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SunMicro Black Box:
ISBU Earthquake Test, San Diego-
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Sun's Project Black Box micro data center. The core protection of all
the equipment "is" the Black Box; a 20' ISBU Shipping Container. 

As you will notice, the strength of the ISBU container is never the
issue. A single ISBU or multiple joined ISBU's are the most perfect 
pre-built structure on the planet, withstanding earthquakes, tornados,
hurricanes, floods, and violence.

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COMMENTARY-
Sun has not mentioned the insulation, but we are quite certain they
have painted the exterior with black Ceramic Insulation paint.  This
is most common and provides the strongest heat and UV protection
available and the lowest cost.  A 1 or 2 mil coating is equivalent to
an R-19 efficiency without fiberglass insulation. 

So we assume they have insulated with sprayfoam inside the ISBU,
then outside with a Cermaic Insulation coating in black color.