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Mon, 20 May 2013 06:16:51 -0700 (PDT)
From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Booting LiveCD iso from hard drive with GRUB legacy
Date: Mon, 20 May 2013 14:16:21 +0100
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References: <201305180916.19740.michaelkintzios@gmail.com> <201305181725.19808.michaelkintzios@gmail.com> <002701ce552a$4a76cc50$df6464f0$@mm-sol.com>
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On Monday 20 May 2013 08:18:55 Ivan T. Ivanov wrote:
> > -----Original Message-----
> > From: Mick [mailto:michaelkintzios@gmail.com]
> > Unfortunately, I don't have enough space to place the ISO in the /boot
> > partition and I don't use an initrd.
>=20
> 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.
OK, I pointed initrd to (hd0,10)/KNOPPIX......iso, but I don't know how to=
=20
mount /dev/sda11 as part of the booting process.
This is how I specified it:
title Knoppix ISO
root (hd0,9)
kernel /boot/isolinux/memdisk iso raw
initrd (hd0,10)/KNOPPIX_V7.0.5DVD-2012-12-21-EN.iso
Where (hd0,9) is my /boot partition and (hd0,10) is a large partition that=
=20
contains various images.
> > Trying to understand your grub entry - what is /boot/memdisk? Have you
> > built
> > some eltorito image for your purpose? How does it work?
>=20
> 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??
Yes, that's right:
http://www.syslinux.org/wiki/index.php/MEMDISK
Unfortunately, it can only boot some images it seems, or it can only boot t=
hem=20
if they have been stored in /boot. I copied memdisk from the KNOPPIX DVD t=
o=20
my /boot, grub finds it and runs it, but then it fails to load the Knoppix =
ISO=20
with this error:
MEMDISK: No ramdisk image specified!
=2D-=20
Regards,
Mick
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