I have an HPdv6t quad notebook with Windows 7 and Ubuntu 11.04 dual booted, both OSes installed on a partitioned Crucial 128 GB SSD. I replaced my optical drive with the HDD that came with the computer which I use for most of my storage.
Same question as Disable or sleep secondary HDD in Macbook but for Windows 7 - I want to keep the HDD drive spun down when I don't need it. Occasionally it will spin down on its own but only after about 10 min of not accessing it, and then it spins back up on its own shortly afterwards for no apparent reason.
As an aside, the reason I want to do this is to prolong the life of the HDD and save battery power. Will it even make much of a difference on either account? How significant is power consumption of a spinning HDD compared to, say, power consumption of the screen or of the sandy bridges integrated graphics?