On Nov 26, 2013, at 7:39 PM, Ralf Corsepius <rc040...@freenet.de> wrote:

> On 11/26/2013 11:56 PM, poma wrote:
>> On 26.11.2013 23:18, Michael Schwendt wrote:
>> 
>>> That's because your setup is wrong. If I were you, I would install a
>>> bootloader into the boot sector of each of your /boot partitions and
>>> chainload them from your MBR.
>> 
>> Are you kidding?
> 
> I guess, he isn't. It's what I recommend, too. It's the only way to make sure 
> the different OSes/distros bootloaders do not interfere with each other.

Well it's not a good recommendation to do what is explicitly not recommended by 
GRUB devs. grub-install spits out a warning if you try to do this, by the way. 
It requires the user pass --force for it to work. And --force also isn't 
supported by anaconda for 4-5 Fedora releases now.  It can't be used if /boot 
is on XFS or LVM or md RAID, all of which lack boot loader padding areas, so 
fewer configurations are supported. You're better off using extlinux if you 
want something that supports installation to a partition.

The earlier suggestion to have the primary grub.cfg include an entry using 
configfile to point to each distribution's grub.cfg is the better way to handle 
this. Each distribution updates only their own grub.cfg. And as far as I'm 
aware, no distribution ever re-runs grub-install, so the existing bootloader is 
only going to be "interfered" with by users reinstalling the bootloader or 
installing a new OS.


Chris Murphy
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