PVE 5.4 LVM error message on startup

[ricardoj]

Hi,

I just installed PVE 5.4 in a single ( /dev/sda ) HD as I'm using BtrFS on the other 2 HD ( /dev/sdb and /dev/sdc ) for my LAB environment.

I selected ext4 from installation Menu.

As so, PVE installation created a LVM volume in this single drive

When I boot there is a message at very beginning :

========================================
Found volume group "pve" using metadata type lvm2
/sbin/modprobe failed: 1
Can't process LV pve/data: thin-pool target support missing from kernel?
2 logical volume(s) in volume group "pve" now active
=========================================

Regards,

Ricardo Jorge

 

[ricardoj]

Hi,

I see on another Forum message that this error message is just "cosmetic"

Well here it was not as I have swap errors

===================================
Apr 28 09:02:37 pve-01 systemd[1]: Found device /dev/pve/swap.
Apr 28 09:02:37 pve-01 systemd[1]: Activating swap /dev/pve/swap...
Apr 28 09:02:37 pve-01 systemd[1]: Activated swap /dev/pve/swap.
Apr 28 09:02:37 pve-01 systemd[1]: Reached target Swap.
Apr 28 09:02:37 pve-01 kernel: [ 0.853994] zswap: loaded using pool lzo/zbud
Apr 28 09:02:37 pve-01 kernel: [ 13.361260] Adding 8388604k swap on /dev/mapper/pve-swap. Priority:-2 extents:1 across:8388604k FS
Apr 28 09:42:14 pve-01 kernel: [ 2394.836068] Read-error on swap-device (253:0:108152)
Apr 28 11:02:21 pve-01 kernel: [ 7201.396118] Read-error on swap-device (253:0:127376)
Apr 28 11:02:21 pve-01 kernel: [ 7201.396129] Read-error on swap-device (253:0:127384)
Apr 28 11:03:22 pve-01 systemd[1]: Found device /dev/pve/swap.
Apr 28 11:03:22 pve-01 systemd[1]: Activating swap /dev/pve/swap...
Apr 28 11:03:22 pve-01 systemd[1]: Activated swap /dev/pve/swap.
Apr 28 11:03:22 pve-01 systemd[1]: Reached target Swap.
Apr 28 11:03:22 pve-01 kernel: [ 0.850377] zswap: loaded using pool lzo/zbud
Apr 28 11:03:22 pve-01 kernel: [ 14.382357] Adding 8388604k swap on /dev/mapper/pve-swap. Priority:-2 extents:1 across:8388604k FS
===================================

Looking at Internet I've found this : https://askubuntu.com/questions/673...-laptop-with-root-partition-on-lvm2-thin-pool

And the solution at the moment was :

====================================
edit a file like : /etc/initramfs-tools/hooks/lvm2thin

put the following content on it

#!/bin/sh
PREREQ=""
prereqs()
{
echo "$PREREQ"
}

case $1 in
prereqs)
prereqs
exit 0
;;
esac

. /usr/share/initramfs-tools/hook-functions
# Begin real processing below this line
copy_exec /lib/modules/${version}/kernel/drivers/md/dm-thin-pool.ko
copy_exec /lib/modules/${version}/kernel/drivers/md/dm-bio-prison.ko
copy_exec /lib/modules/${version}/kernel/drivers/md/dm-bufio.ko
copy_exec /lib/modules/${version}/kernel/drivers/md/persistent-data/dm-persistent-data.ko
#
copy_exec /usr/sbin/thin_check

save the file

run chmod 755 /etc/initramfs-tools/hooks/lvm2thin

run update-initramfs -u

reboot
====================================

I hope this help someone else.

I'm still evaluating this solution.

So far it is working.

Regards,

Ricardo Jorge