As long as you are using the correct UDMA 66 ribbon cable both drives will
run at the speed the BIOS identifies them at.

Mark Rode
The NOSPIN Group

If I put a UDMA 100 hard drive on a UDMA 66 controller, it will be limited
>to UDMA 66 speed. But what if I also put a UDMA 33 drive on the same
>controller with it? Will the UDMA 100 drive run at 33 or will both drives
>run at what they are capable of? Are there any conflicts or problems that I
>need to be aware of? Would I be better off leaving the 100 by itself on the
>primary and put the 33 on the secondary?
>Dennis Thiel

            Do you want to signoff PCBUILD or just change to
                    Digest mode - visit our web site:
                    http://nospin.com/pc/pcbuild.html