Question about smartd temp. readings.

[Erik P. Olsen]

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 Celcius it won't take long before the disks melt down :-(