I have just purchased Samsung HD160JJ hard drive. I installed HD Tune program to see temperatures of hard drive. The program shows that temperatures are strangly jumping. For example: from 36C to 40C(not rising 36C-37C-38C-39C-40C), but jumps from 36C to 40C. I have also tried HDD Thermometer, where monitoring is 1second. The same situation(from 36C to 40C). Is it normal?