Need HDD Solution

I installed cPanel on of my Dedicated server has

500GB HDD -

But when I was checking it shows -

---------------------------------------
root@local [~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
215G 6.2G 197G 4% /
/dev/sda2 99M 19M 76M 20% /boot
tmpfs 1009M 0 1009M 0% /dev/shm
/usr/tmpDSK 485M 13M 447M 3% /tmp
root@local [~]#
------------------------------------------

But Available size 215G just hit me Can you till me what is the issue?? I don't get that

Help me

 

Thank You..

It's SOLVED

 

How to mount the 2nd HDD

Code:

root@my1 [~]# fdisk -l

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1275    10241406    7  HPFS/NTFS
/dev/sda2            1276        1288      104422+  83  Linux
/dev/sda3            1289       30401   233850172+  8e  Linux LVM

Disk /dev/sdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *           1       30400   244187968+   7  HPFS/NTFS

How to mount the 2nd HDD?