Ultra66 bios

Trying to install a new 120 gig hard drive. The computer cannot detect the drive regardless of if i set it to primamry/secondary master, slave, cable select, etc. I tried to run with just the new hard drive to fdisk and format but cannot detect and i get a message Ultra66 bios not installed. What is this and how do i get my HD to work. Thanks

What kind of computer/motherboard do you have?

ITs a older Dell 600. The mother board is an Intel E139761. Thanks.

The ultra 66 controller may have to be enabled in the bios.

Then you usually get an extra prompt as the machine posts which is like a bios for the controller so you can configure it.