ATAng vs Aladdin chipset

[Soren Schmidt]

It seems Pete Carah wrote:
>ASUS P5A or P5AB (one of each now) - won't boot without setting
>hw.ata.ata_dma=0.  GEOM recognizes the drive itself but then the reads
>of the disklabels fail with a message that I can't find in the source,
>about a DMA failure.  System then prompts to mount root and nothing I
>type works.  I see looking at the list archive that I'm not the only 
>one with this problem.  The message appears 3 times per drive with some 
>seconds between, implying to me that it is (at least) a missing interrupt
>(or completely missing operation?).

I'm aware of the problem, I dont know why it happens though. 
I do have a P5A somewhere in the attic, I'll give it a go as soon as
I get the time...

-Søren