Would I be able to load Arch from wubi based grub [solved]

Question

Hello,
This one of my experience where I am trying to see if I can load Arch (installed on partition not like lookback disk) from grub that is installed on wubi installed ubuntu file.
So far, I could install Arch on disk without installing grub and added entries as follows. But somewhere I am missing something, it is not able to boot when I select option of Arch in the boot.
Could you help me.
Few additional details required to debug this issue:
1. grub.cfg file of ubuntu grub
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-fc296be2-8c59-4f21-a3f8-47c38cd0d537' {
gfxmode $linux_gfx_mode
insmod gzio
insmod ntfs
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870
else
search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870
fi
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.5.0-19-generic
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-fc296be2-8c59-4f21-a3f8-47c38cd0d537' {
menuentry 'Ubuntu, with Linux 3.5.0-19-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-advanced-fc296be2-8c59-4f21-a3f8-47c38cd0d537' {
gfxmode $linux_gfx_mode
insmod gzio
insmod ntfs
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870
else
search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870
fi
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.5.0-19-generic ...'
linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro quiet splash $vt_handoff
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.5.0-19-generic
menuentry 'Ubuntu, with Linux 3.5.0-19-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-recovery-fc296be2-8c59-4f21-a3f8-47c38cd0d537' {
insmod gzio
insmod ntfs
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870
else
search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870
fi
loopback loop0 /ubuntu/disks/root.disk
set root=(loop0)
echo 'Loading Linux 3.5.0-19-generic ...'
linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.5.0-19-generic
### END /etc/grub.d/10_lupin ###
menuentry 'Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-0f490b6c-e92d-42f0-88e1-0bd3c0d27641'{
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 0f490b6c-e92d-42f0-88e1-0bd3c0d27641
else
search --no-floppy --fs-uuid --set=root 0f490b6c-e92d-42f0-88e1-0bd3c0d27641
fi
echo 'Loading Linux core repo kernel ...'
linux /boot/vmlinuz-linux root=UUID=0f490b6c-e92d-42f0-88e1-0bd3c0d27641 ro quiet
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-linux.img
menuentry 'Linux, with Linux core repo kernel (Fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-fallback-0f490b6c-e92d-42f0-88e1-0bd3c0d27641' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos8'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 0f490b6c-e92d-42f0-88e1-0bd3c0d27641
else
search --no-floppy --fs-uuid --set=root 0f490b6c-e92d-42f0-88e1-0bd3c0d27641
fi
echo 'Loading Linux core repo kernel ...'
linux /boot/vmlinuz-linux root=UUID=0f490b6c-e92d-42f0-88e1-0bd3c0d27641 ro quiet
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-linux-fallback.img
2. lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 39.2M 0 part
├─sda2 8:2 0 19.8G 0 part
├─sda3 8:3 0 205.1G 0 part
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 333.7G 0 part /host
├─sda6 8:6 0 233.4G 0 part
├─sda7 8:7 0 100.4G 0 part
├─sda8 8:8 0 100M 0 part
├─sda9 8:9 0 14.7G 0 part
├─sda10 8:10 0 21.4G 0 part
└─sda11 8:11 0 3G 0 part
sr0 11:0 1 1024M 0 rom
loop0 7:0 0 29G 0 loop /
3. blkid
/dev/loop0: UUID="fc296be2-8c59-4f21-a3f8-47c38cd0d537" TYPE="ext4"
/dev/sda1: SEC_TYPE="msdos" LABEL="DellUtility" UUID="5450-4444" TYPE="vfat"
/dev/sda2: LABEL="RECOVERY" UUID="78C4FAC1C4FA80A4" TYPE="ntfs"
/dev/sda3: LABEL="OS" UUID="DACEFCF1CEFCC6B3" TYPE="ntfs"
/dev/sda5: UUID="01CD7BB998DB0870" TYPE="ntfs"
/dev/sda6: UUID="01CD7BB99CA3F750" TYPE="ntfs"
/dev/sda7: LABEL="Windows 8" UUID="01CDBFB52F925F40" TYPE="ntfs"
/dev/sda8: UUID="cdbb5770-d29c-401d-850d-ee30a048ca5e" TYPE="ext2"
/dev/sda9: UUID="0f490b6c-e92d-42f0-88e1-0bd3c0d27641" TYPE="ext2"
/dev/sda10: UUID="2e7682e5-8917-4edc-9bf9-044fea2ad738" TYPE="ext2"
/dev/sda11: UUID="6081da70-d622-42b9-b489-309f922b284e" TYPE="swap
Any help is appreciated
Last edited by ameyjah (2012-12-19 14:20:25)

Answer 1

If sda8 is a separate boot partition for Arch, you don't need /boot for the linux and initrd lines in the grub entry. E.g.
linux /vmlinuz-linux root=UUID=0f490b6c-e92d-42f0-88e1-0bd3c0d27641 ro quiet
initrd /initramfs-linux-fallback.img
Removing "quiet" will result in more informative failures. (There are debug options which will get even more info.)