How to repair my LVM volume which fails with "device not found"?

Question

On the next boot after an fairly standard upgrade on my arch linux box, the system failed to boot and stopped in maintenance mode ; I found out that if I commented out in /etc/fstab the lvm partition that I have on a secondary disk (my root and home are not in LVM) it accepted to boot.

Now it runs OK but I can't access the data on this partition, and the necessary device doesn't get created. The various scan commands of LVM tell me that : "WARNING: Device for PV WbbZgi-PEpk-mWNz-faCX-IT1n-Vrsd-wFoGOP not found or rejected by a filter." I haven't changed any configuration and I don't have any filter in /etc/lvm/lvm.conf. Here are some infos I think are relevant :

[root@bureau64 ~]# cat /etc/fstab
# /dev/sdb3
UUID=a2b6fa8e-1255-4563-b126-153c5a9178b5   /           btrfs       rw,noatime,ssd,space_cache,subvolid=5,subvol=/  0 0
# /dev/sdb4
UUID=a8c42099-3ec2-4bb9-b0ea-a126167523ef   /home       btrfs       rw,noatime,ssd,space_cache,subvolid=5,subvol=/  0 0
# /dev/sdb1
UUID=bc6e027d-ae37-419e-b394-02d4674e693f   /boot       ext2        rw,relatime,block_validity,barrier,user_xattr,acl   0 2
# /dev/sdb2
UUID=839a15de-bd4d-47a1-9727-6a9d394d741a   none        swap        defaults    0 0
## THE ONE I HAD TO COMMENT :
#/dev/VGroupe0/data             /data       ext4        rw,data=ordered 0 2

[root@bureau64 ~]# ls /dev/VGroupe0
ls: impossible d'accéder à '/dev/VGroupe0': Aucun fichier ou dossier de ce type

[root@bureau64 ~]# pvscan 
  WARNING: Device for PV WbbZgi-PEpk-mWNz-faCX-IT1n-Vrsd-wFoGOP not found or rejected by a filter.
  PV /dev/sda4   VG VGroupe0        lvm2 [217,46 GiB / 168,00 MiB free]
  PV [unknown]   VG VGroupe0        lvm2 [107,57 GiB / 77,57 GiB free]
  Total: 2 [<325,04 GiB] / in use: 2 [<325,04 GiB] / in no VG: 0 [0   ]

[root@bureau64 ~]# lvscan 
  WARNING: Device for PV WbbZgi-PEpk-mWNz-faCX-IT1n-Vrsd-wFoGOP not found or rejected by a filter.
  inactive          '/dev/VGroupe0/root' [25,00 GiB] inherit
  inactive          '/dev/VGroupe0/home' [5,00 GiB] inherit
  inactive          '/dev/VGroupe0/data' [<217,30 GiB] inherit

[root@bureau64 ~]# blkid 
/dev/sda1: UUID="0C60E75260E740D6" TYPE="ntfs" PARTUUID="c169c169-01"
/dev/sda2: UUID="395e11a4-6841-455c-b2f6-ff84d8d73f49" TYPE="ext2" PARTUUID="c169c169-02"
/dev/sda3: LABEL="swap" UUID="bf964fa7-8690-4111-89d1-7cbbc0a1df43" TYPE="swap" PARTUUID="c169c169-03"
/dev/sda4: UUID="CF3ZqC-JNaF-BMlE-uCT8-Mv0E-dfPm-a2vmea" TYPE="LVM2_member" PARTUUID="c169c169-04"
/dev/sdb1: UUID="bc6e027d-ae37-419e-b394-02d4674e693f" TYPE="ext2" PARTUUID="a294f4fa-01"
/dev/sdb2: UUID="839a15de-bd4d-47a1-9727-6a9d394d741a" TYPE="swap" PARTUUID="a294f4fa-02"
/dev/sdb3: UUID="a2b6fa8e-1255-4563-b126-153c5a9178b5" UUID_SUB="22f83bf4-0c48-44ad-b016-7edf820c365e" TYPE="btrfs" PARTUUID="a294f4fa-03"
/dev/sdb4: UUID="a8c42099-3ec2-4bb9-b0ea-a126167523ef" UUID_SUB="ae03aa3d-8823-47ea-83b2-53f584e03e59" TYPE="btrfs" PARTUUID="a294f4fa-04"

I don't exactly remember the configuration of my LVM partitions, the volumes 'root' and 'home' were from a previous install and I don't care about them, but I care quite a lot about 'data'. How can I fix this issue and mount my partition again ?

Solution

vgreduce --removemissing --force centos

(in my case the centos was the VG name replace with your respective VG name)

Comments

[Ignacio Vazquez-Abrams]

Does your system only have two hard drives?

[Guillaume Deshors]

Yes : one HD and one SSD that I installed later, hence the old root and home in the LVM volume.

[Anders Kreinøe]

Run this with care, as vgreduce with --force can be potential dangerous and cause data loss in some situations.

[Brain2000]

This doesn't help if the vg doesn't exist, and just pv does.