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Re: [Qemu-devel] [PATCH v3 0/4] VHD/VPC format compatibility
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] [PATCH v3 0/4] VHD/VPC format compatibility |
Date: |
Tue, 1 Mar 2016 16:28:50 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Am 25.02.2016 um 18:27 hat Jeff Cody geschrieben:
> Changes from v3:
>
> Patch 2: Added a sample image & tests for Disk2vhd
> Patch 3: When using force_size, set the CHS geometry to max
> (as Disk2vhd does), to maximize backward compatibility (thanks Peter)
> Patch 4: Updated test results due to the above changes in patch 3
>
> Changes from v2:
>
> Patches 2,4: Just use qemu-io instead of a qemu instance (thanks Kevin, Max)
> Patch 3: Use "qem2" for the creator app field, when forcing the size (thanks
> Kevin)
>
> This is a long-standing issue that has come up many times, and has had
> several different patches posted to fix it. Virtual PC, and Hyper-V
> calculate the disk geometry differently for VHD, leading to compatibility
> issues.
>
> We want to fix these compatibility problems, however we want to make sure
> we do not break backwards compatibility.
>
> There are two areas of compatibility addressed:
>
> * Reading images (Patch 1)
> * Creating images (Patch 3)
>
> Please see the commit messages in Patches 1,3 for details.
Thanks, applied to the block branch.
Kevin
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