Vista RC1 and HD power

[KilluminatiStyle]

I installed RC1 onto the system in my sig with no major issues. I have occasionaly crashes right after logging in but appearently this is an issue MS is aware of. The reason I'm posting is about my HD. I was going through some forums when I heard one of my HD's shut down. It made the same little click it makes when I shut my PC down and then I could hear the RPM's spin down. I was thinking to myself "Oh great... now what?" I then opened my computer and tried to access my C: It was fine. Then I did my D: It seemed fine. Almost immediately after I accessed my D: I heard my HD kick back on and the RPM's quickly shot up to the normal hum I hear. All of this happened in the span of maybe 7-10 seconds.

Is there a feature in Vista that shutsdown power to unused HD's or should I start thinking about buying a new hard drive?


EDIT*

It just happend again and this time I waited about 30 seconds before trying to access my D:

As soon as I accessed it the HD spun back up. I take it this is normal then. Kinda neat too... unless it isn't supposed to happen in which case this would be UNCOOL.

[Panama Red]

check your Power Settings. RC1 uses Hibernation.

[KilluminatiStyle]

Right...I began messing with stuff right after I posted and I found the setting that caused it.