> 	If you do this then it would be better to include both in the
> 	kernel config and probe/attach the new ata version on appropriate
> 	machines, falling back to the wdc version on older machines.

I wasn't sure how to do this when I made my initial post. Now that I've 
thought about it a bit, I can see how to do this. I agree that it is better to 
have both systems available.

Cheers,
Lloyd