At first you need to unmount the second device again, before you proceed with the following steps: You will have to add the device /dev/vdb into your logical volume group VolGroup, you can do this using vgextend. vgextend VolGroup /dev/vdb After this you can first grow the logical volume lv_root to the size of the…

[root@localhost ~]# systemctl stop firewalld [root@localhost ~]# systemctl disable firewalld rolekit