[root@ol63a ~]# fdisk /dev/sdf
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disk label
Building a new DOS disklabel with disk identifier 0xa5f20199.                     
Changes will remain in memory only, until you decide to write them.               
After that, of course, the previous content won’t be recoverable.                 
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It’s strongly recommended to                                                     
         switch off the mode (command ‘c’) and change display units to                                                       
         sectors (command ‘u’).                                                                                              
Command (m for help): n
Command action         
   e extended        
   p primary partition (1-4)
Partition number (1-4): 1     
First cylinder (1-4177, default 1): 
Using default value 1               
Last cylinder, +cylinders or +size{K,M,G} (1-4177, default 4177): 
Using default value 4177                                          
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.


[root@ol63a ~]# mkfs.ext4 /dev/sdf1

mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
2097152 inodes, 8387930 blocks
419396 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
256 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000, 7962624
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

[root@ol63a ~]# mkdir /oranfs
[root@ol63a ~]# mount -o rw -t ext4 /dev/sdf1 /oranfs
[root@ol63a ~]# df -h
Filesystem Size Used Avail Use% Mounted on
                       50G 3.8G 43G 8% /
tmpfs 1004M 644K 1003M 1% /dev/shm
/dev/sda1 485M 55M 405M 12% /boot
                      9.5G 6.9G 2.1G 77% /home
/dev/sdf1 32G 176M 30G 1% /oranfs