I'm Puzzled! HDD temperature

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http://forums.opensuse.org – I do not know what is the cause, but since I've installed opensuse 11.2 my hdd temperature always rises up to 50 C, and higher to 53 (when i download something). When at the same time in windows my temperature was max 40-43 (45 when i was scanning it with anivirus), well it can be dust it can be my warm room, but can it be linux or some of its components that make my HDD so hot??? if anyone knows the case please give your ideas. Thank you a lot. (Distributions)