After I accidentally created a GPT label on /dev/sdb, I need to fix the PV NAME "[unknown]" (which was /dev/sdb previously) :
$ sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 ubuntu-vg lvm2 a-- <69.00g 0
/dev/sdb ubuntu-vg lvm2 a-- <20.00g 0
on the second PV from ubuntu-vg VG :
$ sudo pvs -v
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
PV VG Fmt Attr PSize PFree DevSize PV UUID
/dev/sda3 ubuntu-vg lvm2 a-- <69.00g 0 <79.00g 3CHhp6-yMvu-Fnqj-8usZ-EHp8-k88B-Jm8MK3
[unknown] ubuntu-vg lvm2 a-m <20.00g 0 0 CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q
$ sudo vgreduce --removemissing --verbose /dev/ubuntu-vg
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
There are 1 physical volumes missing.
Archiving volume group "ubuntu-vg" metadata (seqno 12).
WARNING: Partial LV ubuntu-lv needs to be repaired or removed.
There are still partial LVs in VG ubuntu-vg.
To remove them unconditionally use: vgreduce --removemissing --force.
WARNING: Proceeding to remove empty missing PVs.
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
There are 1 physical volumes missing.
Creating volume group backup "/etc/lvm/backup/ubuntu-vg" (seqno 13).
$ sudo pvdisplay -m
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
--- Physical volume ---
PV Name /dev/sda3
VG Name ubuntu-vg
PV Size <69.00 GiB / not usable 1.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 17663
Free PE 0
Allocated PE 17663
PV UUID 3CHhp6-yMvu-Fnqj-8usZ-EHp8-k88B-Jm8MK3
--- Physical Segments ---
Physical extent 0 to 17662:
Logical volume /dev/ubuntu-vg/ubuntu-lv
Logical extents 0 to 17662
--- Physical volume ---
PV Name [unknown]
VG Name ubuntu-vg
PV Size 20.00 GiB / not usable 4.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 5119
Free PE 0
Allocated PE 5119
PV UUID CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q
--- Physical Segments ---
Physical extent 0 to 5118:
Logical volume /dev/ubuntu-vg/ubuntu-lv
Logical extents 17663 to 22781
EDIT0 : This /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg contains the LVM metadata prior (from the 2nd of August) to my incident (the 12th of September), can I use it to fix this UUID pb. and if so, how ? :
$ sudo ll /etc/lvm/archive/
total 48
drwx------ 2 root root 4096 Sep 12 16:47 ./
drwxr-xr-x 5 root root 4096 Nov 3 2021 ../
-rw------- 1 root root 1310 Mar 8 2022 ubuntu-vg_00002-434733304.vg
-rw------- 1 root root 1347 Mar 8 2022 ubuntu-vg_00003-1070329593.vg
-rw------- 1 root root 1350 Jun 20 13:04 ubuntu-vg_00004-1689574179.vg
-rw------- 1 root root 1351 Jul 8 09:02 ubuntu-vg_00005-1407536141.vg
-rw------- 1 root root 1332 Aug 2 12:30 ubuntu-vg_00006-1483580564.vg
-rw------- 1 root root 1593 Aug 2 12:33 ubuntu-vg_00007-1330575295.vg
-rw------- 1 root root 1731 Sep 12 14:20 ubuntu-vg_00008-589825908.vg
-rw------- 1 root root 1731 Sep 12 14:20 ubuntu-vg_00009-1110009706.vg
-rw------- 1 root root 1767 Sep 12 15:58 ubuntu-vg_00010-1978053106.vg
-rw------- 1 root root 1777 Sep 12 16:47 ubuntu-vg_00011-663327121.vg
$ sudo cat /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg
id = "Wljig7-1EmZ-HWx6-HD3a-abaR-tAc0-IGTYnj"
seqno = 9
format = "lvm2" # informational
status = ["RESIZEABLE", "READ", "WRITE"]
flags = []
extent_size = 8192 # 4 Megabytes
max_lv = 0
max_pv = 0
metadata_copies = 0
physical_volumes {
pv0 {
id = "3CHhp6-yMvu-Fnqj-8usZ-EHp8-k88B-Jm8MK3"
device = "/dev/sda3" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 144695296 # 68.9961 Gigabytes
pe_start = 2048
pe_count = 17663 # 68.9961 Gigabytes
}
pv1 {
id = "CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q"
device = "/dev/sdb" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 41943040 # 20 Gigabytes
pe_start = 2048
pe_count = 5119 # 19.9961 Gigabytes
}
}
logical_volumes {
ubuntu-lv {
id = "slgzg5-CwNC-0sVo-4qFo-fnVj-A5Eu-4mVLE1"
status = ["READ", "WRITE", "VISIBLE"]
flags = []
creation_time = 1631117746 # 2021-09-08 18:15:46 +0200
creation_host = "ubuntu-server"
segment_count = 1
segment1 {
start_extent = 0
extent_count = 17663 # 68.9961 Gigabytes
type = "striped"
stripe_count = 1 # linear
stripes = [
"pv0", 0
]
}
}
}
}
EDIT1 : I added a new virtual disk to move the data from /dev/sdb but it did not work :
$ lsscsi -ss
[2:0:0:0] cd/dvd NECVMWar VMware SATA CD00 1.00 /dev/sr0 -
[32:0:0:0] disk VMware Virtual disk 2.0 /dev/sda 80.0GiB
[32:0:1:0] disk VMware Virtual disk 2.0 /dev/sdb 20.0GiB
