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

[Carl Karsten <carl@personnelware.com>]

On Mon, May 8, 2017 at 11:29 AM, Eric Blake <eblake@redhat.com> wrote:

> On 05/08/2017 10:56 AM, Carl Karsten wrote:
>
> >>>>> juser@gator:~/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).
>

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



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


-- 
Carl K