GRUB and UUID Startup problems

[jmartinosky]

Ok, I'm about to explode. Here's the situation. I am trying to bring up an atom mobo to be embedded in a final product. I have no CDROM drive, but have a plethora of USB ports, as well as one SATA hard drive. I'm attempting to install Ubuntu 11.04 onto a 4GB SATA DOM, from a running installation of 11.04, which is installed on the hard drive. Installation was made from a flash drive.

I need a UUID agnostic boot. I'm attempting to set this up so we can make (hopefully) thousands of systems, which will all have different IDs. Unfortunately, when I remove the original boot hard drive I end up just after the BIOS message "Verifying DMI Pool Data" with the message "error: no such device:" and then the UUID of the old hard drive.

Try as I might, having spent 2+ days tripping down endless posts, and trying anything that looked remotely promising, I cannot get rid of this dependence on the original hard drive.

What am I missing? I don't see the magic of the new GRUB's dependence on UUIDs.

Thanks

[YesWeCan]

How are you making the copies? Are you copying the Ubuntu partition contents on to the DOM (what does the 'D' in DOM stand for?)? How are you installing Grub on the DOM? Do you need each Ubuntu to have a unique UUID or is it ok for all DOMs to be identical.

[jmartinosky]

The DOM is short for Disk on Module. It's a tiny SSD that plugs directly into the SATA port.

I'm working from instructions generated from an Ubuntu 7.10 version of the product. The DOM is partitioned, and then mkfs is used to set up the drive. Then, GRUB is installed to it from the running system using grub-install /dev/sda. After that, the grub.cfg and vmlinuz are copied over to their proper locations.

[oldfred]

You can use UUIDs, device like /dev/sda1 or labels. I think you might need to use labels and just label every system the same?

http://www.gnu.org/software/grub/manual/grub.html#Invoking-grub_002dinstall


Drive ordering in your operating system may not be the same as the boot drive ordering used by your firmware. Do not assume that your first hard drive (e.g. ‘/dev/sda’) is the one that your firmware will boot from. device.map (see Device map (http://www.gnu.org/software/grub/manual/grub.html#Device-map)) can be used to override this, but it is usually better to use UUIDs or file system labels and avoid depending on drive ordering entirely.

Re: GRUB2 booting with labels (no UUID) MountainX
http://ubuntuforums.org/showpost.php?p=9585951&postcount=19

[YesWeCan]

When you do a grub-install the boot-loader code that is put at the start of your DOM is told the UUID of the root partition on your HD and this is where it looks for /boot/grub files. So when you remove the HD it cannot find the partition.

So what you need to do is create a partition on the DOM that contains /grub/* files (or it can be /boot/grub/*) and tell grub install to use this as the target when installing. It has to be mounted first.

Eg:
sudo mount /dev/sda1 /mnt
sudo grub-install --root-directory=/mnt /dev/sda

That will solve the immediate problem and at worst the DOM will boot to a grub> prompt.

If you want 11.04 to boot up on the DOM you'll need to copy more than vmlinuz across. You'll need to copy the whole root partition, won't you? The other boot issue will arise with /etc/fstab. As a minimum this file sets the partition to mount to be root. Since the UUID of the new DOM partition will be different from that of your HD this will need to be changed. You can change the fstab entry to use /dev/sdaN instead of UUID=... if you are sure that the DOM device will always be sda. The reason UUIDs are used is because different bioses give different names to devices and the names can change when new devices are connected.

[YesWeCan]

oldfred's "by label" is better than using device names. :)
The only gotcha with either is that two DOMs must not be connected to the same PC at the same time or the boot and mounting process will get really screwed up.

If DOMs have unique device IDs then you are in business. fstab can use this, for example:

/dev/disk/by-id/ata-WDC_WD1002FAEX-00Z3A0_WD-WCATR3387738-part1 / ext4 defaults 0 1

(I think that's the correct syntax, anyway)

To automate this you'll need a shell script or something.

