$ 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