, MD
-----Original Message-----
From: Bill Verzal [mailto:Bill_Verzal@BCBSIL.COM]
Sent: Wednesday, August 21, 2002 8:45 AM
To: aix-l@Princeton.EDU
Subject: Re: [aix-l] Checkstop analysis .
We had an R50 that does the same thing periodically. Most recently, the
internal bus cables were replaced. The official explanation from the IBM
CE was that the older models do not offer the memory error correction that
the newer PCI machines do. So this will sometimes happen. There is
nothing that can be done. The J50 is the same as the R50 for the most
part, so I'd be inclined to consider the same outcome.
BV
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Bill Verzal
Technical Consultant
Forbes Technical Consulting
(312) 653-3684
bill_verzal@bcbsil.com
MailStop: 27.201C
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