The number of cylinders for this disk is set to 60801.
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: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x2bd2c32a
   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1         608     4883728+  82  Linux swap / Solaris
/dev/sda2   *         609        3040    19535040   83  Linux
/dev/sda3            3041        5472    19535040   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 (3041-60801, default 3041):
Using default value 3041
Last cylinder or +size or +sizeM or +sizeK (3041-60801, default 60801): +25000M
Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 83
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.