Re: Dedicated grub2 partition

[Goh Lip]

On Monday 04,October,2010 06:50 AM, Barry Jackson wrote:
> On 03/10/10 17:26, Goh Lip wrote:


> address@hidden baz]# mount -o loop /iso/pclinuxos-lxde-2010.1.iso

> drwxr-xr-x 3 root root 2048 2010-06-30 14:15 boot/
> drwxr-xr-x 2 root root 8192 2010-06-30 14:31 isolinux/
> -rw-r--r-- 1 root root 598171648 2010-06-30 14:31 livecd.sqfs
> address@hidden baz]# ls -l /mnt/iso/isolinux/

> -rw-r--r-- 1 root root 13605300 2010-06-30 14:15 initrd.gz
> -rw-r--r-- 1 root root 2059536 2010-06-30 14:31 vmlinuz


> The compressed system is called livecd.sqfs in the root - /boot and
> /boot/grub are empty.


Barry, try this.......

menuentry "PCLOS live iso" {
  loopback loop (hd0,x)/<path>/pclinuxos-lxde-2010.1.iso
  linux    (loop)/isolinux/<path>/vmlinuz 
findiso=/<path>/pclinuxos-lxde-2010.1.iso boot=isolinux quiet  noeject 
noprompt
  initrd   (loop)/isolinux/initrd.gz

Note
o Please watch out for vmlinux and vmlinuz above
o (hd0,x) is sdax, not like in grub-legacy of <x-1>
o if "boot=isolinux" doesn't work, change to "boot=boot"
o When working, advisable to use "search xxxxxx xxxx xxxxxxxxxxxx"
  and delete (hd0,x) as per earlier example

> Off topic:-
> Spent tonight trying to get grub2 to work with my on-board SATA
> controllers - still no go. It only sees the first primary partition sda1
> and the first partition in extended sda5. I can boot the PCLOS liveCD
> image in sda1 using the non-iso method and can use all partitions on all
> drives without issues from within that system (uses sata_nv). I can also
> boot into an old Mandriva installation on sda5, but none of my other
> installations.


Earlier you said....
> Most of my menu entries are simple chainloads into grub legacy systems like 
> this in menu.lst :-
>
> title Mandriva 2010.1 x86-64
> root (hd0,20)
> chainloader +1
>
> which in grub.cfg becomes:-
>
> menuentry 'Mandriva 2010.1 x86-64' {
> set root=(hd0,21)
> chainloader +1
> }

Thought you've got these booted?, but never mind, we'll handle the iso 
boot first, ya?
But...still, if the other OS is in grub-legacy, the booting process from 
a grub2 boot has to be by chainloading. Or you can try, at the OS grub2 
to "sudo grub-update" to see the grub.cfg generated.


But okay, we do one thing at a time.

Regards - Goh Lip