Re: [Freeipmi-devel] sensor identifcation

[Anand Babu]

,----[ Albert Chu <address@hidden> ]
| Hmmm, something does not seem right here AB.
| 
| Record ID: 52 Sensor type: HSC SCSI BP Temp (Temperature) Sensor
| System Software ID: 60h Sensor owner Lun: 0h Sensor number: #1
| 
| Record ID: 53 Sensor type: Pwr Unit Status (Power Unit) Sensor System
| Software ID: 10h Sensor owner Lun: 0h Sensor number: #1
| 
| Both of the sensors have the same sensor number.  The differing
| software IDs mean the sensor number is ok (BTW, I checked that they
| are Software IDs and not slave addresses).  However, both sensor
| readings are read by passing sensor_number=1 to the "Get Sensor
| Reading" command.  But a temperature reading is a threshold based
| reading and a power unit reading is a discrete reading.  That
| indicates to me the sensor data is being read incorrectly.
`----
See below.
,----[ Albert Chu <address@hidden> ]
| Should we be ignoring and not reading one of these sensor records??
| According to table 5-4, software IDs of value > 47h are reserved and
| should probably be ignored.  The reading of the first sensor above is
| 0.00 degrees.
`----
Sensors-Numbers of sensors with Software-ID > 0x47 (that are to be
ignored) are reused. They are not really duplicates. 

We are currently displaying, because Intel ISM does.
But, let us ignore those sensors with SW-ID > 0x47. 

,----[ Albert Chu <address@hidden> ]
| A different potential issue is that the code does not seem to check
| the "Discrete/Threshold Reading Mask".  My understanding, is that this
| mask (field 19/20 of a full record SDR) tells us which fields within
| the "Get Sensor Reading" response are useful and which are
| meaningless.
`----
Did not find it much useful. So we ignored it.

-ab

----- Original Message -----
From: Anand Babu <address@hidden>
Date: Tuesday, March 23, 2004 8:01 pm
Subject: Re: [Freeipmi-devel] sensor identifcation

> Simpler solution is to use SDR record number as index.
> Every SDR rec# maps uniquely to a sensor on the system.
> Sensors without SDR records has no meaning.
> 
> -ab
> 
> ,----[ Albert Chu <address@hidden> ]
> | Hey AB,
> | 
> | I'm guessing now the only way to uniquely id a sensor is:
> | 
> | sensor owner ID && sensor owner LUN && sensor number
> | 
> | Sound about right?
> | 
> | Al
> `----
> 
> ----- Original Message -----
> From: Albert Chu <address@hidden>
> Date: Tuesday, March 23, 2004 12:09 pm
> Subject: [Freeipmi-devel] sensor identifcation
> 
> > Hey AB,
> > 
> > Is the sensor number and the sensor ID string the only ways to 
> > uniquelyidentify a particular sensor?  It seems to be that way, 
> but 
> > I just want
> > to double check.
> > 
> > Al
> > 
> > --
> > Albert Chu
> > address@hidden
> > Lawrence Livermore National Laboratory
> > 
> > 
> > 
> > _______________________________________________
> > Freeipmi-devel mailing list
> > address@hidden
> > http://mail.nongnu.org/mailman/listinfo/freeipmi-devel
> > 
> 
> 
> 
> _______________________________________________
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