Need Empty Hard Drive on LINUX Centos 7 Server Mounted for Use.

Need unused Drive Mounted.

df -h

Filesystem Size Used Avail Use% Mounted on
/dev/sda3 450G 5.9G 444G 2% /
devtmpfs 7.9G 0 7.9G 0% /dev
tmpfs 7.9G 0 7.9G 0% /dev/shm
tmpfs 7.9G 17M 7.9G 1% /run
tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
/dev/sda1 497M 154M 344M 31% /boot
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fdisk -l

Disk /dev/sda: 500.1 GB, 500107862016 bytes, 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000ce3f0

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 33794047 16384000 82 Linux swap / Solaris
/dev/sda3 33794048 976773119 471489536 83 Linux

Disk /dev/sdb: 500.1 GB, 500107862016 bytes, 976773168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000c6b60

Device Boot Start End Blocks Id System
/dev/sdb1 2048 976773119 488385536 8e Linux LVM