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#1 2015-08-16 00:10:10

shing20
Member
Registered: 2015-08-15
Posts: 4

[SOLVED] Unable to find root partition at boot GRUB with LVM

hello i've been reading a lot of topics here of people having same problem that i have, but i can't solve it

i post here my configuration files:

  • /etc/fstab:

    # /dev/mapper/server-lvroot
UUID=55463e03-43f5-44a7-a463-1710f99bb64d	/         	ext4      	rw,relatime,data=ordered	0 1

# /dev/sda2
UUID=392bce84-ffd4-4c07-bbf4-908d4510c207	/boot     	ext2      	rw,relatime,stripe=4	0 2

# /dev/mapper/server-lvtmp
UUID=f42ade34-d78a-439c-be9d-a46ffb997095	/tmp      	ext4      	rw,relatime,stripe=4,data=ordered	0 2

# /dev/mapper/server-lvvar
UUID=7f7de471-3485-4d3d-a0f9-81769ef7b791	/var      	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvvar--log
UUID=ef134194-c88d-4e69-9e2b-e0cdd2030d8d	/var/log  	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvapache
UUID=931f71ff-98ca-4bed-90ad-630c3e6df329	/var/http 	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvmysql
UUID=6cbf4d2a-cbf0-4806-bf15-e4ad5663126e	/var/lib/mysql	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvtomcat--webapp
UUID=8316c574-6670-4dd0-b358-02b2c83c8734	/var/lib/tomcat8	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvtomcat--data
UUID=9883ee9a-93d8-4a8b-9e9d-35b26ddcb968	/var/tmp/tomcat8	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvhome
UUID=2925d540-6cf1-4ef3-b336-847c2c47a1bc	/home     	ext4      	rw,relatime,data=ordered	0 2

# /dev/mapper/server-lvswap
UUID=ef61b5e0-bb72-4386-8cdb-8a091aaf42cc	none      	swap      	defaults  	0 0

  • /etc/default/grub:

    GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="Arch"
GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/server-root quiet"
GRUB_CMDLINE_LINUX=""

# Preload both GPT and MBR modules so that they are not missed
GRUB_PRELOAD_MODULES="lvm part_gpt part_msdos"

# Uncomment to enable Hidden Menu, and optionally hide the timeout count
#GRUB_HIDDEN_TIMEOUT=5
#GRUB_HIDDEN_TIMEOUT_QUIET=true

# Uncomment to use basic console
GRUB_TERMINAL_INPUT=console

# Uncomment to disable graphical terminal
#GRUB_TERMINAL_OUTPUT=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
GRUB_GFXMODE=auto

# Uncomment to allow the kernel use the same resolution used by grub
GRUB_GFXPAYLOAD_LINUX=keep

# Uncomment if you want GRUB to pass to the Linux kernel the old parameter 
# format "root=/dev/xxx" instead of "root=/dev/disk/by-uuid/xxx" 
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
GRUB_DISABLE_RECOVERY=true

# Uncomment and set to the desired menu colors.  Used by normal and wallpaper 
# modes only.  Entries specified as foreground/background.
#GRUB_COLOR_NORMAL="light-blue/black"
#GRUB_COLOR_HIGHLIGHT="light-cyan/blue"

# Uncomment one of them for the gfx desired, a image background or a gfxtheme
#GRUB_BACKGROUND="/path/to/wallpaper"
#GRUB_THEME="/path/to/gfxtheme"

# Uncomment to get a beep at GRUB start
#GRUB_INIT_TUNE="480 440 1"

#GRUB_SAVEDEFAULT="true"
GRUB_DISSABLE_SUBMENU=y

  • /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 ###
insmod lvm
insmod part_gpt
insmod part_msdos
if [ -s $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

