I personally am on Windows 7 and my power profile for my HDD is set to never sleep so that means that my drives are always on. The question you've brought up will bring two sides to the story where one side will say that the HDD's arm needs to park and another side will say that the the parking and spinning up is where damage occurs most.
You can read through this article. Though I'd personally suggest that you backup your critical information in case the one you're working off of fails.
I personally am on Windows 7 and my power profile for my HDD is set to never sleep so that means that my drives are always on. The question you've brought up will bring two sides to the story where one side will say that the HDD's arm needs to park and another side will say that the the parking and spinning up is where damage occurs most.
You can read through this article. Though I'd personally suggest that you backup your critical information in case the one you're working off of fails.