Testing With Chain Loading

GRUB2 includes a boot image that's loadable from GRUB Legacy, so you can try it out without wiping out your existing, working MBR. To set up GRUB2 without actually writing to the MBR, run

grub2-install --grub-setup=/bin/true /dev/sda

Writing to the MBR

If that works, you can go on testing to writing to your MBR. Same steps as above, but don't tell grub to run the dummy setup program /bin/true

grub2-install /dev/sda

Congratulations! You've reached the point of no return! If you can't boot now you will need to run a rescue CD

Regards,

~Sorabh

On Mon, Jun 11, 2012 at 11:27 AM, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote:

On Sat, Jun 09, 2012 at 02:37:32PM +0300, Pasi Kärkkäinen wrote:
> On Fri, Jun 08, 2012 at 12:00:44AM -0700, sorabh hamirwasia wrote:
> > Hi,
> > I have installed "Xen" on Fedora16 host using "yum install xen" command
> > and it has been installed properly. I can see the changes in
> > /etc/grub2.cfg file too. But when I reboot then the entry for Xen is not
> > listed in the boot menu. On further analyzing I found that in
> > /etc/grub.conf there is no entry related to Xen. Do we need to modify

Wouldn't it be in /boot/grub2/grub.cfg ?

> > grub.conf manually ? If yes then how to do that. ?
> > Please help me with this.
> >
>
> You can tweak the Xen hypervisor cmdline options in:
> /etc/default/grub file, like this:
>
> GRUB_DEFAULT="Xen"
> GRUB_CMDLINE_XEN="dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all"
>
> .. or whatever options you want to use.
> After that update the grub menu: grub2-mkconfig -o /boot/grub2/grub.cfg
>
> -- Pasi
>

> --
> xen mailing list
> xen@lists.fedoraproject.org
> https://admin.fedoraproject.org/mailman/listinfo/xen

--
Regards,
Sorabh