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$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt gpt 
insmod lvm 
insmod ext2
set root='lvmid/LZVz8u-l5ue-u7Sf-3KeW-8eej-wzJM-Aj3wHV/7vHIJX-ZRFu-ulaD-DNkw-a22K-snb4-Rw5XRH'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint='lvmid/LZVz8u-l5ue-u7Sf-3KeW-8eej-wzJM-Aj3wHV/7vHIJX-ZRFu-ulaD-DNkw-a22K-snb4-Rw5XRH'  55463e03-43f5-44a7-a463-1710f99bb64d
else
  search --no-floppy --fs-uuid --set=root 55463e03-43f5-44a7-a463-1710f99bb64d
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_input console
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=5
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=5
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Arch Linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-55463e03-43f5-44a7-a463-1710f99bb64d' {
	load_video
	set gfxpayload=keep
	insmod gzio
	insmod part_gpt 
	insmod lvm
	insmod ext2
	set root='hd0,gpt2'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  392bce84-ffd4-4c07-bbf4-908d4510c207
	else
	  search --no-floppy --fs-uuid --set=root 392bce84-ffd4-4c07-bbf4-908d4510c207
	fi
	echo	'Loading Linux linux ...'
	linux	/vmlinuz-linux root=UUID=55463e03-43f5-44a7-a463-1710f99bb64d rw root=/dev/mapper/server-root quiet
	echo	'Loading initial ramdisk ...'
	initrd	 /initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-55463e03-43f5-44a7-a463-1710f99bb64d' {
	menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-55463e03-43f5-44a7-a463-1710f99bb64d' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt 
		insmod lvm
		insmod ext2
		set root='hd0,gpt2'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  392bce84-ffd4-4c07-bbf4-908d4510c207
		else
		  search --no-floppy --fs-uuid --set=root 392bce84-ffd4-4c07-bbf4-908d4510c207
		fi
		echo	'Loading Linux linux ...'
		linux	/vmlinuz-linux root=UUID=55463e03-43f5-44a7-a463-1710f99bb64d rw root=/dev/mapper/server-root quiet
		echo	'Loading initial ramdisk ...'
		initrd	 /initramfs-linux.img
	}
	menuentry 'Arch Linux, with Linux linux (fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-fallback-55463e03-43f5-44a7-a463-1710f99bb64d' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt 
		insmod lvm
		insmod ext2
		set root='hd0,gpt2'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  392bce84-ffd4-4c07-bbf4-908d4510c207
		else
		  search --no-floppy --fs-uuid --set=root 392bce84-ffd4-4c07-bbf4-908d4510c207
		fi
		echo	'Loading Linux linux ...'
		linux	/vmlinuz-linux root=UUID=55463e03-43f5-44a7-a463-1710f99bb64d rw root=/dev/mapper/server-root quiet
		echo	'Loading initial ramdisk ...'
		initrd	 /initramfs-linux-fallback.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/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 ###

### BEGIN /etc/grub.d/60_memtest86+ ###
### END /etc/grub.d/60_memtest86+ ###

  • partition scheme:

    NAME                        FSTYPE LABEL UUID MOUNTPOINT
sda                                           
|-sda1                                        
|-sda2                                        /boot
`-sda3                                        
  |-server-lvswap                             
  |-server-lvroot                             /
  |-server-lvtmp                              /tmp
  |-server-lvvar                              /var
  |-server-lvvar--log                         /var/log
  |-server-lvhome                             /var/log
  `-server-lvapache                           /var/http
sdb                                           
`-sdb1                                        
  |-server-lvmysql                            /var/lib/mysql
  |-server-lvtomcat--webapp                   /var/lib/tomcat8
  `-server-lvtomcat--data                     /var/tmp/tomcat8

Last edited by shing20 (2015-08-19 04:17:46)

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#2 2015-08-16 00:27:10

Rethil
Member
Registered: 2014-08-21
Posts: 83

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

1. About separate /tmp partition, you might want to check
https://wiki.archlinux.org/index.php/Tmpfs

2. Try changing

GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/server-root quiet"

to

GRUB_CMDLINE_LINUX_DEFAULT="root=UUID=55463e03-43f5-44a7-a463-1710f99bb64d quiet"

