Re: [Libguestfs] [PATCH v2v] v2v: Allow output to block devices (RHBZ#1868690).

On Tue, Sep 01, 2020 at 10:08:24PM +0300, Nir Soffer wrote: > > > I'm completely sure what the question means, but virt-v2v currently > > > does this: > > > > > > qemu-img create -f FORMAT filename > > > qemu-img convert -n overlay filename > > This works, we also do this with file and block devices in most cases. > > I was confused by: > > > > > > + (* It turns out that libguestfs's disk creation code is > > > > > + * considerably more flexible and easier to use than > > > > > + * qemu-img, so create the disk explicitly using libguestfs > > I guess you don't create qcow2 image without qemu-img? > > > > The new code doesn't change that for files, but the proposal does > > > change it for devices to only this command: > > > > > > qemu-img convert -n overlay device > > This does not work for qcow2, since -n disable creation of the image. I'm going to have to play with this. It may be that we need to drop -n when using devices.