Problem: Free inodes is less than 20% on volume /
1. Login by ssh the host
2. Edit the file /etc/lvm/lvm.conf Change to 0 (cero) the value of backup variable.
..
# stored in a human readable text format.
backup {
# Configuration option backup/backup.
# Maintain a backup of the current metadata configuration.
# Think very hard before turning this off!
backup = 0
# Configuration option backup/backup_dir.
# Location of the metadata backup files.
# Remember to back up this directory regularly!
backup_dir = "/etc/lvm/backup"
3. Delete the backup file of the directory /etc/lvm/backup with rm command.
rm -rf /etc/lvm/backup/*