bug#57802: closed (MBR problem)

[GNU bug Tracking System]

Your message dated Wed, 14 Sep 2022 09:37:02 -0700
with message-id <YyIDLrtpto9j9cxo@ohop.brianlane.com>
and subject line Re: bug#57802: MBR problem
has caused the debbugs.gnu.org bug report #57802,
regarding MBR problem
to be marked as done.

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57802: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=57802
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--- Begin Message --- Subject: MBR problem Date: Wed, 14 Sep 2022 13:31:41 +0200

Hello,

I discovered that Gparted writes to the MBR (0 to 446 sectors) when it is empty.

Yesterday i used a live cd of ubuntu to delete a partition of my disk with Gparted. And my pc didn't boot after that.

My os is a Fedora server installed in UEFI. Note that Grub is not installed in the MBR or in the partition. I don't know how but it boots fine like that.

So i had to delete the code Gparted writed in the MBR (0 to 446 sectors) to boot again ("sudo dd if=/dev/zero of=/dev/sda bs=446 count=1").

I think Gparted should not touch the MBR (0 to 446 sectors) when it is not ask by the user.

Thanks

Thomas

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#57802: MBR problem
>
>
>
>
> Date: 
>
> Wed, 14 Sep 2022 09:37:02 -0700
>
>
>
>
> On Wed, Sep 14, 2022 at 01:31:41PM +0200, Thomas wrote:
> > Hello,
> > 
> > I discovered that Gparted writes to the MBR (0 to 446 sectors) when it is
> > empty.
> > 
> > Yesterday i used a live cd of ubuntu to delete a partition of my disk with
> > Gparted. And my pc didn't boot after that.
> > 
> > My os is a Fedora server installed in UEFI. Note that Grub is not installed
> > in the MBR or in the partition. I don't know how but it boots fine like
> > that.
> > 
> > 
> > So i had to delete the code Gparted writed in the MBR (0 to 446 sectors) to
> > boot again ("sudo dd if=/dev/zero of=/dev/sda bs=446 count=1").
> > 
> > I think Gparted should not touch the MBR (0 to 446 sectors) when it is not
> > ask by the user.
>
> parted is not gparted (see https://gparted.org/), and parted only
> writes the bootloader code when using a msdos disklabel. While it is
> possible to use a msdos disklabel with UEFI, it should be using GPT.
>
> I'm also not sure why a UEFI system wouldn't boot with the MBR written.
> It should just ignore it and use the ESP partition.
>
> Brian
>
> -- 
> Brian C. Lane (PST8PDT) - weldr.io - lorax - parted - pykickstart
>
>
>
> --- End Message ---