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From: Stephen Hurd <hurds@sasktel.net>
To: Chris <chrcoluk@gmail.com>
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Cc: freebsd-stable@freebsd.org, Ross Penner <ross.penner@gmail.com>
Subject: Re: ad0 READ_DMA TIMEOUT errors on install of 7.0-RELEASE
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> > As a workaround, adding the line:
> > hw.ata.ata_dma="0"
> >
> > To /boot/loader.conf will disable DMA and prevent the hangs that are caused by the DMA timeouts.
> 
> Does that workaround work when the disks are sata?

Don't know.  I personally would assume so, but I wouldn't be surprised if my assumption was proven wrong either.