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

Oliver Joa
2007-12-17T11:17:49Z

Hi,

Alan Cox wrote:

[...]

> For the current kernel and libata you can use libata.dma=3, and it will
> select DMA for disk (1) + CD (2) but not CF cards. With the older IDE it
> should be sufficient to use hda=nodma

Thanks a lot, but it does not work:

If I use libata.dma=3 I get the following:
[ 0.000000] Unknown boot option `libata.dma=3': ignoring

And if I use hda=nodma:
[ 0.000000] ide_setup: hda=nodma -- BAD OPTION

I use kernel 2.6.21.5.

Any Idea?

Thanks

Olli