Boot 2011.08.19 installation media from grub2 via loopback

Question

I have been trying to get the new installation media to boot from grub2 using loopback. The kernel and ramdisk load fine but it fails when it gets to the loopback mounting hook. I receive the following error message:
::Setup a loop device from iso/archlinux-2011.08.19-core-dual.iso located at device /dev/disk/by-label/MULTIBOOT
losetup: /dev/loop0: No suck file or directory
It then tries booting of of a CD, fails, and throws me to the minimal shell.
Has anyone gotten loopback booting of the install media working?
My grub2 entries are:
set drive_label=MULTIBOOT
menuentry "ArchLinux 2011.08.19 i686" {
set isofile="iso/archlinux-2011.08.19-core-dual.iso"
loopback loop /$isofile
echo 'loading kernel...'
linux (loop)/arch/boot/i686/vmlinuz lang=en locale=en_US.UTF-8 ramdisk_size=75% img_dev=/dev/disk/by-label/$drive_label img_loop=$isofile
echo 'loading ramdisk...'
initrd (loop)/arch/boot/i686/archiso.img
menuentry "ArchLinux 2011.08.19 x86_64" {
set isofile="iso/archlinux-2011.08.19-core-dual.iso"
loopback loop /$isofile
echo 'loading kernel...'
linux (loop)/arch/boot/x86_64/vmlinuz lang=en locale=en_US.UTF-8 ramdisk_size=75% img_dev=/dev/disk/by-label/$drive_label img_loop=$isofile
echo 'loading ramdisk...'
initrd (loop)/arch/boot/x86_64/archiso.img
Last edited by billyburly (2011-08-27 19:48:24)

Answer 1

You are welcome.
Oh, but in your case you also need to remaster iso. (I was think when I test these things directly with qemu, passing arguments -kernel/-initrd/-append )
mkdir -p /tmp/archlinux/{mnt,iso}
mount /path/to/your/archlinux-2011.08.19-core-dual.iso /tmp/archlinux/mnt
cp -a /tmp/archlinux/mnt/* /tmp/archlinux/iso
umount /tmp/archlinux/mnt
Now repack initramfs in /tmp/archlinux/iso/arch/boot/{i686,x86_64}/archiso.img
cd /tmp/archlinux/iso/arch
find -type f ! -name checksum.md5 -print0 | xargs -0 md5sum > checksum.md5
mkisofs -r -l \
-b isolinux/isolinux.bin -c isolinux/boot.cat \
-uid 0 -gid 0 \
-udf -allow-limited-size -iso-level 3 \
-input-charset utf-8 -p "prepared by mkarchiso" \
-no-emul-boot -boot-load-size 4 -boot-info-table \
-publisher "Arch Linux <http://www.archlinux.org>" \
-A "Arch Linux Live/Rescue CD" \
-V "ARCH_201108" \
-o "/tmp/archlinux/archlinux-2011.08.19-core-dual.iso" "/tmp/archlinux/iso"
isohybrid "/tmp/archlinux/archlinux-2011.08.19-core-dual.iso"
cd /tmp
rm -r /tmp/archlinux/iso
Good Luck.
Last edited by djgera (2011-08-27 23:02:20)