18 Jul
2010
18 Jul
'10
3:56 p.m.
On Sun, Jul 18, 2010 at 02:37:54PM +0200, Jörn Nettingsmeier wrote:
it can't be totally sealed, as that would require
an expensive
gasket. my guess is that the way servers are designed, air is drawn
in through the front (the "cold aisle" in datacenter lore), and
expelled through the rear (the "hot aisle"). after some years of
use, it's not so unlikely for gunk to accumulate pretty much
anywhere in the path of the airflow.
and the conductivity of pure industry-strength gunk should never be
underestimated.
Yes, dust will accumulate everywhere. But this switch was well
outside the normal airflow paths, and the outside was clean.
The 'dirt' was indeed a thin film, as Gene suggested.
The machines are configure to reboot after a power failure,
but not if they think they have been switched of manually,
which was what happened.
Meanwhile the second ADI-648 power supply has gone, as the
first one during a night with several city-wide power cuts.
I'm not really impressed by that very big UPS. Or there is
something wrong with its installation.
Ciao,
--
Je veux que la mort me trouve plantant mes choux, mais
nonchalant d’elle, et encore plus de mon jardin imparfait.
(Michel de Montaigne)