Re: Sun Server High Temperature

From: Bruce Esquibel (bje_at_ripco.com)
Date: 02/26/04 

Date: Thu, 26 Feb 2004 18:04:36 +0000 (UTC)

Subhodini Fernandes (subhfern@yahoo.com) wrote:

: We have couple of Sun servers which are showing very high
: temperatures. Specifically the E4500 (showing over 50 deg) and the
: SunFire E280r (over 55-55deg). The high temperatures are for certain
: CPU boards as displayed using Sun Solaris "prtdiag -v" command. This
: is inspite of the fact that the server room temperature is maintained
: at a low of 18-20deg.

Are you sure you are talking about cpu boards and not disk boards (internal
hard drives).

On our E4500 the disk boards run hot compared to the others, maxing out in
the low 50's isn't uncommon. The rest rarely get near 40 (usually low 30's)
with the room temp around 20-22C.

I'm pretty sure the even numbered boards are in the front (normally cpu's)
and odds are the rear ones (ether and disk). If the even ones are within
30-40 (might even min out at 25), I don't think you really have a problem.

Also keep in mind the E4500 blows the hot air out the left side as you are
looking at the front, taking air in from the right side. If it's in a
cabinet (rack) you might want to look into getting rid of that hot air on
the left side, fans on the bottom blowing up or down to get it out of there.

We eventually moved ours to an end cabinet where the left wall of it was
totally removed and the E4500 could just vent to the walkway. I'm just
saying the E4500 seems more picky on where the hot air is going rather than
it taking in cool air.

-bruce
bje@ripco.com