$ ll /dev/sdc
ls: cannot access '/dev/sdc': No such file or directory
$ echo "- - -" | sudo tee /sys/class/scsi_host/host*/scan
- - -
$ lsscsi -ss
[2:0:0:0] cd/dvd NECVMWar VMware SATA CD00 1.00 /dev/sr0 -
[32:0:0:0] disk VMware Virtual disk 2.0 /dev/sda 80.0GiB
[32:0:1:0] disk VMware Virtual disk 2.0 /dev/sdb 20.0GiB
[32:0:2:0] disk VMware Virtual disk 2.0 /dev/sdc 20.0GiB
$ ll /dev/sdc
brw-rw---- 1 root disk 8, 32 Sep 13 10:41 /dev/sdc
$ sudo parted /dev/sdc
GNU Parted 3.3
Using /dev/sdc
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p
Error: /dev/sdc: unrecognised disk label
Model: VMware Virtual disk (scsi)
Disk /dev/sdc: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: unknown
Disk Flags:
(parted) mklabel gpt
(parted)
$ sudo gdisk /dev/sdc
GPT fdisk (gdisk) version 1.0.5
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): p
Disk /dev/sdc: 41943040 sectors, 20.0 GiB
Model: Virtual disk
Sector size (logical/physical): 512/512 bytes
Disk identifier (GUID): F07182AE-3C90-419E-91ED-E1BF652C46A7
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 41943006
Partitions will be aligned on 2048-sector boundaries
Total free space is 41942973 sectors (20.0 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help): n
Partition number (1-128, default 1):
First sector (34-41943006, default = 2048) or {+-}size{KMGTP}:
Last sector (2048-41943006, default = 41943006) or {+-}size{KMGTP}:
Current type is 8300 (Linux filesystem)
Hex code or GUID (L to show codes, Enter = 8300): 8e00
Changed type of partition to 'Linux LVM'
Command (? for help): p
Disk /dev/sdc: 41943040 sectors, 20.0 GiB
Model: Virtual disk
Sector size (logical/physical): 512/512 bytes
Disk identifier (GUID): F07182AE-3C90-419E-91ED-E1BF652C46A7
Partition table holds up to 128 entries
Main partition table begins at sector 2 and ends at sector 33
First usable sector is 34, last usable sector is 41943006
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name
1 2048 41943006 20.0 GiB 8E00 Linux LVM
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y
OK; writing new GUID partition table (GPT) to /dev/sdc.
The operation has completed successfully.
$ sudo pvcreate /dev/sdc1
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
Physical volume "/dev/sdc1" successfully created.
$ sudo vgextend /dev/ubuntu-vg /dev/sdc1
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
Volume group "ubuntu-vg" successfully extended
$ sudo pvs -o+pv_used,uuid
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
PV VG Fmt Attr PSize PFree Used PV UUID
/dev/sda3 ubuntu-vg lvm2 a-- <69.00g 0 <69.00g 3CHhp6-yMvu-Fnqj-8usZ-EHp8-k88B-Jm8MK3
/dev/sdc1 ubuntu-vg lvm2 a-- <20.00g <20.00g 0 CLOgz3-eXyz-nUWm-e1db-oqoR-vldX-hcK4d1
[unknown] ubuntu-vg lvm2 a-m <20.00g 0 <20.00g CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q
$ sudo pvmove /dev/sdb
Failed to find device for physical volume "/dev/sdb".
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
WARNING: VG ubuntu-vg is missing PV CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q (last written to [unknown]).
WARNING: Couldn't find all devices for LV ubuntu-vg/ubuntu-lv while checking used and assumed devices.
Cannot change VG ubuntu-vg while PVs are missing.
See vgreduce --removemissing and vgextend --restoremissing.
Cannot process volume group ubuntu-vg
Run `pvmove --help' for more information.
EDIT2 : Trying a vcfgrestore from /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg :
$ sudo ll /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg
-rw------- 1 root root 1593 Aug 2 12:33 /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg
$ sudo vgcfgrestore --test -f /etc/lvm/archive/ubuntu-vg_00007-1330575295.vg /dev/ubuntu-vg
TEST MODE: Metadata will NOT be updated and volumes will not be (de)activated.
Volume group ubuntu-vg has active volume: ubuntu-lv.
WARNING: Found 1 active volume(s) in volume group "ubuntu-vg".
Restoring VG with active LVs, may cause mismatch with its metadata.
Do you really want to proceed with restore of volume group "ubuntu-vg", while 1 volume(s) are active? [y/n]: y
WARNING: Couldn't find device with uuid CdlY5k-IynC-hYTX-hH3h-HaLC-KAqy-n4h38q.
Cannot restore Volume Group ubuntu-vg with 1 PVs marked as missing.
Restore failed.
How can I fix lvm PV name "[unknown]" without forcing the removal of second PV from VG ?
