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#1 2016-01-12 15:33:37

lsas
Member
Registered: 2010-11-23
Posts: 23

ERROR: Unable to find root device UUID - LVM RAID

Hello everyone.

I've just executed a pacman -Syu and at the reboot i've got this error:
ERROR: Unable to find root device 'UUID=c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6'.
You are being dropped to a recovery shell

Basically i've two 3TB HDD with RAID1 and LVM on top: on the array is builded a volumegroup with inside 4 logicalvolume boot root storage and swap.

Actually i cant post my config file cause i'm chroot with arch usb install media and cant copy and paste..

I've tried to recreat initram image while chrooted with mkinitcpio -p linux
The command reports no error and everithing seems fine but at the reboot same error appear.


Any ideas?
Meanwhile i'll try to figure out how to copy/paste

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#2 2016-01-12 15:55:20

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 19,772

Re: ERROR: Unable to find root device UUID - LVM RAID

You may want to investigate https://www.archlinux.org/packages/comm … wgetpaste/

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

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#3 2016-01-12 16:26:59

lsas
Member
Registered: 2010-11-23
Posts: 23

Re: ERROR: Unable to find root device UUID - LVM RAID

Well thanks for the tip.

Here's some config files..

/etc/mkinitcpio.conf :

# MODULES
# The following modules are loaded before any boot hooks are
# run.  Advanced users may wish to specify all system modules
# in this array.  For instance:
#     MODULES="piix ide_disk reiserfs"
MODULES="dm_mod"

# BINARIES
# This setting includes any additional binaries a given user may
# wish into the CPIO image.  This is run last, so it may be used to
# override the actual binaries included by a given hook
# BINARIES are dependency parsed, so you may safely ignore libraries
BINARIES=""

# FILES
# This setting is similar to BINARIES above, however, files are added
# as-is and are not parsed in any way.  This is useful for config files.
FILES=""

# HOOKS
# This is the most important setting in this file.  The HOOKS control the
# modules and scripts added to the image, and what happens at boot time.
# Order is important, and it is recommended that you do not change the
# order in which HOOKS are added.  Run 'mkinitcpio -H <hook name>' for
# help on a given hook.
# 'base' is _required_ unless you know precisely what you are doing.
# 'udev' is _required_ in order to automatically load modules
# 'filesystems' is _required_ unless you specify your fs modules in MODULES
# Examples:
##   This setup specifies all modules in the MODULES setting above.
##   No raid, lvm2, or encrypted root is needed.
#    HOOKS="base"
#
##   This setup will autodetect all modules for your system and should
##   work as a sane default
#    HOOKS="base udev autodetect block filesystems"
#
##   This setup will generate a 'full' image which supports most systems.
##   No autodetection is done.
#    HOOKS="base udev block filesystems"
#
##   This setup assembles a pata mdadm array with an encrypted root FS.
##   Note: See 'mkinitcpio -H mdadm' for more information on raid devices.
#    HOOKS="base udev block mdadm encrypt filesystems"
#
##   This setup loads an lvm2 volume group on a usb device.
#    HOOKS="base udev block lvm2 filesystems"
#
##   NOTE: If you have /usr on a separate partition, you MUST include the
#    usr, fsck and shutdown hooks.
HOOKS="base udev mdadm_udev autodetect modconf block lvm2 filesystems keyboard fsck"

# COMPRESSION
# Use this to compress the initramfs image. By default, gzip compression
# is used. Use 'cat' to create an uncompressed image.
#COMPRESSION="gzip"
#COMPRESSION="bzip2"
#COMPRESSION="lzma"
#COMPRESSION="xz"
#COMPRESSION="lzop"
#COMPRESSION="lz4"

# COMPRESSION_OPTIONS
# Additional options for the compressor
#COMPRESSION_OPTIONS=""

/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 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$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt gpt 
insmod diskfilter mdraid1x lvm 
insmod ext2
set root='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/Z2eotR-N0HN-nroI-3hUd-odMB-GzHy-4PrsnL'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/Z2eotR-N0HN-nroI-3hUd-odMB-GzHy-4PrsnL'  c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6
else
  search --no-floppy --fs-uuid --set=root c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6
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 $menuentry_id_option 'gnulinux-simple-c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6' {
	load_video
	set gfxpayload=keep
	insmod gzio
	insmod part_gpt gpt 
	insmod diskfilter mdraid1x lvm 
	insmod ext2
	set root='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'  1fffa9ae-ea36-4888-870e-47bd8fc16268
	else
	  search --no-floppy --fs-uuid --set=root 1fffa9ae-ea36-4888-870e-47bd8fc16268
	fi
	echo	'Loading Linux linux ...'
	linux	/vmlinuz-linux root=UUID=c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6 rw  quiet
	echo	'Loading initial ramdisk ...'
	initrd	 /initramfs-linux.img
}
submenu 'Advanced options for Arch Linux' $menuentry_id_option 'gnulinux-advanced-c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6' {
	menuentry 'Arch Linux, with Linux linux' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-linux-advanced-c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt gpt 
		insmod diskfilter mdraid1x lvm 
		insmod ext2
		set root='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'  1fffa9ae-ea36-4888-870e-47bd8fc16268
		else
		  search --no-floppy --fs-uuid --set=root 1fffa9ae-ea36-4888-870e-47bd8fc16268
		fi
		echo	'Loading Linux linux ...'
		linux	/vmlinuz-linux root=UUID=c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6 rw  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 $menuentry_id_option 'gnulinux-linux-fallback-c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6' {
		load_video
		set gfxpayload=keep
		insmod gzio
		insmod part_gpt gpt 
		insmod diskfilter mdraid1x lvm 
		insmod ext2
		set root='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint='lvmid/caoMWu-o417-GMgH-6vFj-1qrv-iJMi-ypwm0f/3Z70U8-Mc1W-aKQU-tORg-oiaT-P2kI-aYG74K'  1fffa9ae-ea36-4888-870e-47bd8fc16268
		else
		  search --no-floppy --fs-uuid --set=root 1fffa9ae-ea36-4888-870e-47bd8fc16268
		fi
		echo	'Loading Linux linux ...'
		linux	/vmlinuz-linux root=UUID=c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6 rw  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+ ###

lsblk :

