Re: Managing multi grub installs

[Goh Lip]

On 03/12/2014 01:32 AM, Rustom Mody wrote:
> On Tue, Mar 11, 2014 at 9:53 PM, Jordan Uggla <address@hidden> wrote:
> > On Mon, Mar 10, 2014 at 8:21 AM, Rustom Mody <address@hidden> wrote:
> > > > menuentry "Debian bootloader" {
> > > >    search --set --label Debian500G
> > > >    multiboot /boot/grub/i386-pc/core.img
> > > > }
> > >
> > > Tried this. I get:
> > >
> > > Welcome to Grub (in inverse video)
> > > error file not found
> > > Entering rescue mode
> > > grub rescue>
> > >
> > > How I tried:
> > >
> > > At the grub prompt I gave the following
> > > multiboot (hd0,5)/boot/grub/core.img
> >
> > Note that "root=(something,else); multiboot
> > (hd0,5)/boot/grub/core.img" is *not* functionally equivalent to
> > "root=(hd0,5); multiboot (hd0,5)/boot/grub/core.img". The multiboot
> > loader actually uses the value of $root and passes that information
> > along to the kernel its loading, in the case of loading grub it's used
> > to find the correct device value for $prefix.
> >
> > Try actually using "search --set=root --fs-uuid=UUID_HERE; multiboot
> > /boot/grub/core.img".
>
> Same result; viz. I get this
>
> Welcome to Grub (in inverse video)
> error file not found
> Entering rescue mode
> grub rescue>
>
> Slightly different words if I put --fs-uuid=UUID_HERE
> Exactly the above when there is no '=' sign
>
> Also tried with label (which is my original) -- same thing
>
> I preceded that line by a
> insmod multiboot


Multiboot works only with grub version is 2.00. Not with version 1.99 
and below. You can try to boot the vmlinuz/initrd directly with


menuentry "Debian bootloader" {
  search --label --set=root Debian500G
  linux /vmlinuz root=LABEL=Debian500G ro
  initrd /initrd.img
}