various temperature for PowerEdge R710

John G. Heim jheim at
Wed Jun 9 09:27:10 CDT 2010

When I want specific temps, I use snmpget. Of course, then you have the 
problem of figuring out which OID corresponds to which temp. And I do not 
know that myself.  I found some of them via google.  For example, the OID 
for chassis temp is So to display 
the chassis temp, you should be able to say:

snmpget -v2c -c public localhost

Maybe somebody on this list knows how to match an OID with a Dell hardware 
sensor. I  do not. The only way I know is to figure it out from various 
examples of snmpget you can find by googling.

----- Original Message ----- 
From: "Zhichao Li" <lzcmichael at>
To: "Tim Small" <tim at>
Cc: <linux-poweredge at>
Sent: Tuesday, June 08, 2010 8:13 PM
Subject: Re: various temperature for PowerEdge R710

> 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?
> Thanks,
> Zhichao
> 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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