> > I have 40 wires cable. When ide=nodma is passed to 2.5.17 kernel - kernel boots.
> > Am I correct that it is not possible to have DMA on with such cable?
> > Is there any reason for doing that?
> >
> > Note that bus speed is 33 MHz when kernel fails to boot.
> > I mean - how do I specify slower bus speed: 22 MHz?
>
> You know what? I don't answer you directly I will just put a note
> about this in to Documentation/ide.txt which is long overdue anyway :-).
> You should better don't do UDMA>>66 with 40 write cablings. That's all.
The kernel shouldn't select that automatically. If it does, it's a bug.
As for manual setting, it should emit a warning.
-- Vojtech Pavlik SuSE Labs - 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/