missing volume group + mdadm device during booting (Debian 10 software raid + lvm)
by jogyulas from LinuxQuestions.org on (#4WY30)
Hi Guys,
Today I reinstalled my home server with software raid + lvm.
It is a little bit confusing when my system is booting it shows the attached screenshot (volume group not found + in mdadm conf there is no listed device). But after these warning my system starts, works well and it looks everything is fine.
Can I solve these warning somehow or should I just ignore them? Actually it would be nice to understand what it means, unforunetaly I am not familiar enough in it.
here it is some outpouts if they need:
Code:root@en-core:~# mdadm --detail --scan --verbose
ARRAY /dev/md/0 level=raid1 num-devices=2 metadata=1.2 name=en-core:0 UUID=37497a39:ed3fd731:0fcf29fb:702f3c4a
devices=/dev/sda1,/dev/sdb1Code:root@en-core:~# file -s /dev/md/0
/dev/md/0: symbolic link to ../md0
root@en-core:~# file -s /dev/md0
/dev/md0: LVM2 PV (Linux Logical Volume Manager), UUID: CVMdti-P1cW-4sEx-nBEZ-vCl2-3E04-LsvniP, size: 15364784128
root@en-core:~# file -s /dev/dm-0
/dev/dm-0: Linux rev 1.0 ext4 filesystem data, UUID=647cd03f-c826-43a3-88b5-53abc0b6163a (needs journal recovery) (extents) (64bit) (large files) (huge files)Code:root@en-core:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdb1[1] sda1[0]
15004672 blocks super 1.2 [2/2] [UU]
unused devices: <none>Code:root@en-core:~# cat /etc/mdadm/mdadm.conf
# mdadm.conf
#
# !NB! Run update-initramfs -u after updating this file.
# !NB! This will ensure that initramfs has an uptodate copy.
#
# Please refer to mdadm.conf(5) for information about this file.
#
# by default (built-in), scan all partitions (/proc/partitions) and all
# containers for MD superblocks. alternatively, specify devices to scan, using
# wildcards if desired.
#DEVICE partitions containers
# automatically tag new arrays as belonging to the local system
HOMEHOST <system>
# instruct the monitoring daemon where to send mail alerts
MAILADDR root
# definitions of existing MD arrays
ARRAY /dev/md/0 metadata=1.2 UUID=37497a39:ed3fd731:0fcf29fb:702f3c4a name=en-core:0
# This configuration was auto-generated on Sun, 22 Dec 2019 13:12:13 +0100 by mkconfThanks in advance,
Attached Thumbnails
Today I reinstalled my home server with software raid + lvm.
It is a little bit confusing when my system is booting it shows the attached screenshot (volume group not found + in mdadm conf there is no listed device). But after these warning my system starts, works well and it looks everything is fine.
Can I solve these warning somehow or should I just ignore them? Actually it would be nice to understand what it means, unforunetaly I am not familiar enough in it.
here it is some outpouts if they need:
Code:root@en-core:~# mdadm --detail --scan --verbose
ARRAY /dev/md/0 level=raid1 num-devices=2 metadata=1.2 name=en-core:0 UUID=37497a39:ed3fd731:0fcf29fb:702f3c4a
devices=/dev/sda1,/dev/sdb1Code:root@en-core:~# file -s /dev/md/0
/dev/md/0: symbolic link to ../md0
root@en-core:~# file -s /dev/md0
/dev/md0: LVM2 PV (Linux Logical Volume Manager), UUID: CVMdti-P1cW-4sEx-nBEZ-vCl2-3E04-LsvniP, size: 15364784128
root@en-core:~# file -s /dev/dm-0
/dev/dm-0: Linux rev 1.0 ext4 filesystem data, UUID=647cd03f-c826-43a3-88b5-53abc0b6163a (needs journal recovery) (extents) (64bit) (large files) (huge files)Code:root@en-core:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md0 : active raid1 sdb1[1] sda1[0]
15004672 blocks super 1.2 [2/2] [UU]
unused devices: <none>Code:root@en-core:~# cat /etc/mdadm/mdadm.conf
# mdadm.conf
#
# !NB! Run update-initramfs -u after updating this file.
# !NB! This will ensure that initramfs has an uptodate copy.
#
# Please refer to mdadm.conf(5) for information about this file.
#
# by default (built-in), scan all partitions (/proc/partitions) and all
# containers for MD superblocks. alternatively, specify devices to scan, using
# wildcards if desired.
#DEVICE partitions containers
# automatically tag new arrays as belonging to the local system
HOMEHOST <system>
# instruct the monitoring daemon where to send mail alerts
MAILADDR root
# definitions of existing MD arrays
ARRAY /dev/md/0 metadata=1.2 UUID=37497a39:ed3fd731:0fcf29fb:702f3c4a name=en-core:0
# This configuration was auto-generated on Sun, 22 Dec 2019 13:12:13 +0100 by mkconfThanks in advance,
Attached Thumbnails