From mboxrd@z Thu Jan  1 00:00:00 1970
From: Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: Re: 3.0.3rc3 qcow image created with qemu-img not
	usable?
Date: Thu, 12 Oct 2006 08:59:21 -0500
Message-ID: <452E4A39.9080807@us.ibm.com>
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To: Timo Benk <timo.benk@gmx.de>
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Timo Benk wrote:
> Anthony Liguori wrote:
>   
>> You cannot attach block devices to Domain-0.  Furthermore, you cannot
>> attach non-raw file-based block devices to paravirtual domains.
>>     
> I can and Xen can do so too :-)
>   

Sorry, I forgot about blktap...

blktap requires a certain cluster size for qcow images IIRC.  That's 
probably why qemu-img doesn't work.

Regards,

Anthony Liguori

> I just followed the description in [1].
>
> And the point is as i have explained: it works with qcow-create created
> images but not with qemu-img created images.
>
> I do not know if that is by design or a bug.
>
> IMHO the Xen qcow format is compatible with qemu so it should work.
>
> [1]http://xenbits.xensource.com/xen-3.0.3-testing.hg/tools/blktap/README
>
> Greetings,
> -timo
>