====  Backup and restore LVM configuration of a volume group (vg) ====

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To know the **volume groups** of your system, issue the following command, we will use the **VG Name** field:
<code bash>vgdisplay</code>

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This command is automatically done everytime the LVM volume group changes, so you don't really have to schedule this command, but if you want to make sure you have a **fresh backup** of the LVM volume group, you can use:
<code bash>
vgcfgbackup Your-Volume-Group-Name

# or setting the output file
vgcfgbackup -f /etc/lvm/backup/your_own_backup_name Your-Volume-Group-Name
</code>

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Backup will be saved under **/etc/lvm/backup**

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You can restore the LVM configuration (not the files) using:
<code bash>
# -v = verbose
vgcfgrestore Your-Volume-Group-Name -v -f /etc/lvm/backup/Your-Volume-Group-Name

# check it exists, if you see it as 'inactive', use the next 'lvchange' command:
lvscan

lvchange -ay /dev/Your-Volume-Group-Name/lv_whatever
</code>

Source: https://linoxide.com/how-tos/how-to-backup-lvm-configuration-on-linux/