Certainly not the case with me. The root=/dev/sdc1 on the linux line overrides
whatever the search UUID did. I just did a fresh install from a 2G usb stick
created on a Maverick system with the normal desktop iso, to a 4G new pqi
stick. I captured the grub.cfg (bad), fstab (OK), and the /var/log files in
case you needed them. The first boot attempt fell into BusyBox after about a
minute with the following error:
Gave up waiting for root device. Common problems:
-Boot args (cat /proc/cmdline)
-check rootdelay= (did the system wait long enough?)
-check root= (did the system wait for the right device?) <<<<<<NO IT DIDN'T
-Missing modules (cat /proc/modules; ls /dev
ALERT! /dev/sdc1 does not exist - Dropping to a shell
BusyBox v1.15.3 (ubuntu 1:1.15.3-1ubuntu5) built-in shell (ash)
Enter 'help' for a list of built-in commands
(initramfs)_
cat /proc/cmdline gives:
BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=/dev/sdc1 ro quiet splash
The modules were:
usb_storage firewire_ohci, firesire_core, pata_amd, forcedeth, sdhci_pci,
ac_itu_t, sdhci, sata_nv, led_class, ssb
The /dev directory contained sg0, sda, sda1, sda2, sda3 (the Windows disk),
sg1, sdb, sdb1 (the 4G stick failing to boot)
and no sdc.
I select manual partition selection, select the sdc1, format an ext2 fs,
no swap, the grub boot goes to the 4G stick on sdc (default after I
select the sdc disk). The only disks shown are sda( the windows disk),
and sdc(the target). sdb is the 2G install usb, and correctly is not a
choice.
The original grub.cfg file created on the target, before any boot attempt is:
#
# 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 "${boot_once}" ]; then save_env
recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
}
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### 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
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sdc1 ro quiet splash
initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu
--class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
echo 'Loading Linux 2.6.35-22-generic ...'
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sdc1 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-22-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='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
insmod part_msdos
insmod ntfs#
# 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 "${boot_once}" ]; then save_env
recordfail; fi; fi
}
function load_video {
insmod vbe
insmod vga
}
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### 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
### END /etc/grub.d/05_debian_theme ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sdc1 ro quiet splash
initrd /boot/initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu
--class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
echo 'Loading Linux 2.6.35-22-generic ...'
linux /boot/vmlinuz-2.6.35-22-generic root=/dev/sdc1 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-22-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='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd2,msdos1)'
search --no-floppy --fs-uuid --set 0ddfb60a-4791-45c9-85ec-c13c42c459af
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda1)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 637d775958635993
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry "Windows NT/2000/XP (on /dev/sda2)" {
insmod part_msdos
insmod fat
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set 3ec6-2e70
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry "Microsoft Windows XP Embedded (on /dev/sda3)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos3)'
search --no-floppy --fs-uuid --set 60d45d0ed45ce834
drivemap -s (hd0) ${root}
chainloader +1
}
### 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 ###
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 637d775958635993
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry "Windows NT/2000/XP (on /dev/sda2)" {
insmod part_msdos
insmod fat
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set 3ec6-2e70
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry "Microsoft Windows XP Embedded (on /dev/sda3)" {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos3)'
search --no-floppy --fs-uuid --set 60d45d0ed45ce834
drivemap -s (hd0) ${root}
chainloader +1
}
### 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 ###
--
Grub Installer gets devices wrong when running from live USB
https://bugs.launchpad.net/bugs/384633
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