Re: How to Switch DMA off for only one Harddisk at Kernelboot

Gabriel C
2007-12-16T19:25:42Z

Oliver Joa wrote:
> Hi,

Hi Oliver ,

>
> how can I tell the kernel not to probe DMA for a specific harddisk (e.g.
> hda). My first Drive (hda) is a Compact-Flash Card which can not do DMA.
> The kernel tries at boot to switch to DMA but fails. If I use ide=nodma,
> the kernel boots about 2 minutes faster, but then I can not switch on
> DMA for the second Drive (hdc) which is a normal Harddisk. Do I have to
> live with this 2 minutes waiting time or is there another solution? I
> did not find any kernel-parameter for this purpose.
>
> Sorry if I ask here, but I can not find any solution, and I asked
> already in other groups.
>
> Thank you very much

Should work with hda=nodma or ideX=nodma ( where X is your HDD nr , in your case is 0 )

Also have a look at Documentation/ide.txt.

> Olli

Gabriel