Red Hat Bugzilla – Bug 157299
smartd reports farenheit temperatures as celcius
Last modified: 2007-11-30 17:11:05 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050317 Firefox/1.0.2 Description of problem: Suspect reported temperatures are in Farenheit instead of Celcius because hard drive specs for my drive specify a maximum temperature of 55°C /var/log/messages reports temperatures going to 107°C If I take 107 to be Farenheit then temperature is 41°C which is more believable. Version-Release number of selected component (if applicable): smartd version 5.33 [i386-redhat-linux-gnu] How reproducible: Always Steps to Reproduce: 1. on Fedora Core 3 Heidelberg, install the smartd rpm (clean install, no old config files) 2. start the deamon and configure a disk to be monitored by smartd 3. look at /var/log/messages Actual Results: Temperatures reported in /var/log/messages are shown in degrees celcius example: May 6 16:47:52 giga smartd[3756]: Device: /dev/hda, SMART Usage Attribute: 194 Temperature_Celsius changed from 106 to 105 Expected Results: Either the values should have been converted to Celcius, or the line should have said May 6 16:47:52 giga smartd[3756]: Device: /dev/hda, SMART Usage Attribute: 194 Temperature_Farenheit changed from 106 to 105 Additional info: Like said above, the readings I get are impossible if they are in Celcius. Either the readings are false, or the readings are correct but should be converted to Celcius.
Could you please attach smartctl -a /dev/hda output here?
Created attachment 120697 [details] Filtered 'messages' to show problem still exists This is a filtered version of the messages logfile. I included this for completeness
Created attachment 120698 [details] smartctl -a /dev/hda
The actual temperature in Celsius is stored in the Raw value. The value displayed by smartd is actually a normalized value (use -r for printing the raw value). See also: http://smartmontools.sourceforge.net/#FAQ
Well I noticed that but as mentioned the problem is that in /var/log/messages this temperature is considered farenheit instead of celcius
The normalized value can be just anything - for example on some disks (Maxtors) here it is reported always as 253. The real value of the attribute is in the raw value field and it is really Temperature_Celsius.