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[Qemu-devel] Re: qemu-img help missing backing file
From: |
Alexander Graf |
Subject: |
[Qemu-devel] Re: qemu-img help missing backing file |
Date: |
Tue, 30 Mar 2010 14:32:47 +0200 |
On 30.03.2010, at 14:30, Kevin Wolf wrote:
> 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).
Interesting O_o. Maybe it'd be a good idea to give some examples in the help
output? The same way the -e and -b options were having examples there too. That
really makes them easier to find.
Alex