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[Qemu-devel] Re: qemu-img help missing backing file


From: Kevin Wolf
Subject: [Qemu-devel] Re: qemu-img help missing backing file
Date: Tue, 30 Mar 2010 14:30:44 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3

Am 30.03.2010 14:22, schrieb Alexander Graf:
> Howdy,
> 
> I just wanted to create a backed qcow2 image and was irritated by qemu-img 
> not showing me the correct command line option. It's just missing from the 
> list:
[...]
> Is this intentional? The actual command still works:
> 
>> address@hidden:~/git/qemu> qemu-img-kvm create -f qcow2 -b 
>> /media/studio/images/SUSE/s390/sles11.raw /dev/shm/sles11-zipl.qcow2
>> Formatting '/dev/shm/sles11-zipl.qcow2', fmt=qcow2 size=21474836480 
>> backing_file='/media/studio/images/SUSE/s390/sles11.raw' encryption=off 
>> cluster_size=0 

-b still works to maintain compatibility with older versions. The
documented way is -o backing_file=foo (the qemu-img output you quote
even contains this option).

Kevin




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