#!/usr/bin/bash

mkdir /mnt/lvbackup
mount /dev/mapper/vg_lancaster-lv08 /mnt/lvbackup/
pushd /mnt/lvbackup

tar -Jcf backconf-$(date +%Y%m%d).tar.xz $(locate '*\.bak')
find . -name "backconf-*.tar.xz" -ctime +30 -delete

popd
umount /mnt/lvbackup 
rmdir /mnt/lvbackup/