How to mount a 79TB SAN storage to another server?

Hi Team,

How do i mount or connect the SAN storage to a specific folder. I have tried to mount it but each time i can only mount 900GB of the storage to the folder:

ipmi1 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-root_vol
                       58G  1.9G   53G   4% /
tmpfs                 127G     0  127G   0% /dev/shm
/dev/sdc2             477M   51M  401M  12% /boot
/dev/sdc1             1.9G  3.2M  1.8G   1% /boot/efi
/dev/mapper/VolGroup-home_vol
                      106G   60M  101G   1% /home
/dev/mapper/VolGroup-var_vol
                      377G   67M  358G   1% /var/opt

ipmi1 ~]# fdisk -l

Disk /dev/sda: 79900.0 GB, 79899998027776 bytes
255 heads, 63 sectors/track, 9713954 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk identifier: 0x00000000


Disk /dev/sdb: 79900.0 GB, 79899998027776 bytes
255 heads, 63 sectors/track, 9713954 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 1048576 bytes
Disk identifier: 0x00000000


Disk /dev/sdc: 600.1 GB, 600093712384 bytes
255 heads, 63 sectors/track, 72957 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 262144 bytes / 262144 bytes
Disk identifier: 0x00066419

I want to mount /dev/sdb to /var/opt