[jmartinosky]

Thanks for all the advice. I'm attempting to implement the changes this morning.

As for the system, I can guarantee that only one drive will be installed, and it will be sda. The DOMs are gang programmed and we want to avoid having to set up UUIDs for individual systems.

I am looking into the question about the rest of the root file system. I didn't set up the initial system. I've only been brought in to make this new aspect work, so there is a great deal that is out of my control. As is typical of a project like this, I have to learn why choices were made with the initial system, so some of your questions drive me to find out just why the heck I have the instructions I do have!

Thanks

[jmartinosky]

Ok,
Only half-luck. I've ended up at the BusyBox (initramfs) prompt.

On the plus side, there was no longer a complaint about the hard drive's UUID, so I'm happy there.

Is there a step-by-step listing, somewhere, of the complete boot process, from MBR through GRUB? I suspect there's a detail I've missed somewhere, and I'd be able to understand the boot process and the problems if I could see the entire thing.

Thanks for all the help!

[oldfred]

If you want to see what is installed where in detail including grub in the MBR this tool lists it all. I use it just to document my system as well.
Boot Info Script courtesy of forum members meierfra & Gert Hulselmans
Page with instructions and download:
http://bootinfoscript.sourceforge.net/
Paste contents of results.txt in a New Reply, then highlight entire file and click on # in edit panel(code tags) to make it easier to read.
Or You can generate the tags first by pressing the # icon in the New Reply Edit toolbar and then paste the contents between the generated [ code] paste here [ /code] tags.


This is more for Windows and multibooting but it is MBR computers boot. Grub does not use PBR, but puts some code just after the MBR to allow enough code to find files by name in the partition.
Multibooters, Pictures here worth 1000+ words
http://www.multibooters.co.uk/multiboot.html

[jmartinosky]

Boot Info Script 0.60 from 17 May 2011

============================= Boot Info Summary: ===============================
=> Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos1)/boot/grub on this drive.
=> Grub2 (v1.99) is installed in the MBR of /dev/sdb and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos1)/boot/grub on this drive.
sda1: __________________________________________________ ________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 11.04
Boot files: /boot/grub/grub.cfg /etc/fstab
sda2: __________________________________________________ ________________________
File system: Extended Partition
Boot sector type: -
Boot sector info:
sda5: __________________________________________________ ________________________
File system: swap
Boot sector type: -
Boot sector info:
sda3: __________________________________________________ ________________________
File system: ext4
Boot sector type: Grub Legacy
Boot sector info: Grub Legacy (v0.97-71.fc15) is installed in the boot
sector of sda3 and looks at sector 205343328 on boot
drive #1 for the stage2 file. A stage2 file is at
this location on /dev/sda. Stage2 looks on partition
#3 for /grub/grub.conf.
Operating System:
Boot files: /grub/menu.lst /grub/grub.conf
sda4: __________________________________________________ ________________________
File system: LVM2_member
Boot sector type: -
Boot sector info:
sdb1: __________________________________________________ ________________________
File system: ext4
Boot sector type: -
Boot sector info:
Operating System:
Boot files: /boot/grub/grub.cfg /boot/grub/core.img
vg_sbc2dev1-lv_swap': __________________________________________________ ________
File system:
Boot sector type: Unknown
Boot sector info:
Mounting failed: mount: unknown filesystem type ''
vg_sbc2dev1-lv_home': __________________________________________________ ________
File system:
Boot sector type: Unknown
Boot sector info:
Mounting failed: mount: unknown filesystem type ''
mount: unknown filesystem type ''
vg_sbc2dev1-lv_root': __________________________________________________ ________
File system:
Boot sector type: Unknown
Boot sector info:
Mounting failed: mount: unknown filesystem type ''
mount: unknown filesystem type ''
mount: unknown filesystem type ''
sdc: __________________________________________________ _________________________
File system: vfat
Boot sector type: SYSLINUX 4.04 2011-04-18
Boot sector info: Syslinux looks at sector 8018 of /dev/sdc for its
second stage. SYSLINUX is installed in the directory.
The integrity check of the ADV area failed. No errors
found in the Boot Parameter Block.
Operating System:
Boot files: /syslinux/syslinux.cfg /ldlinux.sys
============================ Drive/Partition Info: =============================
Drive: sda __________________________________________________ ___________________
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sda1 * 2,048 204,802,047 204,800,000 83 Linux
/dev/sda2 972,601,342 976,771,071 4,169,730 5 Extended
/dev/sda5 972,601,344 976,771,071 4,169,728 82 Linux swap / Solaris
/dev/sda3 204,802,048 205,826,047 1,024,000 83 Linux
/dev/sda4 205,826,048 972,599,295 766,773,248 8e Linux LVM

