Does the harddisk holding Windows ever go into sleep mode when running processes on another harddrive?

[GundamF91]

I intentionally put my video files on a 2nd HDD, a separate physical drive, in hopes of giving my 1st harddrive (with windows) a rest over night when the encoding happens. However, it does not appear that the Windows drive never slept.

With all the programs and codec and video files on a separate drive, shouldn't the Windows drive sleep? Or is there something that keeps it up. I thought the background processes would just stay in RAM and not affect the Windows drive.

 

[VirtualLarry]

Windows does registry and pagefile accesses in the background semi-constantly. So therefore, a drive containing Windows' system files never really sleeps.