libata access to pata drives breaks dma/32bit mode?

[Phillip Susi]

I've been seeing several complaints lately from users who have upgraded 
to feisty and their ide disks are now being handled by libata.  It seems 
that hdparm does not work on the devices created by the libata driver, 
so how are you supposed to enable 32bit and dma transfers?  Several 
users have been having trouble because they can not find a way to enable 
them and thus, have poor performance under feisty.