How to achieve auto-shutdown of hard drive on old AT machine.

[David M. Patronis]

I have 6.2 installed on an ancient AT machine. I'd like to have the OS 
shut off the hard drive when I halt the system from the KDE interface. 
What do I edit, and what code do I use to achieve this?

Machine specs, if relevant:

GA-586TX2 (Gigabyte) Motherboard
AMD K-6/2 350Mhz CPU (running at 233Mhz.)
256MB of PC100 SDRAM (running at 66Mhz)
10GB IBM Hard Drive
3Com Etherlink III ISA NIC
AWE64 Creative ISA Sound Card
Some very, very, old ATI PCI graphics card I haven't really inspected 
that closely.

David