Drive: sdb __________________________________________________ ___________________
Disk /dev/sdb: 8012 MB, 8012390400 bytes
24 heads, 9 sectors/track, 72450 cylinders, total 15649200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
Partition Boot Start Sector End Sector # of Sectors Id System
/dev/sdb1 2,048 15,648,767 15,646,720 83 Linux

"blkid" output: __________________________________________________ ______________
Device UUID TYPE LABEL
/dev/mapper/vg_sbc2dev1-lv_home 198a7145-b837-4587-b4e4-6ab26e55e1a3 ext4
/dev/mapper/vg_sbc2dev1-lv_root e1213ab3-d0e7-4fcb-a9bd-70e1729cb04d ext4 _Fedora-15-i686-
/dev/mapper/vg_sbc2dev1-lv_swap 3dda812b-9bd5-4fb6-965a-6c9e773196c1 swap
/dev/sda1 ada400d3-6ca6-4b34-bf49-8686ae2231da ext4
/dev/sda3 28365794-2002-4e58-aefa-0ba306b8c022 ext4
/dev/sda4 4ZICmX-8y1b-5bmV-0000-jIRj-vJMj-6W2mG5 LVM2_member
/dev/sda5 9f93b9c0-e6b3-4dca-823b-4b4974741286 swap
/dev/sdb1 d8d79929-455d-4f56-b107-d6eea7c560a7 ext4
/dev/sdc 1416-1144 vfat PENDRIVE
========================= "ls -R /dev/mapper/" output: =========================
/dev/mapper:
control
vg_sbc2dev1-lv_home
vg_sbc2dev1-lv_root
vg_sbc2dev1-lv_swap
================================ Mount points: =================================
Device Mount_Point Type Options
/dev/sda1 / ext4 (rw,errors=remount-ro,commit=0)
/dev/sdc /media/PENDRIVE vfat (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000, shortname=mixed,dmask=0077,utf8=1,showexec,flush)

