Add a new hard drive to CentOS 7

Refer to 1. https://www.server-world.info/en/note?os=CentOS_7&p=add_hd
              2. https://www.tecmint.com/add-new-disk-to-an-existing-linux/

Step 1. Open a terminal and change to root
Step 2. Goto /dev to see which one is going to be added
    # cd /dev
    # ls -l sd*
Step 3: Fdisk it and change partition id to 0x8E (Linux LVM)
    # fdisk /dev/sdb
Step 4. show new drive partition status
    # sfdisk -l /dev/sdb
Step 5. format a new hard drive with ext4
    # mkfs.ext4 /dev/sdb1




Step 6. mount a new hard drive
    # mkdir /data; mount /dev/sdb1 /data
Step 7. Modified /etc/fstab, added
    /dev/sdb1    /data    ext4    defaults    0  0