Xserve fan makes allot of noise in YDL3 but not OSX?

[Mackay, Michael]

Nathan,

I see the same thing on my Xserve.  My theory is that an OSX process =
controls the speed of the fan based on CPU temperature, and thus keeps =
everything stable.  Under YD, there is no such process, and the fans at =
their default speed are not running quite fast enough to keep them cool, =
and an on-board failsafe kicks the fans on high to bring the temperature =
back down. =20

My temporary solution is to remove the other disk drive blanks, which =
seems to provide more airflow and keeps things happy.  The right thing, =
of course, would be to implement something that does the same feedback =
loop that seems to be in OSX.  It would be a cool (no pun intended) =
weekend project for someone - if only I had a weekend!

Cheers,

Mike Mackay

-----Original Message-----
From: Nathan Fain [mailto:listuser@mobileye.co.il]
Sent: Tuesday, July 08, 2003 3:05 AM
To: yellowdog-general@lists.terrasoftsolutions.com
Subject: Xserve fan makes allot of noise in YDL3 but not OSX?


Every 10 minutes or so the Xserve (dual CPU if it matters) will turn the
fan's on high (very high) for about 60 seconds and then turn them off.
It didn't happen OSX and I'm wondering why and if anyone has the same
thing happening.

thanks


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