Question about smartd temp. readings.

[Seann Clark]

Aaron Konstam wrote:
> On Mon, 2008-11-17 at 10:15 +0100, Erik P. Olsen wrote:
>   
>> I've noticed in logwatch the following smartd readings of hard disk temperature:
>>
>>  /dev/sda :
>>     Usage: Temperature_Celsius (194) changed to
>>       171, 161, 157, 161, 157, 161, 157, 152, 157, 152, 157, 161,
>>       157, 152, 157, 152, 157, 152, 157,
>>
>>  /dev/sdb :
>>     Usage: Temperature_Celsius (194) changed to
>>       157, 148, 144, 141, 144, 141, 144, 141,
>>
>> Is this really Celcius degrees? To me it looks more like Fahrenheit. If it
>> indeed is Celecius it won't take long before the disks melt down :-(
>>
>>     
> Those look too high for F degrees also.
>   

This is something I see as well. What it actually is if you look over 
your smart status, you will see the 'real' temp you should see the 
attribute (using smartctrl --all --device=3ware,2 /dev/twa0)
194 Temperature_Celsius     0x0022   113   105   000    Old_age   
Always       -       34

as opposed to what the reports on my system kick back to me. It seems 
some calculation is off a bit.

/dev/twa0 [3ware_disk_02] :
    Usage: Seek_Error_Rate (7) changed to 
      200, 100, 
    Usage: Temperature_Celsius (194) changed to 
      111, 110, 112, 111, 112, 113, 112, 113, 112, 113, 112, 113, 
      112, 111, 112, 111, 


It doesn't reflect the real temp of the hard drive, so it isn't as much of a panic as it would appear. Just erroneous data from the reports. 

regards,
Seann

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