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#3 2015-08-16 16:32:11

shing20
Member
Registered: 2015-08-15
Posts: 4

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

Rethil wrote:

1. About separate /tmp partition, you might want to check
https://wiki.archlinux.org/index.php/Tmpfs

2. Try changing

GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/server-root quiet"

to

GRUB_CMDLINE_LINUX_DEFAULT="root=UUID=55463e03-43f5-44a7-a463-1710f99bb64d quiet"

Thanks, I tried it but didn't work, at boot say:

ERROR: device 'UUID=....' not found. skipping fsck
ERROR: Unable to find root device 'UUID=....'

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#4 2015-08-16 18:54:41

boban_dj
Member
Registered: 2015-03-17
Posts: 150

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

Why your fstab has: 

# /dev/mapper/server-lvroot

and grub has : 

GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/server-root quiet"

server-lvroot <> server-root

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#5 2015-08-17 05:05:55

shing20
Member
Registered: 2015-08-15
Posts: 4

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

boban_dj wrote:

Why your fstab has: 

# /dev/mapper/server-lvroot

and grub has : 

GRUB_CMDLINE_LINUX_DEFAULT="root=/dev/mapper/server-root quiet"

server-lvroot <> server-root

Yes, my mistake, i've corrected that but still having that problem

Thanks!

BTW: when i run grub-mkconfig -o /boot/grub/grub.cfg it gives me an error that say something like squashfs: SQUASHFS error; can't find a SQUASHFS superblock on sda1
EXT4-fs (sda1)....

Last edited by shing20 (2015-08-17 05:11:04)

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#6 2015-08-17 12:19:08

boban_dj
Member
Registered: 2015-03-17
Posts: 150

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

Hi,
did you set in 

 /etc/lvm/lvm.conf

to 

use_lvmetad=1

then run 

mkinitcpio -p linux

and mkconfig grub again.

What is you mkinitcpio.conf?
I have in MODULES=dm_mod and also in HOOKS= lvm2 (between block and filesystems)

In my 

GRUB_CMDLINE_LINUX="root=/dev/mapper/VolGroup00-lvolroot"

where 

tree /dev/mapper
/dev/mapper/
├── control
├── VolGroup00-lvolboot -> ../dm-0
├── VolGroup00-lvolhome -> ../dm-3
├── VolGroup00-lvolroot -> ../dm-2
└── VolGroup00-lvolswap -> ../dm-1

After I enable 

systemctl enable lvm2-lvmetad.service

Let me know if this works, cause I tried it on Vbox

Last edited by boban_dj (2015-08-17 12:20:59)

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#7 2015-08-17 17:18:40

shing20
Member
Registered: 2015-08-15
Posts: 4

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

boban_dj wrote:

Hi,
did you set in 

 /etc/lvm/lvm.conf

to 

use_lvmetad=1

then run 

mkinitcpio -p linux

and mkconfig grub again.

What is you mkinitcpio.conf?
I have in MODULES=dm_mod and also in HOOKS= lvm2 (between block and filesystems)

In my 

GRUB_CMDLINE_LINUX="root=/dev/mapper/VolGroup00-lvolroot"

where 

tree /dev/mapper
/dev/mapper/
├── control
├── VolGroup00-lvolboot -> ../dm-0
├── VolGroup00-lvolhome -> ../dm-3
├── VolGroup00-lvolroot -> ../dm-2
└── VolGroup00-lvolswap -> ../dm-1

After I enable 

systemctl enable lvm2-lvmetad.service

Let me know if this works, cause I tried it on Vbox

it worked fine! i've added dm_mod to mkinitcpio.conf and enabled lvm2-lvmetad

Thanks to all! smile

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#8 2015-08-17 18:34:25

boban_dj
Member
Registered: 2015-03-17
Posts: 150

Re: [SOLVED] Unable to find root partition at boot GRUB with LVM

edit your post with [SOLVED} in the title

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