Hi,

I have tried that too and that did not help either (i.e adding the format type=gpt)

The output you requested

```

$ sudo qemu-img info --backing-chain /var/virt/WINDOWS/WIN11
image: /var/virt/WINDOWS/WIN11
file format: qcow2
virtual size: 60 GiB (64424509440 bytes)
disk size: 55.1 GiB
cluster_size: 65536
backing file: WIN11-BASE (actual path: /var/virt/WINDOWS/WIN11-BASE)
backing file format: raw
Format specific information:
compat: 1.1
compression type: zlib
lazy refcounts: false
refcount bits: 16
corrupt: false
extended l2: false
Child node '/file':
filename: /var/virt/WINDOWS/WIN11
protocol type: file
file length: 55.1 GiB (59202338816 bytes)
disk size: 55.1 GiB

image: /var/virt/WINDOWS/WIN11-BASE
file format: raw
virtual size: 60 GiB (64424509440 bytes)
disk size: 26.5 GiB
Child node '/file':
filename: /var/virt/WINDOWS/WIN11-BASE
protocol type: file
file length: 60 GiB (64424509440 bytes)
disk size: 26.5 GiB

```

On Thu, Sep 21, 2023 at 2:52 PM Peter Krempa <pkrempa@redhat.com> wrote:

On Thu, Sep 21, 2023 at 10:50:07 +0100, Bhasker C V wrote:
> Attaching win11.xml
> Please note that this used to work fine. It is failing now on libvirt-
> 9.7.0-1
>
> On Thu, Sep 21, 2023 at 9:13 AM Peter Krempa <pkrempa@redhat.com> wrote:
>
> > On Thu, Sep 21, 2023 at 09:05:43 +0100, Bhasker C V wrote:
> > > Adding libvirt mailing list
> > > apologies for cross-posting
> > > libvirt version: 9.7.0-1
> > >
> > > On Thu, Sep 21, 2023 at 8:39 AM john doe <johndoe65534@mail.com> wrote:
> > >
> > > > On 9/21/23 09:32, Bhasker C V wrote:
> > > > > I am getting an error with libivrt when I create a VM
> > > > >
> > > > > ```
> > > > > $ sudo virsh create ./win11.xml
> >
> > Please attach the XML used here. It comes from a code path which
> > shouldn't be possible to reach.
> >
> > > > > error: Failed to create domain from ./win11.xml
> > > > > error: internal error: mishandled storage format 'none'
> > > > >
> > > > > ```
> > > > >
> > > > > This is after I have done a dist-upgrade (was working fine before)
> > > > > debian trixie.
> >
> > Which version did you have before?
> >
> > > > >
> > > > > error message says
> > > > > qemuBlockStorageSourceGetBlockdevFormatProps:1227 : internal error:
> > > > > mishandled storage format 'none'
> >
> >

> <on_poweroff>destroy</on_poweroff>
> <on_reboot>restart</on_reboot>
> <on_crash>destroy</on_crash>
> <pm>
> <suspend-to-mem enabled='no'/>
> <suspend-to-disk enabled='no'/>
> </pm>
> <devices>
> <emulator>/usr/bin/qemu-system-x86_64</emulator>
> <disk type='file' device='disk'>
> <driver name='qemu' type='qcow2' cache='unsafe'/>
> <source file='/var/virt/WINDOWS/WIN11' index='2'/>
> <target dev='vda' bus='virtio'/>
> </disk>

Could you please also attach the output of:

qemu-img info --backing-chain '/var/virt/WINDOWS/WIN11'

> <disk type="file" device="disk">
> <driver name="qemu" type="raw" cache="unsafe"/>
> <source file="/var/virt/WINDOWS/DUMMY">
> <format type='gpt'/>
> </source>
> <target dev="vdb" bus="virtio"/>
> </disk>

In the definition I don't see anything that would hint that anything
with the disk config is broken, for qcow2 volumes we do auto-detection
of backing images, thus the request for the output of the command above.