=========================== sda1/boot/grub/grub.cfg: ===========================
--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
set locale_dir=($root)/boot/grub/locale
set lang=en_US
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
play 480 440 1
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root=(hd0,msdos1)
linux /boot/vmlinuz-2.6.38-8-generic root=/dev/sda1 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.38-8-generic
}
menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root=(hd0,msdos1)
echo 'Loading Linux 2.6.38-8-generic ...'
linux /boot/vmlinuz-2.6.38-8-generic root=/dev/sda1 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.38-8-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Fedora (2.6.38.6-26.rc1.fc15.i686) (on /dev/mapper/vg_sbc2dev1-lv_root)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root=(hd0,msdos3)
linux /vmlinuz-2.6.38.6-26.rc1.fc15.i686 ro root=/dev/mapper/vg_sbc2dev1-lv_root rd_LVM_LV=vg_sbc2dev1/lv_root rd_LVM_LV=vg_sbc2dev1/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
initrd /initramfs-2.6.38.6-26.rc1.fc15.i686.img
}
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------
=============================== sda1/etc/fstab: ================================
--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda1 during installation
#UUID=ada400d3-6ca6-4b34-bf49-8686ae2231da / ext4 errors=remount-ro 0 1
/dev/sda1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
#UUID=9f93b9c0-e6b3-4dca-823b-4b4974741286 none swap sw 0 0
/dev/sda5 none swap sw 0 0
--------------------------------------------------------------------------------
=================== sda1: Location of files loaded by Grub: ====================
GiB - GB File Fragment(s)
12.237480164 = 13.139894272 boot/grub/grub.cfg 1
2.405509949 = 2.582896640 boot/initrd.img-2.6.38-8-generic 2
0.668861389 = 0.718184448 boot/vmlinuz-2.6.38-8-generic 1
2.405509949 = 2.582896640 initrd.img 2
0.668861389 = 0.718184448 vmlinuz 1
============================= sda3/grub/grub.conf: =============================
--------------------------------------------------------------------------------
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,2)
# kernel /vmlinuz-version ro root=/dev/mapper/vg_sbc2dev1-lv_root
# initrd /initrd-[generic-]version.img
#boot=/dev/sda3
default=0
timeout=0
splashimage=(hd0,2)/grub/splash.xpm.gz
hiddenmenu
title Fedora (2.6.38.6-26.rc1.fc15.i686)
root (hd0,2)
kernel /vmlinuz-2.6.38.6-26.rc1.fc15.i686 ro root=/dev/mapper/vg_sbc2dev1-lv_root rd_LVM_LV=vg_sbc2dev1/lv_root rd_LVM_LV=vg_sbc2dev1/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
initrd /initramfs-2.6.38.6-26.rc1.fc15.i686.img
--------------------------------------------------------------------------------
=================== sda3: Location of files loaded by Grub: ====================
GiB - GB File Fragment(s)
97.915327072 = 105.135781888 grub/grub.conf 1
97.915327072 = 105.135781888 grub/menu.lst 1
97.915444374 = 105.135907840 grub/stage2 1
97.687784195 = 104.891459584 initramfs-2.6.38.6-26.rc1.fc15.i686.img 4
97.676396370 = 104.879232000 vmlinuz-2.6.38.6-26.rc1.fc15.i686 1
================= sda3: Location of files loaded by Syslinux: ==================
GiB - GB File Fragment(s)
97.665584564 = 104.867622912 extlinux/cat.c32 1
97.665656090 = 104.867699712 extlinux/chain.c32 1
97.670896530 = 104.873326592 extlinux/cmd.c32 1
97.665577888 = 104.867615744 extlinux/config.c32 1
97.666419029 = 104.868518912 extlinux/cpuid.c32 1
97.670682907 = 104.873097216 extlinux/cpuidtest.c32 1
97.665695190 = 104.867741696 extlinux/disk.c32 1
97.666396141 = 104.868494336 extlinux/dmitest.c32 1
97.665980339 = 104.868047872 extlinux/elf.c32 1
97.666460037 = 104.868562944 extlinux/ethersel.c32 1
97.666029930 = 104.868101120 extlinux/gfxboot.c32 1
97.666282654 = 104.868372480 extlinux/gpxecmd.c32 1
97.665952682 = 104.868018176 extlinux/hdt.c32 1
97.665596962 = 104.867636224 extlinux/host.c32 1
97.670685768 = 104.873100288 extlinux/ifcpu64.c32 1
97.666277885 = 104.868367360 extlinux/ifcpu.c32 1
97.666431427 = 104.868532224 extlinux/ifplop.c32 1
97.665988922 = 104.868057088 extlinux/kbdmap.c32 1
97.666413307 = 104.868512768 extlinux/linux.c32 1
97.666428566 = 104.868529152 extlinux/ls.c32 1
97.666255951 = 104.868343808 extlinux/lua.c32 1
97.665689468 = 104.867735552 extlinux/mboot.c32 1
97.666261673 = 104.868349952 extlinux/meminfo.c32 1
97.666345596 = 104.868440064 extlinux/menu.c32 1
97.670742989 = 104.873161728 extlinux/pcitest.c32 1
97.666361809 = 104.868457472 extlinux/pmload.c32 1
97.666348457 = 104.868443136 extlinux/pwd.c32 1
97.666279793 = 104.868369408 extlinux/reboot.c32 1
97.666008949 = 104.868078592 extlinux/rosh.c32 1
97.665983200 = 104.868050944 extlinux/sanboot.c32 1
