11G wrong IPMI data

[Patrick Schreurs]

Matt Domsch wrote:
> On Fri, Jul 10, 2009 at 10:40:24AM +0200, Patrick Schreurs wrote:
>> Hello,
>>
>> I'm struggling with temperature monitoring on a Dell R710. IPMI reports 
>> a sensor as critical. We several R170's in a professional cool 
>> datacenter. They all report the same critial:
>>
>> ~# ipmitool sdr|grep cr
>> Temp             | 53 degrees C      | cr
>>
>> The ambient temperature of this server is 17 degrees (celsius). Dell 
>> advices to adjust the datacenter's climate, which isn't very helpful.
> 
> At some point, the specification for these values changed.  Instead of
> being an actual $temperature_now, the value means "delta between
> $temperature_now and $temperature_fail", e.g. the amount of safety
> room you have before you hit the critical point.

Below are the details form this sensor (ipmitool -v):

Sensor ID              : Temp (0xc)
  Entity ID             : 8.1 (Memory Module)
  Sensor Type (Analog)  : Temperature
  Sensor Reading        : 53 (+/- 1) degrees C
  Status                : Upper Critical
  Nominal Reading       : 23.000
  Normal Minimum        : 11.000
  Normal Maximum        : 69.000
  Upper critical        : 47.000
  Upper non-critical    : 42.000
  Lower critical        : 3.000
  Lower non-critical    : 8.000
  Positive Hysteresis   : 1.000
  Negative Hysteresis   : 1.000
  Minimum sensor range  : Unspecified
  Maximum sensor range  : Unspecified
  Event Message Control : Per-threshold
  Readable Thresholds   : lcr lnc unc ucr
  Settable Thresholds   : lcr lnc unc ucr
  Threshold Read Mask   : lcr lnc unc ucr
  Event Status          : Event Messages Disabled
  Assertion Events      : unc+ ucr+
  Event Enable          : Event Messages Disabled
  Assertions Enabled    :

The upper and lower limits (like $temperature_fail) are stored in 
hardware, right? So the hardware concludes the specific reading results 
in an 'Upper Critical'. So, is this a bug which needs fixing?

Thanks.

-Patrick