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Date: Sun, 30 Jan 2005 22:27:50 +0100
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To: Pertti Kosunen <pertti.kosunen@pp.nic.fi>
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cc: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>
Subject: Re: READ_DMA timeouts caused by ALI southbridge (5.3-STABLE)
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Pertti Kosunen wrote:
> My READ_DMA timeout problem with 160GB disk partitially solved. Asus=20
> A7A266 southbridge (ALi 1535D+) don't support DMA with LBA48. This is=20
> somehow worked around with Windows drivers, so is same possible in=20
> FreeBSD also?

I guess their "workaround" is to use PIO mode to access the portions=20
that need 48bit access. There is currently no provision in ATA for doing =

this on a "quirk" basis, but that could be added at some time. I'll=20
stick it on my TODO list...


--=20

-S=F8ren