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[Qemu-devel] Re: DMA with Knoppix and qemu (cvs-version)
From: |
Sven Köhler |
Subject: |
[Qemu-devel] Re: DMA with Knoppix and qemu (cvs-version) |
Date: |
Fri, 05 May 2006 17:59:38 +0200 |
User-agent: |
Thunderbird 1.5.0.2 (Windows/20060308) |
> 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
Ah ha! DMA mode work for harrdisks, but not for cdroms.
Strange - why?
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