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Old January 23rd 04, 04:44 PM
Sander Vesik
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Default 'Spirit' Communications Emergency

Henry Spencer wrote:
In article ,
Gary W. Swearingen wrote:
jumble should have reset by now, right? What hardware issues could give the
symptoms we are experiencing now?


The dude at this morning's briefing mentioned "SAU" or "SUA" (?) and
something about cosmic rays, in the same breath.


Probably SEU, Single Event Upset, where a bit gets flipped by a particle
hit on a chip. If it's an important bit, a mess can result. :-)

The good news is that an SEU is a transient error, not a permanent failure,
assuming you have some way of resetting and restarting.


Umm... you mean somebody would seriously consider having a project measured
in millions of dollars and not include trivial small things like SECDED,
memory scrubbing and restarts? You know stuff that is slowly coming even
to low end servers? I would be really shocked...

--
Sander

+++ Out of cheese error +++