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

Matthew Garrett mjg59 at
Sun Apr 29 13:43:12 UTC 2007

On Fri, Apr 27, 2007 at 03:05:18PM -0400, Phillip Susi wrote:
> 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.

As has been the case for a long time, the kernel and drive are supposed 
to negotiate the appropriate speeds themselves. If that's not happening, 
please file a bug against the kernel.

Matthew Garrett | mjg59 at

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