Section 5.1 of the VirtualBox User Manual, "Hard disk controllers: IDE,
SATA (AHCI), SCSI", contains the following warning:

Warning: The entire SATA controller and the virtual disks attached to it
(including those in IDE compatibility mode) will only seen by operating
systems that have device support for AHCI. In particular, there is no
support for AHCI in Windows before Windows Vista; Windows XP (even SP2)
will not see such disks unless you install additional drivers. We
therefore do not recommend installing operating systems on SATA disks at
this time.

I don't know if this still applies. If so you may not get any advantage
from using SATA in XP under VirtualBox.

However, if you want to try anyway, this article

http://expertester.wordpress.com/2008/07/27/how-to-enable-ahci-windows-xp/#more-231

says that you don't have to re-install XP to enable AHCI. 

I haven't actually done any of this, so I can't guarantee success. Just
trying to be helpful ;-)


On Thu, 2009-07-16 at 08:46 -0300, Antonio Augusto (Mancha) wrote:
> On Thu, Jul 16, 2009 at 08:31, Louis<[email protected]> wrote:
> > Dear all,
> >
> > After upgrading to Virtualbox V3.0 recently (Ubuntu 9.04 64bit host, XP Pro
> > 32bit as guest), I noticed that there is now support for SATA controller. I
> > was wondering if there is any advantage (improvement in performance?) in
> > configuring hard disks using SATA controller for my XP guest (even if it
> > requires a full reinstall of the guest OS)?
> >
> > For your information, the host system is using SATA hard disks.
> 
> SATA disk is available in VirtualBox for a long time (since 2.0 if
> memory serves me well).
> And yeah, you get better performance using it in place of IDE, because
> the way SATA works.
> 
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> [email protected]
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