Re: [Qemu-devel] format=raw,readonly errors

[Eric Blake]

On 05/08/2017 10:56 AM, Carl Karsten wrote:

>>>>> address@hidden:~/temp$ qemu-system-x86_64 -m 256 -display curses  -drive
>>>>> file=disk.cow -drive file=boot.img
>>>>> WARNING: Image format was not specified for 'boot.img' and probing
>>>> guessed
>>>>> raw.
>>>>>          Automatically detecting the format is dangerous for raw
>> images,
>>>>> write operations on block 0 will be restricted.
>>>>>          Specify the 'raw' format explicitly to remove the
>> restrictions.

>  "write operations on block 0 will be restricted."
> 
> Is there a way to explicitly enable that?

Yes. Pass format=raw at the right place (in other words, instead of
getting the 'raw' format driver by default, explicitly mentioning that
you KNOW you want the 'raw' format driver is enough to shut up the warning).

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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