Netra T1 Temperature
Hi All,
I have been monitoring the temperature of my Netra T1 system using "lom -t" from Solaris 8. I am little bit confused about the warning and panic levels. Here is the output from "lom -t":
#lom -t
System Temperature Sensors:
1Enclosure 26 degC : warning 67 degC : shutdown 72 degC
System Over-temperature Sensors:
1 CPU status=ok
When I look at the Netra T1 Server User's Guide, I found the following for the temperature limits:
Operating: 5?C to 40?C (41?F to 104?F)
So, my question is, according to user's manual the highest temp is 40C. However, lom is set to warn at 67C and shutdown at 72C. So, which one is true (40C or 72C)? There seems to be an inconsistent settings here, right? Should my tool start warning at somewhere below 40C or below 70C?
Any comments?
Thanks,
[858 byte] By [
rami] at [2007-11-26 11:23:51]
# 1
The operating range of 5C through 40C is the recommended range
for room temperature, not the level of heat for the cpu core.
The other temperature references you describe are for something completely different.
There is a thermister sensor inside the chassis of the computer
that monitors heat inside the box. It is a part of the systemboard.
At 67C you will get log entries to warn you of heat inside the computer.
At a cpu core temperature of 72C, the computer will automatically shut itself down.
This is a thermal protection function in the design of the computer,
so that expensive components do not melt into a lump of silicon "goo".
Since the cpu modules on most of those systems are an integral part of the systemboard,
you would have a lot of replacement parts to buy.
By the way, do not expect that automatic thermal shutdown to be graceful.
It will just suddenly shut everything off.
That is one reason for the warnings, to permit you to intervene
and gracefully bring it down with a shutdown command.