97.670711517 = 104.873127936 extlinux/sdi.c32 1
97.665637016 = 104.867679232 extlinux/sysdump.c32 1
97.665572166 = 104.867609600 extlinux/vesainfo.c32 1
97.670895576 = 104.873325568 extlinux/vesamenu.c32 1
97.665591240 = 104.867630080 extlinux/vpdtest.c32 1
97.670899391 = 104.873329664 extlinux/whichsys.c32 1
============== sda3: Version of COM32(R) files used by Syslinux: ===============
extlinux/cat.c32 : COM32R module (v4.xx)
extlinux/chain.c32 : COM32R module (v4.xx)
extlinux/cmd.c32 : COM32R module (v4.xx)
extlinux/config.c32 : COM32R module (v4.xx)
extlinux/cpuid.c32 : COM32R module (v4.xx)
extlinux/cpuidtest.c32 : COM32R module (v4.xx)
extlinux/disk.c32 : COM32R module (v4.xx)
extlinux/dmitest.c32 : COM32R module (v4.xx)
extlinux/elf.c32 : COM32R module (v4.xx)
extlinux/ethersel.c32 : COM32R module (v4.xx)
extlinux/gfxboot.c32 : COM32R module (v4.xx)
extlinux/gpxecmd.c32 : COM32R module (v4.xx)
extlinux/hdt.c32 : COM32R module (v4.xx)
extlinux/host.c32 : COM32R module (v4.xx)
extlinux/ifcpu64.c32 : COM32R module (v4.xx)
extlinux/ifcpu.c32 : COM32R module (v4.xx)
extlinux/ifplop.c32 : COM32R module (v4.xx)
extlinux/kbdmap.c32 : COM32R module (v4.xx)
extlinux/linux.c32 : COM32R module (v4.xx)
extlinux/ls.c32 : COM32R module (v4.xx)
extlinux/lua.c32 : COM32R module (v4.xx)
extlinux/mboot.c32 : COM32R module (v4.xx)
extlinux/meminfo.c32 : COM32R module (v4.xx)
extlinux/menu.c32 : COM32R module (v4.xx)
extlinux/pcitest.c32 : COM32R module (v4.xx)
extlinux/pmload.c32 : COM32R module (v4.xx)
extlinux/pwd.c32 : COM32R module (v4.xx)
extlinux/reboot.c32 : COM32R module (v4.xx)
extlinux/rosh.c32 : COM32R module (v4.xx)
extlinux/sanboot.c32 : COM32R module (v4.xx)
extlinux/sdi.c32 : COM32R module (v4.xx)
extlinux/sysdump.c32 : COM32R module (v4.xx)
extlinux/vesainfo.c32 : COM32R module (v4.xx)
extlinux/vesamenu.c32 : COM32R module (v4.xx)
extlinux/vpdtest.c32 : COM32R module (v4.xx)
extlinux/whichsys.c32 : COM32R module (v4.xx)
=========================== sdb1/boot/grub/grub.cfg: ===========================
--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
set locale_dir=($root)/boot/grub/locale
set lang=en_US
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
play 480 440 1
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root=(hd0,msdos1)
linux /boot/vmlinuz-2.6.38-8-generic root=/dev/sda1 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.38-8-generic
}
menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root=(hd0,msdos1)
echo 'Loading Linux 2.6.38-8-generic ...'
linux /boot/vmlinuz-2.6.38-8-generic root=/dev/sda1 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.38-8-generic
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos1)'
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Fedora (2.6.38.6-26.rc1.fc15.i686) (on /dev/mapper/vg_sbc2dev1-lv_root)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(/dev/sda,msdos3)'
linux /vmlinuz-2.6.38.6-26.rc1.fc15.i686 ro root=/dev/mapper/vg_sbc2dev1-lv_root rd_LVM_LV=vg_sbc2dev1/lv_root rd_LVM_LV=vg_sbc2dev1/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
initrd /initramfs-2.6.38.6-26.rc1.fc15.i686.img
}
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
--------------------------------------------------------------------------------
=================== sdb1: Location of files loaded by Grub: ====================
GiB - GB File Fragment(s)
2.255947113 = 2.422304768 boot/grub/core.img 1
2.258811951 = 2.425380864 boot/grub/grub.cfg 1
0.141601562 = 0.152043520 boot/initrd.img-2.6.38-8-generic 2
2.255187988 = 2.421489664 boot/vmlinuz-2.6.38-8-generic 1
========================== sdc/syslinux/syslinux.cfg: ==========================
--------------------------------------------------------------------------------
# D-I config version 2.0
include menu.cfg
default vesamenu.c32
prompt 0
timeout 50
# If you would like to use the new menu and be presented with the option to install or run from USB at startup, remove # from the following line. This line was commented out (by request of many) to allow the old menu to be presented and to enable booting straight into the Live Environment!
# ui gfxboot bootlogo
--------------------------------------------------------------------------------
================== sdc: Location of files loaded by Syslinux: ==================
GiB - GB File Fragment(s)
?? = ?? ldlinux.sys 1
?? = ?? syslinux/gfxboot.c32 1
?? = ?? syslinux/syslinux.cfg 1
?? = ?? syslinux/vesamenu.c32 1
=============== sdc: Version of COM32(R) files used by Syslinux: ===============
syslinux/gfxboot.c32 : COM32R module (v4.xx)
syslinux/vesamenu.c32 : COM32R module (v4.xx)
======================== Unknown MBRs/Boot Sectors/etc: ========================
Unknown BootLoader on vg_sbc2dev1-lv_swap'

