I was doing my 3 monthly internal cleaning, the CPU fan (removing dust etc). When I touched the Hard Disk to be surprised how hot it was. Is it meant to be hot during operation? My PC: Aspire XC-330 only has a single fan for the CPU. Previous PCs i owned always had 2nd fan to circulate air. I thought I could add an additional fan, but I can find no information on the motherboard (so i can determine where to connect fan), and there seems to be know where on the case to hold one either. The PC is standing free of any clutter, it is hot today in my town, temp in my room is 30C. If i had to guess the temp of the HD is probably about 40C. Is this normal? Thanks.
//Edited the content to add model name.