[Info-vax] Temperature information via OpenVMS

[Marc Van Dyck]

Stephen Hoffman brought next idea :
> On 2018-05-02 17:29:26 +0000, Mark Berryman said:
>
>> Is there any way to retrieve current ambient temperature information from 
>> within OpenVMS on either a DS15 or an rx2620?  Whether I try DCL or call 
>> the system service directly, I get the error:
>> 
>> %SYSTEM-E-NOT_LOADED, system service or exec routine is not loaded
>> 
>> Does the necessary support exist?
>
> If it's not available in the SNMP MIB data, then the last time I went looking 
> for this environmental and thermal data a while back, it's buried in a very 
> deep rabbit hole of very undocumented and amazing cryptic APIs.   The Insight 
> Management agents and related WBEM/WEBES/IM tools are the official path to 
> this and related data, though at least some of it might also be visible via 
> the OpenVMS SNMP MIBs.   With the Marvel-class AlphaServer boxes, the 
> undocumented system service $get_env_sensors system and the definition of the 
> semi-documented WBEM$PRIVATEER logical name is the usual path.  And this 
> whole area can be a deep, deep rabbit hole.   Conversely, middle-vintage 
> I2C-based AlphaServer boxes do have SYI$_TEMPERATURE_VECTOR, 
> SYI$_POWER_VECTOR, SYI$_FAN_VECTOR and SYI$_THERMAL_VECTOR.   Plugging in an 
> APC NetBotz or (more recently) an Apple Homekit sensor is likely vastly 
> easier than wading into one of the newer boxes, if it's not in the MIBs.

We used to obtain that info from our SAN switches. Definitely much
easier... if you have a SAN of course.

-- 
Marc Van Dyck