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

[Eric Blake]

On 05/08/2017 11:33 AM, Carl Karsten wrote:
> according to the warning: "Specify the 'raw' format explicitly to remove
> the restrictions."
> 
> I want the restriction.
> 
> format=raw, (write operations on block 0)=restricted

Then omit format=raw.  (It's an unusual request, though).  Or, as others
mentioned in this thread, you can use -snapshot or any other form of
overlay image to keep the original image read-only while still providing
a read-write image that the guest requires for faithful hardware
emulation; and you can always check your overlay after the fact to learn
whether sector 0 was changed.

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

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