From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LRk1U-0005HO-MI for qemu-devel@nongnu.org; Tue, 27 Jan 2009 04:14:20 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LRk1S-0005Dk-Ue for qemu-devel@nongnu.org; Tue, 27 Jan 2009 04:14:20 -0500 Received: from [199.232.76.173] (port=56396 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LRk1S-0005DW-Qf for qemu-devel@nongnu.org; Tue, 27 Jan 2009 04:14:18 -0500 Received: from mx2.suse.de ([195.135.220.15]:45057) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1LRk1S-0005VO-D1 for qemu-devel@nongnu.org; Tue, 27 Jan 2009 04:14:18 -0500 Message-ID: <497ED1E8.6000003@suse.de> Date: Tue, 27 Jan 2009 10:20:40 +0100 From: Kevin Wolf MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH 0/7] block-vpc: Improve support for VHD images References: <1232989168-27759-1-git-send-email-kwolf@suse.de> <20090126215239.GA9296@shareable.org> In-Reply-To: <20090126215239.GA9296@shareable.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jamie Lokier Cc: qemu-devel@nongnu.org Jamie Lokier schrieb: > Kevin Wolf wrote: >> This patch series improves the support for Virtual PC images. Until >> now, support for this image format is read-only and broken for large >> images. With these patches applied, you can create and write to VHD >> Dynamic Disks and some bugs in the read support are fixed. They have >> been tested with qemu-img convert from and to raw images and a >> successful openSUSE installation on a fresh VHD image. > > Ooh, I look forward to trying these patches. :-) > > I have some VHD image of Windows which always resulted in lots of > scandisk errors when Windows booted from it (using -snapshot), and the > same when converted to a QCOW2 file by qemu-img. I think there is only one integrity patch in the series which fixes images > 4 GB. Is this the case with your image? > (By the way, VPC took *ridiculously* long - about 8 hours for an 80GB > sparse image. VirtualPC appears to use unbuffered writes (equivalent > to O_DIRECT) at least when over SMB, but they are small writes and not > overlapped, so it trickles along very slowly). Well, my implementation probably isn't that fast as well. It's the simplest one I could think of and it's mostly to have at least something to convert images. I don't think I would run a VM on it except for testing. > So I look forward to trying these patches on that image, which I don't > use know but kept for this very purpose, and seeing if it's fixed the > errors. Thanks for testing and please report back. I hope it works fine now. Kevin