[Ham-Computers] Hard drive "parking"

[Dave 'Doc' Corio]

    I have a second hard drive in my system used as storage and backup. 
I'm not crazy about having this drive spinning constantly, when it is 
used for only a short time each day or two. I recall in the "old days" 
that there was a DOS command that allowed "parking" a drive either when 
not in use or for transporting. Is there a simple way to turn a drive 
"off" until it's needed, or is this even a good idea these days?

Tnx es 73
Dave
KB3MOW