Re: IDE problem: linux-2.5.17

Vojtech Pavlik
2002-05-23T22:43:09Z

On Thu, May 23, 2002 at 08:07:28PM +0200, Martin Dalecki wrote:

> > 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