Re: OSB4 issues on 2.4.19-ac4

Jonathan Lundell (linux@lundell-bros.com)
Tue, 6 Aug 2002 13:58:11 -0700

At 11:01 PM +0100 8/6/02, Alan Cox wrote:
>On Tue, 2002-08-06 at 19:55, Samuel Flory wrote:
>> It appears that the OSB4 ide controller isn't working on ac4. I have
>> a Tyan 2515, and 2518 which hang when dma is enabled.
>
>DMA enabled by you or by the driver. Right now the driver isnt supposed
>to be enabling DMA on OSB4

FWIW, we're building systems with OSB4s, and can consistently
generate the advertised IDE corruption if we enable Ultra DMA (this
is with RH 2.4.9-31, which has an extra OSB4 warning message; the
message correlates with on-disk corruption).

After suffering with PIO for a month or three, we did fairly
extensive testing with multiword DMA (non-Ultra), and are feeling
confident enough about it to leave it turned on.

-- 
/Jonathan Lundell.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/