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Re: [Qemu-devel] format=raw,readonly errors
From: |
Carl Karsten |
Subject: |
Re: [Qemu-devel] format=raw,readonly errors |
Date: |
Mon, 8 May 2017 11:33:40 -0500 |
On Mon, May 8, 2017 at 11:29 AM, Eric Blake <address@hidden> wrote:
> 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).
>
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
- [Qemu-devel] format=raw,readonly errors, Carl Karsten, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Markus Armbruster, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Carl Karsten, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, John Snow, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Carl Karsten, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Eric Blake, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors,
Carl Karsten <=
- Re: [Qemu-devel] format=raw,readonly errors, Eric Blake, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Eric Blake, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Max Reitz, 2017/05/08
- Re: [Qemu-devel] format=raw,readonly errors, Daniel P. Berrange, 2017/05/08