Unknown BootLoader on vg_sbc2dev1-lv_home'

Unknown BootLoader on vg_sbc2dev1-lv_root'

=============================== StdErr Messages: ===============================
unlzma: Decoder error
unlzma: Decoder error
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
hexdump: /dev/mapper/vg_sbc2dev1-lv_swap': No such file or directory
hexdump: /dev/mapper/vg_sbc2dev1-lv_swap': No such file or directory
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
hexdump: /dev/mapper/vg_sbc2dev1-lv_home': No such file or directory
hexdump: /dev/mapper/vg_sbc2dev1-lv_home': No such file or directory
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
One or more specified logical volume(s) not found.
hexdump: /dev/mapper/vg_sbc2dev1-lv_root': No such file or directory
hexdump: /dev/mapper/vg_sbc2dev1-lv_root': No such file or directory
/media/PENDRIVE/boot_info_script.sh: line 1579: [: 2.73495e+09: integer expression expected

[oldfred]

I do not see anything major wrong. It looks like it installed grub2's boot loader to the MBR & core.img to the first sector & it is correctly looking into sda1.

But sda1 looks like it is missing core.img.

My entry:

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 11.04
Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img


It also looks like the os-prober found your Fedora install and added it to the boot menu.

You could try just copying core.img, but I think it may be better just to purge & reinstall grub2.
HOWTO: Purge and Reinstall Grub 2 from the Live CD
http://ubuntuforums.org/showthread.php?t=1581099

[jmartinosky]

Thank you all for your help. I can't say exactly which thing got me over the hump, but it's working now. It's very much appreciated.

[YesWeCan]

This may be moot but there are some things that are confusing me.

I'm attempting to install Ubuntu 11.04 onto a 4GB SATA DOM, from a running installation of 11.04, which is installed on the hard drive. Installation was made from a flash drive.
According to bootinfoscript your DOM is 8GB and is sdb. But this is when you are booting from the 500GB drive, I assume. When you boot from the DOM it will be sda. According to bootinfoscript the DOM has Grub files but is missing the OS files. Just thought I'd point that out.