MBP harddrive makes a lot of noise after working for few hours

Harddrive on My MacBookPro INtel 15" 2.0 makes nose after using it for few hours?
It also overheats. I took it to Apple care and they performed series of test and found nothing. To be honest, this is the on laptop that I had which gave anourmous amount of heat. I cant put it on my laps so I wouldnt call laptop.
Are these know issues?
Thanks.
M

Did you consider to read your manual before you went into the store?
Quote:
"Using Your MacBook Pro
When you’re using your MacBook Pro or charging the battery, it is normal for the bottom of the case to get warm. For prolonged use, place your MacBook Pro on a flat, stable surface.
Do not leave the bottom of your MacBook Pro in contact with your lap or any surface of your body for extended periods. Prolonged contact with your body could cause discomfort and potentially a burn.
The bottom of the MacBook Pro case functions as a cooling surface that transfers heat from inside the computer to the cooler air outside. The bottom of the case is raised slightly to allow airflow that keeps the unit within normal operating temperatures. In addition, warm air is vented from the slots in the back of the case."

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