Ok, so about 26°C in the room is acceptable. Drives aren’t enclosed, just put on the desk near the keyboard. The room is aerated all the time in summer (no climatisation). In winter Elements Desktop was at about 60°C, with an ambiant temperature of 18-21°C.
Temperatures are mesured direcly by the probes inside each drives, which can be read with SMART informations I guess. So all softwares (Everest Ultimate, HDTune Pro, HWMonitor) gives the same temperatures. Same thing for motherboards, processors, graphic cards… they all have probes. For example my old processor E5200 displays a 59°C temperature when I use it at 100% (encoding x264), and the Samsung drive inside the PC, on which is the system, displays a 32°C temperature.
So if it would be caused by the ambiant temperature, all components would be hot (59°C isn’t hot a processor used at 100%).
I wrote to WDC for the warrantly, too bad for temperature, I suppose I just can accept it as Keith said.
