Víctor Córcoles López wrote:
Hello developers. My English is not good.
I see that DMA in Hard Disks in guest OS Windows 2000/XP/2003 is not
avalaible, it run in PIO mode.
How can activate UDMA mode for hard disk ?
I don't think you'd get any advantage of activating DMA inside the qemu
guest-OS, as qemu has to proxy all rw-access into a file anyway, unless
you pass an actual device/partition to qemu. Besides qemu is emulating
the complete pci bus, which cannot use features of actual hardware in
the machine (e.g. your hdd or features your chipset provide). I guess it
would be possible to emulate uDMA inside the vm, too, but it's likely to
even slowdown the emulation.
So long,
Jan
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