[Info-vax] Another Alpha "TEMPERATURE_VECTOR" anomaly

[Rich Jordan]

On Aug 21, 8:38 pm, JF Mezei <jfmezei.spam... at vaxination.ca> wrote:
> Rich Jordan wrote:
> > One system consistently reports 43-45C.  The other reports 23-24C.
>
> This may sound silly, but have you tried putting a digital thermometre
> on the outflow of the leftmost fan in the back ?  If both units show the
> same output air temperature, then the CPUs should be at roughly the same.
>
> Is the CPU of the cold system really running ?
>
> Also, have you considered that the temperature sensor for the cold one
> may have been detached and displaced to be outside of the CPU enclosure ?
>
> The CPU in the DS10L is in a "tunnel" through which air is pushed by a
> blower.  Post CPU, the hot air is directed towrds the back but the
> "duct" is not airtight and much hot air bleeds back into the motherboard
> area as well as the PCI card area.
>
> If the temperature sensor was moved accdentally to the area just outside
>  the CPU duct/tunnel, it could be exposed to air that is coming from the
> front fans and not warmed up much yet.

I'll suggest that to the onsite.  The system is running, it is up on
the cluster, and the batch that monitors temperature is definitely
running on the cold system.

Displaced sensor... worth checking if I can find out where the little
bugger is supposed to be.