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Re: [Qemu-devel] [PATCH 0/7] block-vpc: Improve support for VHD images
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH 0/7] block-vpc: Improve support for VHD images |
Date: |
Tue, 27 Jan 2009 10:20:40 +0100 |
User-agent: |
Thunderbird 2.0.0.17 (X11/20080922) |
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
- [Qemu-devel] [PATCH 5/7] block-vpc: Use the qemu block layer, (continued)
- [Qemu-devel] [PATCH 5/7] block-vpc: Use the qemu block layer, Kevin Wolf, 2009/01/26
- [Qemu-devel] [PATCH 3/7] block-vpc: Fix disk size, Kevin Wolf, 2009/01/26
- [Qemu-devel] [PATCH 7/7] block-vpc: Create images, Kevin Wolf, 2009/01/26
- [Qemu-devel] [PATCH 2/7] block-vpc: Adapt header structures to official documentation, Kevin Wolf, 2009/01/26
- [Qemu-devel] [PATCH 6/7] block-vpc: Write support, Kevin Wolf, 2009/01/26
- [Qemu-devel] [PATCH 4/7] block-vpc: Fix support for images > 4 GB, Kevin Wolf, 2009/01/26
- Re: [Qemu-devel] [PATCH 0/7] block-vpc: Improve support for VHD images, Jamie Lokier, 2009/01/26
- Re: [Qemu-devel] [PATCH 0/7] block-vpc: Improve support for VHD images,
Kevin Wolf <=