[c-nsp] Multiple power supply failures. Advise needed

[Randy McAnally]

You could pull apart a blown supply and look for them.  According to the wiki
they should be somewhat visible, at least with a magnifying glass.

--
Randy

---------- Original Message -----------
From: Michael Ulitskiy <mulitskiy at acedsl.com>
To: cisco-nsp at puck.nether.net
Sent: Tue, 1 Sep 2009 16:35:49 -0400
Subject: Re: [c-nsp] Multiple power supply failures. Advise needed

> Well, I find the idea with whiskers particularly interesting,
>  because a lot of things described are perfectly matched with my situation.
> We did recently moved, the data-center does have tiled raised floor 
> (don't know if it zinced though) and the airflow is bottom to top 
> which probably helps to bring conductive particles like metal dust 
> up to the server level where it can be sucked by the power supply 
> fan. The place is new and we've been the first to occupy it, so we 
> have the longest exposure and if this theory is true we should be 
> the most affected and we are.
> 
> Now I've spent last hour googling and I can't see what I can do to 
> help it. Any suggestions?
> 
> Michael
> 
> On Tuesday 01 September 2009 02:29:21 pm Mark Kent wrote:
> > >> Check out http://en.wikipedia.org/wiki/Zinc_whiskers and Google for
> > >> "zinc whiskers".
> > 
> > Or, just as useful to you, check out new-ish research results:
> > 
> >   http://blogs.physicstoday.org/update/2009/05/how-tin-whiskers-grow.html
> > 
> > Note that it is in-plane strain *gradients* that lead to the whisker
> > growth.  If you were previously working on the strains themselves then
> > this may be the big break you were looking for.
> > 
> > -mark
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------- End of Original Message -------