gistfile1.txt

systemctl stop glusterd
rm -rf /var/lib/glusterd/*

remove fstab records adn reboot server to remove busy mounts (easier than to find them)
#get list of vgs
vgs 
vgremove vg_something
#wide disk
pvremove /dev/sdb --force --force -y

systemctl start glusterd
 systemctl stop heketi
 rm -rf /var/lib/heketi/heketi.db
 systemctl start heketi
 
 
 
 #### IN ACTION:
 rm -rf /var/lib/glusterd/*
 #clean fstab
 vi /etc/fstab
 reboot
 
 vgs
 vgremove vg_af6da8defe6e2696dfb650a1262de3e8
 pvremove /dev/sdb
 systemctl status glusterd