# lsblk
# fdisk -l
# pvscan
# fdisk /dev/sdb
# lsblk
# pvcreate
# pvcreate /dev/sdb1
# vgdisplay
# vgextend rhel /dev/sdb1
# pvscan
# lvdisplay
# lvextend /dev/rhel/root /dev/sdb1
# resize2fs /dev/rhel/root
# resizexfs /dev/rhel/root
# resize2xfs /dev/rhel/root
# resize2fs /dev/rhel/root
# df -hT
# resize2fs /dev/rhel/root
# fdisk /dev/sdb
# partprobe
# resize2fs /dev/rhel/root
# vim /etc/fstab
# lvdisplay
# blkid
# lsblk
# lvs
# df
# df -h
# xfs_growfs /dev/rhel/root
# df -hT