RE: [gentoo-user] Booting LiveCD iso from hard drive with GRUB legacy

[Ivan T. Ivanov]

Hi, 

> -----Original Message-----
> From: Mick [mailto:michaelkintzios@×××××.com]
> Sent: Saturday, May 18, 2013 7:25 PM
> To: gentoo-user@l.g.o
> Subject: Re: [gentoo-user] Booting LiveCD iso from hard drive with GRUB
> legacy
>
> On Saturday 18 May 2013 16:11:13 Ivan T. Ivanov wrote:
>
> > I do have following in my grub/menu.lst and it is working fine.
> >
> > title PC-Doctor DOS
> > root (hd0,0)
> > kernel /boot/memdisk iso
> > initrd /boot/pcdoctor.iso
> >
> > This is sys-boot/grub 0.97-r12
>
> I'm on the same GRUB version.
>
> Unfortunately, I don't have enough space to place the ISO in the /boot
> partition and I don't use an initrd.

initrd is an option/command of the grub itself, instead of pcdoctor.iso knopix iso image
have to be specified and regarding space limitation ... image could be placed anywhere in
the file system only requirements is that it have to be mounted/accessible by grub during 
boot.

>
> Trying this stanza:
>
> title KNOPPIX ISO
> root (hd0,9)        <-- this is my current boot partition <--
> chainloader (hd0,10)/KNOPPIX_V7.0.5DVD-2012-12-21-EN.iso
>
> Gives me this error:  Error 13:  Invalid or unsupported executable format,
> which tells me that it doesn't like/recognise the particular ISO image.
>
> Trying to understand your grub entry - what is /boot/memdisk?  Have you
> built
> some eltorito image for your purpose?  How does it work?

I am not sure how memdisk is working :-), it is part of sys-boot/syslinux
My understanding is that grub is loading memdisk as a kernel/os with an 
option 'iso' and initrd option specifies what to mount as a rootfs?? 

Regards,
Ivan

> --
> Regards,
> Mick