Re: F16>F17: F17 can't find root by uuid - which exists!

[sean darcy <seandarcy2@xxxxxxxxx>]

On 08/26/2012 02:10 PM, Heinz Diehl wrote:
> On 26.08.2012, sean darcy wrote:
>
> > Not sure how to do this, since it won't boot. I'll try to email out of a
> > Live boot.
>
> You can e.g. use sysresccd. Download an image here:
>
>   http://www.sysresccd.org
>
> You could e.g. run isohybrid on the image and copy it to an USB memory
> stick and boot from it afterwards:
>
>   isohybrid image.iso
>   cat image.iso > /dev/sdX
>
> And you are ready to go.

Did it slightly differently. Booted up the F17 Live cd. Then ran blkid 
and cat'd grub.cfg. But will download sysresccd. Looks like a better way.

> [liveuser@localhost ~]$ blkid /dev/sda2
> /dev/sda2: LABEL="root" UUID="89afb6ff-4fb2-4602-94b5-99dbf022b100" TYPE="ext4"
>
> cat /run/media/liveuser/boot/grub2/grub.cfg
>
> #
> # DO NOT EDIT THIS FILE
> #
> # It is automatically generated by grub2-mkconfig using templates
> # from /etc/grub.d and settings from /etc/default/grub
> #
>
> ### BEGIN /etc/grub.d/00_header ###
> if [ -s $prefix/grubenv ]; then
>   load_env
> fi
> set default="${saved_entry}"
>
> if [ x"${feature_menuentry_id}" = xy ]; then
>   menuentry_id_option="--id"
> else
>   menuentry_id_option=""
> fi
>
> export menuentry_id_option
>
> if [ "${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="${chosen}"
>     save_env saved_entry
>   fi
> }
>
> function load_video {
>   if [ x$feature_all_video_module = xy ]; then
>     insmod all_video
>   else
>     insmod efi_gop
>     insmod efi_uga
>     insmod ieee1275_fb
>     insmod vbe
>     insmod vga
>     insmod video_bochs
>     insmod video_cirrus
>   fi
> }
>
> if [ x$feature_default_font_path = xy ] ; then
>    font=unicode
> else
> insmod part_msdos
> insmod ext2
> set root='hd0,msdos2'
> if [ x$feature_platform_search_hint = xy ]; then
>   search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'  89afb6ff-4fb2-4602-94b5-99dbf022b100
> else
>   search --no-floppy --fs-uuid --set=root 89afb6ff-4fb2-4602-94b5-99dbf022b100
> fi
>     font="/usr/share/grub/unicode.pf2"
> fi
>
> if loadfont $font ; then
>   set gfxmode=auto
>   load_video
>   insmod gfxterm
>   set locale_dir=$prefix/locale
>   set lang=en_US
>   insmod gettext
> fi
> terminal_output gfxterm
> set timeout=5
> ### END /etc/grub.d/00_header ###
>
> ### BEGIN /etc/grub.d/10_linux ###
> menuentry 'Fedora' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 	load_video
> 	set gfxpayload=keep
> 	insmod gzio
> 	insmod part_msdos
> 	insmod ext2
> 	set root='hd0,msdos1'
> 	if [ x$feature_platform_search_hint = xy ]; then
> 	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 	else
> 	  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 	fi
> 	echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 	linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 	echo	'Loading initial ramdisk ...'
> 	initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> }
> submenu 'Advanced options for Fedora' $menuentry_id_option 'gnulinux-advanced-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 	menuentry 'Fedora, with Linux 3.5.2-3.fc17.x86_64' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.2-3.fc17.x86_64-advanced-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 		load_video
> 		set gfxpayload=keep
> 		insmod gzio
> 		insmod part_msdos
> 		insmod ext2
> 		set root='hd0,msdos1'
> 		if [ x$feature_platform_search_hint = xy ]; then
> 		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		else
> 		  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		fi
> 		echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 		linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 		echo	'Loading initial ramdisk ...'
> 		initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> 	}
> 	menuentry 'Fedora, with Linux 3.5.2-3.fc17.x86_64 (recovery mode)' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.2-3.fc17.x86_64-recovery-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 		load_video
> 		set gfxpayload=keep
> 		insmod gzio
> 		insmod part_msdos
> 		insmod ext2
> 		set root='hd0,msdos1'
> 		if [ x$feature_platform_search_hint = xy ]; then
> 		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		else
> 		  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		fi
> 		echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 		linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro single rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 		echo	'Loading initial ramdisk ...'
> 		initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> 	}
> }
>
> ### 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_ppc_terminfo ###
> ### END /etc/grub.d/20_ppc_terminfo ###
>
> ### BEGIN /etc/grub.d/30_os-prober ###