NAME                  MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                     8:0    0   2.7T  0 disk  
|-sda1                  8:1    0   992K  0 part  
`-sda2                  8:2    0   2.7T  0 part  
  `-md0                 9:0    0   2.7T  0 raid1 
    |-server-boot     253:0    0   512M  0 lvm   /boot
    |-server-swap     253:1    0     4G  0 lvm   
    |-server-archroot 253:2    0    20G  0 lvm   /
    `-server-storage  253:3    0   2.7T  0 lvm   
sdb                     8:16   0   2.7T  0 disk  
|-sdb1                  8:17   0   992K  0 part  
`-sdb2                  8:18   0   2.7T  0 part  
  `-md0                 9:0    0   2.7T  0 raid1 
    |-server-boot     253:0    0   512M  0 lvm   /boot
    |-server-swap     253:1    0     4G  0 lvm   
    |-server-archroot 253:2    0    20G  0 lvm   /
    `-server-storage  253:3    0   2.7T  0 lvm

blkid :

/dev/sda2: UUID="ac79aee9-87c6-3ec8-4132-564f7d7b5985" UUID_SUB="3e065aa4-968f-4b12-f366-b272752fb119" LABEL="archiso:0" TYPE="linux_raid_member" PARTLABEL="Linux filesystem" PARTUUID="fb6c186d-26cf-4b8a-a935-1ea6ace68078"
/dev/sdb2: UUID="ac79aee9-87c6-3ec8-4132-564f7d7b5985" UUID_SUB="38f754eb-12b5-335f-0f83-7813964997dd" LABEL="archiso:0" TYPE="linux_raid_member" PARTLABEL="Linux RAID" PARTUUID="5bd89484-a8fe-48cb-aba7-0a42b4c51b86"
/dev/sdc1: LABEL="ARCH_201601" UUID="2E16-376A" TYPE="vfat" PARTUUID="483db5e4-01"
/dev/loop0: TYPE="squashfs"
/dev/md0: UUID="nvNK3V-adxn-gU3Q-HU9Y-AoZP-5qZy-VxghdV" TYPE="LVM2_member"
/dev/mapper/server-boot: UUID="1fffa9ae-ea36-4888-870e-47bd8fc16268" TYPE="ext4"
/dev/mapper/server-swap: UUID="a787eefb-692d-4d2a-9482-11196967ea62" TYPE="swap"
/dev/mapper/server-archroot: UUID="c83b58a5-d4fd-4634-b6b7-1726ca6ffeb6" TYPE="ext4"
/dev/mapper/server-storage: UUID="ae082954-b90a-482a-b002-e53f6f75df5a" TYPE="ext4"
/dev/sda1: PARTUUID="c23e0707-54ed-4299-a797-4fd489976939"
/dev/sdb1: PARTUUID="f7d624a1-8331-4153-b29b-e007552cea2f

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#4 2016-01-12 16:37:36

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 19,772

Re: ERROR: Unable to find root device UUID - LVM RAID

I'd like to help, but I am in over my head with RAID and LVM.  I'll have to defer to others here.

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

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#5 2016-01-12 22:16:08

lsas
Member
Registered: 2010-11-23
Posts: 23

Re: ERROR: Unable to find root device UUID - LVM RAID

Well thanks anyway, ill wait someone else suggestions smile

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#6 2016-01-21 00:09:48

jzvc
Member
Registered: 2016-01-20
Posts: 3

Re: ERROR: Unable to find root device UUID - LVM RAID

I have the same problem. Today I executed 

pacman -Syu

and I cannot boot anymore. "mkinitcpio -p linux" didn't help too. I found in log that "linux" package was upgraded from 4.3.3-2 to 4.3.3-3 during the upgrade. So I chrooted from USB and downgraded the package using pacman -U but still the same.

Is there any progress?

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#7 2016-01-21 09:30:44

jzvc
Member
Registered: 2016-01-20
Posts: 3

Re: ERROR: Unable to find root device UUID - LVM RAID

I found a solution for my issue. The problem was the same as in this thread: https://bbs.archlinux.org/viewtopic.php … 9#p1537029

For some reason I had in /etc/lvm/lvm.conf:

use_lvmetad = 0

I don't remember whether I changed this manually, maybe I wanted to get rid of some error messages during installation. But after changing use_lvmetad to 1 and running "mkinitcpio -p linux" problem solved.

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#8 2016-01-21 10:49:09

x33a
Forum Fellow
Registered: 2009-08-15
Posts: 4,587

Re: ERROR: Unable to find root device UUID - LVM RAID

@jzvc, please mark this thread as solved.

Also, not an installation issue, moving to "Newbie Corner".

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#9 2016-01-22 09:15:22

jzvc
Member
Registered: 2016-01-20
Posts: 3

Re: ERROR: Unable to find root device UUID - LVM RAID

Hi @x33a, I cannot mark this thread as solved because I didn't start it. I had similar issue and I wrote how I solved it, hoping it can help. But still it doesn't have to be the solution that @lsas needs.

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#10 2016-01-22 11:16:44

x33a
Forum Fellow
Registered: 2009-08-15
Posts: 4,587

Re: ERROR: Unable to find root device UUID - LVM RAID

@jzvc, I am sorry for the misunderstanding. Thanks for posting your solution nevertheless.

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