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Re: [Qemu-discuss] [libvirt-users] libvirt live migration, qcow2 image,

From: Kashyap Chamarthy
Subject: Re: [Qemu-discuss] [libvirt-users] libvirt live migration, qcow2 image, nbd server
Date: Fri, 13 Feb 2015 11:15:00 +0100
User-agent: Mutt/ (2014-03-12)

On Thu, Feb 12, 2015 at 08:41:31PM -0600, Edward Young wrote:
> Hi all,
> When I live migrate a vm using
> "migrate --live --copy-storage-all mig-vm qemu+ssh://
> tcp://"
> I got the following error
>              WARNING: Image format was not specified for
> 'nbd://node2:49155/drive-virtio-disk0' and probing guessed raw.
> 258          Automatically detecting the format is dangerous for raw
> images, write operations on block 0 will be restricted.
> 259          Specify the 'raw' format explicitly to remove the restrictions.
> >From the error itself, I can tell that nbd server treat this image as raw,
> rather than qcow2. My platform is libvirt+qemu. the image type of this vm
> is indeed qcow2. I do not know how to let nbd know this image format.

Hmm, I wonder if `virsh --migrate` should have a --format (or -F) option
that one can specify the format. Let's see what Eric Blake and others say.


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