various temperature for PowerEdge R710

Zhichao Li lzcmichael at
Tue Jun 8 20:13:04 CDT 2010

Thanks Tim.

And I just don't understand why Dell give the same name "Temp" for
all kinds of temperature sensors. I mean, how can I tell which one is
for which temperature sensors?

Could someone give me some ideas about that?


On Tue, Jun 8, 2010 at 11:33 AM, Tim Small <tim at> wrote:

> Zhichao Li wrote:
> > especially the first Temp, I mean it's weired the value is less than
> > zero.
> >
> That's likely to be the CPU thermal margin - i.e. it's not an absolute
> temperature, but is relative to the upper limit set by the CPU.  I'm not
> really sure why the BMC reports it like this, possibly that's just all
> the information that the CPU makes available.
> It shows up using "ipmitool sdr list", but not "ipmitool sensor list" -
> without checking, I assume the second method is asking for an absolute
> temperature (which comes back as "na" on this PE R300).
> Tim.

Zhichao Li
Computer Science Department
Stony Brook University
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