On 07/05/06, Jens Axboe <[EMAIL PROTECTED]> wrote:
On Sat, May 06 2006, andrzej zaborowski wrote:
> Hi there,
>
> On 05/05/06, Sven Köhler <[EMAIL PROTECTED]> wrote:
> >Hi,
> >
> >i just booted a recent knoppix-cd (4.0.2) and i'm trying to enable DMA,
> >but it won't work!
> >
> >I started qemu with that command:
> >
> >qemu -m 256 -cdrom knoppix.iso -boot d
> >
> >But inside knoppix, a "hdparm -d1 /dev/hdc" won't work:
> > HDIO_SET_DMA failed: Operation not permitted
> >
> Just a note: setting DMA through hdparm doesn't work on Linux since
> tens of versions ago, it's been depreceted and you have to trust the
> on-boot autodetection (and it works fine -- unless you didn't compile
> the right driver in). It's the same on real machines.
Nonsense, hdparm -d1 is a perfectly valid way to enable DMA on PATA
drives post boot.
Oops, right, the documentation confirms that. I don't know why I was
thinking that.
--
Jens Axboe
Regards,
Andrzej
--
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