#fdisk /dev/sda

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
The number of cylinders for this disk is set to 30401.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
Command (m for help): p
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x722654ae
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        2432    19535008+  83  Linux
/dev/sda2            2433        3040     4883760   82  Linux swap / Solaris
/dev/sda3            3041        5472    19535040   83  Linux
Command (m for help): d
Partition number (1-4): 3
Command (m for help): p
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x722654ae
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        2432    19535008+  83  Linux
/dev/sda2            2433        3040     4883760   82  Linux swap / Solaris
Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p^[[A
Partition number (1-4): 3
First cylinder (3041-30401, default 3041):
Using default value 3041
Last cylinder or +size or +sizeM or +sizeK (3041-30401, default 30401): +25000M
Command (m for help): p
Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x722654ae
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1        2432    19535008+  83  Linux
/dev/sda2            2433        3040     4883760   82  Linux swap / Solaris
/dev/sda3            3041        6080    24418800   83  Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.