I have a machine with a RAID-1 (sda) hosting Debian 10 and a RAID-5 being used for storage (sdb), both using independent PGs. Recently the RAID-5 was corrupted, so I recreated it and set up the LVM again:
pvcreate /dev/sdb1
vgcreate "server-h01-space" /dev/sdb1
lvcreate -n "storage" -L 20.5T server-h01-space
During setup pvcreate and vgcreate reported an existing XFS signature and offered to wipe it. I declined in the hope that the filesystem could be recovered. However, lvcreate failed as it could not find a volume group. I rebooted the machine and ran the commands again, this time wiping the XFS signature. After that I set up the filesystem on /dev/mapper/server--h01--space-storage and mounted it.
However, while everything seems to have worked fine, all LVM commands only show what has been created on sda. I.e. the *display commands report
# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name server-h01
PV Size 134.75 GiB / not usable 0
Allocatable yes
PE Size 4.00 MiB
Total PE 34497
Free PE 7873
Allocated PE 26624
PV UUID aaaaa-bbbb-cccc-dddd-eeee-ffff-ggggg
# vgdisplay
--- Volume group ---
VG Name server-h01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 23
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 134.75 GiB
PE Size 4.00 MiB
Total PE 34497
Alloc PE / Size 26624 / 104.00 GiB
Free PE / Size 7873 / 30.75 GiB
VG UUID 11111-2222-3333-4444-5555-6666-7777-88888
# lvdisplay
--- Logical volume ---
LV Path /dev/server-h01/root
LV Name root
VG Name server-h01
LV UUID ***
LV Write Access read/write
LV Creation host, time Microknoppix, 2019-10-09 10:48:26 +0200
LV Status available
# open 1
LV Size 25.00 GiB
Current LE 6400
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:0
--- Logical volume ---
LV Path /dev/server-h01/tmp
LV Name tmp
VG Name server-h01
LV UUID ***
LV Write Access read/write
LV Creation host, time Microknoppix, 2019-10-09 10:48:37 +0200
LV Status available
# open 1
LV Size 7.00 GiB
Current LE 1792
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:2
--- Logical volume ---
LV Path /dev/server-h01/var
LV Name var
VG Name server-h01
LV UUID ***
LV Write Access read/write
LV Creation host, time Microknoppix, 2019-10-09 10:48:53 +0200
LV Status available
# open 1
LV Size 63.00 GiB
Current LE 1280
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:3
--- Logical volume ---
LV Path /dev/server-h01/log
LV Name log
VG Name server-h01
LV UUID ***
LV Write Access read/write
LV Creation host, time server-h01, 2019-10-13 21:40:41 +0200
LV Status available
# open 1
LV Size 9.00 GiB
Current LE 2304
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:6
This is contradicted by the output of mount
# mount|grep -e "^\/dev"
/dev/mapper/server--h01-root on / type xfs (rw,relatime,attr2,inode64,noquota)
/dev/sda1 on /boot type xfs (rw,relatime,attr2,inode64,noquota)
/dev/mapper/server--h01-tmp on /tmp type xfs (rw,relatime,attr2,inode64,usrquota,grpquota)
/dev/mapper/server--h01-var on /var type xfs (rw,relatime,attr2,inode64,usrquota,grpquota)
/dev/mapper/server--h01-log on /var/log type xfs (rw,noexec,relatime,attr2,inode64,noquota)
/dev/mapper/server--h01--space-storage on /storage type xfs (rw,noexec,relatime,attr2,inode64,usrquota,grpquota)
I am afraid that the LVM is not persistent and will be lost with the next reboot. Unfortunately I discovered the issue only after /storage was populated with several TB of data.
Any ideas why mount does not agree with pvdisplay?
Edit: Output of *scan commands as requested:
# pvscan
PV /dev/sda2 VG server-h01 lvm2 [134.75 GiB / 30.75 GiB free]
Total: 1 [134.75 GiB] / in use: 1 [134.75 GiB] / in no VG: 0 [0 ]
# vgscan
Reading all physical volumes. This may take a while...
Found volume group "server-h01" using metadata type lvm2
# lvscan
ACTIVE '/dev/server-h01/root' [25.00 GiB] inherit
ACTIVE '/dev/server-h01/tmp' [7.00 GiB] inherit
ACTIVE '/dev/server-h01/var' [63.00 GiB] inherit
ACTIVE '/dev/server-h01/log' [9.00 GiB] inherit
Edit: These are the relevant logs from /etc/lvm/archive
# Generated by LVM2 version 2.03.02(2) (2018-12-18): Sun May 14 15:56:19 2023
contents = "Text Format Volume Group"
version = 1
description = "Created *before* executing 'vgcreate server-h01-space /dev/sdb1'"
creation_host = "server-h01" # Linux server-h01 4.19.0-24-amd64 #1 SMP Debian 4.19.282-1 (2023-04-29) x86_6
4
creation_time = 1684072579 # Sun May 14 15:56:19 2023
server-h01-space {
id = "***"
seqno = 0
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 = "***"
device = "/dev/sdb1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 58599665664 # 27.2876 Terabytes
pe_start = 2048
pe_count = 7153279 # 27.2876 Terabytes
}
}
}
# Generated by LVM2 version 2.03.02(2) (2018-12-18): Sun May 14 15:56:43 2023
contents = "Text Format Volume Group"
version = 1
description = "Created *before* executing 'lvcreate -n server -L 20.5T server-h01-space'"
creation_host = "server-h01" # Linux server-h01 4.19.0-24-amd64 #1 SMP Debian 4.19.282-1 (2023-04-29) x86_6
4
creation_time = 1684072603 # Sun May 14 15:56:43 2023
server-h01-space {
id = "***"
seqno = 1
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 = "***"
device = "/dev/sdb1" # Hint only
status = ["ALLOCATABLE"]
flags = []
dev_size = 58599665664 # 27.2876 Terabytes
pe_start = 2048
pe_count = 7153279 # 27.2876 Terabytes
}
}
}