> ### 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  ${config_directory}/custom.cfg ]; then
>   source ${config_directory}/custom.cfg
> elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
>   source $prefix/custom.cfg;
> fi
> ### END /etc/grub.d/41_custom ###
> [root@jay-samsung sdb1]# cat output
> [liveuser@localhost ~]$ blkid /dev/sda2
> /dev/sda2: LABEL="root" UUID="89afb6ff-4fb2-4602-94b5-99dbf022b100" TYPE="ext4"
>
> cat /run/media/liveuser/boot/grub2/grub.cfg
>
> #
> # DO NOT EDIT THIS FILE
> #
> # It is automatically generated by grub2-mkconfig using templates
> # from /etc/grub.d and settings from /etc/default/grub
> #
>
> ### BEGIN /etc/grub.d/00_header ###
> if [ -s $prefix/grubenv ]; then
>   load_env
> fi
> set default="${saved_entry}"
>
> if [ x"${feature_menuentry_id}" = xy ]; then
>   menuentry_id_option="--id"
> else
>   menuentry_id_option=""
> fi
>
> export menuentry_id_option
>
> if [ "${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="${chosen}"
>     save_env saved_entry
>   fi
> }
>
> function load_video {
>   if [ x$feature_all_video_module = xy ]; then
>     insmod all_video
>   else
>     insmod efi_gop
>     insmod efi_uga
>     insmod ieee1275_fb
>     insmod vbe
>     insmod vga
>     insmod video_bochs
>     insmod video_cirrus
>   fi
> }
>
> if [ x$feature_default_font_path = xy ] ; then
>    font=unicode
> else
> insmod part_msdos
> insmod ext2
> set root='hd0,msdos2'
> if [ x$feature_platform_search_hint = xy ]; then
>   search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 --hint='hd0,msdos2'  89afb6ff-4fb2-4602-94b5-99dbf022b100
> else
>   search --no-floppy --fs-uuid --set=root 89afb6ff-4fb2-4602-94b5-99dbf022b100
> fi
>     font="/usr/share/grub/unicode.pf2"
> fi
>
> if loadfont $font ; then
>   set gfxmode=auto
>   load_video
>   insmod gfxterm
>   set locale_dir=$prefix/locale
>   set lang=en_US
>   insmod gettext
> fi
> terminal_output gfxterm
> set timeout=5
> ### END /etc/grub.d/00_header ###
>
> ### BEGIN /etc/grub.d/10_linux ###
> menuentry 'Fedora' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 	load_video
> 	set gfxpayload=keep
> 	insmod gzio
> 	insmod part_msdos
> 	insmod ext2
> 	set root='hd0,msdos1'
> 	if [ x$feature_platform_search_hint = xy ]; then
> 	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 	else
> 	  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 	fi
> 	echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 	linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 	echo	'Loading initial ramdisk ...'
> 	initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> }
> submenu 'Advanced options for Fedora' $menuentry_id_option 'gnulinux-advanced-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 	menuentry 'Fedora, with Linux 3.5.2-3.fc17.x86_64' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.2-3.fc17.x86_64-advanced-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 		load_video
> 		set gfxpayload=keep
> 		insmod gzio
> 		insmod part_msdos
> 		insmod ext2
> 		set root='hd0,msdos1'
> 		if [ x$feature_platform_search_hint = xy ]; then
> 		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		else
> 		  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		fi
> 		echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 		linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 		echo	'Loading initial ramdisk ...'
> 		initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> 	}
> 	menuentry 'Fedora, with Linux 3.5.2-3.fc17.x86_64 (recovery mode)' --class fedora --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.2-3.fc17.x86_64-recovery-89afb6ff-4fb2-4602-94b5-99dbf022b100' {
> 		load_video
> 		set gfxpayload=keep
> 		insmod gzio
> 		insmod part_msdos
> 		insmod ext2
> 		set root='hd0,msdos1'
> 		if [ x$feature_platform_search_hint = xy ]; then
> 		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1'  8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		else
> 		  search --no-floppy --fs-uuid --set=root 8a6ce784-d86f-4450-89f1-1aaea04e6bc9
> 		fi
> 		echo	'Loading Linux 3.5.2-3.fc17.x86_64 ...'
> 		linux	/vmlinuz-3.5.2-3.fc17.x86_64 root=UUID=89afb6ff-4fb2-4602-94b5-99dbf022b100 ro single rd.md=0 rd.lvm=0 rd.dm=0 SYSFONT=latarcyrheb-sun16  KEYTABLE=us rd.luks=0 LANG=en_US.UTF-8
> 		echo	'Loading initial ramdisk ...'
> 		initrd	/initramfs-3.5.2-3.fc17.x86_64.img
> 	}
> }
>
> ### 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_ppc_terminfo ###
> ### END /etc/grub.d/20_ppc_terminfo ###
>
> ### BEGIN /etc/grub.d/30_os-prober ###
> ### 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  ${config_directory}/custom.cfg ]; then
>   source ${config_directory}/custom.cfg
> elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
>   source $prefix/custom.cfg;
> fi
> ### END /etc/grub.d/41_custom ###

sean


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