From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1LKKEk-0006uc-Dv
	for qemu-devel@nongnu.org; Tue, 06 Jan 2009 17:17:22 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1LKKEi-0006sQ-R7
	for qemu-devel@nongnu.org; Tue, 06 Jan 2009 17:17:21 -0500
Received: from [199.232.76.173] (port=40730 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1LKKEi-0006sM-Kc
	for qemu-devel@nongnu.org; Tue, 06 Jan 2009 17:17:20 -0500
Received: from mail2.shareable.org ([80.68.89.115]:59599)
	by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32)
	(Exim 4.60) (envelope-from <jamie@shareable.org>) id 1LKKEh-0000On-Vb
	for qemu-devel@nongnu.org; Tue, 06 Jan 2009 17:17:20 -0500
Received: from jamie by mail2.shareable.org with local (Exim 4.63)
	(envelope-from <jamie@shareable.org>) id 1LKKEZ-0006vL-RV
	for qemu-devel@nongnu.org; Tue, 06 Jan 2009 22:17:12 +0000
Date: Tue, 6 Jan 2009 22:17:11 +0000
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [Qemu-devel] Merging improvements from VirtualBox OSE into qemu?
Message-ID: <20090106221711.GB25563@shareable.org>
References: <49522F8D.4000203@turnkeylinux.org>
	<200901060841.58772.frank.mehnert@sun.com>
	<49639605.4060403@codemonkey.ws>
	<200901062140.46557.frank.mehnert@sun.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200901062140.46557.frank.mehnert@sun.com>
Reply-To: qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org

Frank Mehnert wrote:
>  * the PIIX3/PIIX4 ATA controller (almost completely rewritten, you
>    might find 5% of the code in the QEMU ATA emulation)

PIIX4 is needed if you're importing a Microsoft Virtual PC image with
a Windows guest.  It won't boot on PIIX3 without some fiddly register
changes, due to Windows booting silliness.  QEMU uses PIIX3, making
such imports fiddly.

>  * backends for VDI, VMDK, VHD file formats

I wonder if the VHD (Virtual PC) backend is more reliable than QEMU's
VHD backend.  I've seen consistently corrupt images when QEMU reads a
VHD, whether in QEMU proper or using qemu-img to convert.

-- Jamie