I have my current partition disk space (found at /dev/mapper/cl-root) set at 50Go on my CentOS server. I want to extend the current disk space (to become 500Go ...
First add the newly added 50GB to your LVM, using pvresize /dev/sda3 (Adding the free space to the LVM), then use lvextend -l +100%FREE /dev/mapper/vg_centos