$ sudo cfdisk /dev/sdb
		
		

		
Command (m for help): p

Disk /dev/sda: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          25      200781   83  Linux
/dev/sda2              26        3849    30716280   83  Linux
/dev/sda3            3850       17769   111812400   83  Linux

Command (m for help): d
Partition number (1-4): 3

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (3850-17769, default 3850):
Using default value 3850
Last cylinder or +size or +sizeM or +sizeK (3850-17769, default 17769): +32000M

Command (m for help): p

Disk /dev/sda: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          25      200781   83  Linux
/dev/sda2              26        3849    30716280   83  Linux
/dev/sda3            3850        7740    31254457+  83  Linux