Notes about LVM for myself
Please kindly ignore me, I think this is useless for 99.99999% of the population out there.
Commands
pvdisplay
vgdisplay
lvdisplay
lvrename
manually mounting a logical volume
mkdir /data
chown -R nobody:nogroup /data/
chmod 777 /data/
echo '/dev/pve-4tb/userdata /data ext4 defaults 0 2' >> /etc/fstab
mountpoint for a container
pct set 101 -mp0 /data,mp=/data,backup=0