A partition is a logical division of a hard disk to store various kinds of things, such as operating systems, applications, programs, files, movies, videos, etc. A partition is created when you format the hard disk. Typically, every partition has a drive letter, such as C, D, E… Here Partition and volume are interchangeable terms.

When booting an operating system into computer, the most important part of the process is to control the first sector of the disk, because it includes a partition table that defines how many volumes the hard disk is formatted into, the size of each, and the address where each volume begins.

Within years of use, the capacity of partition will be decreasing with installed data increasing. When the partition has been divided, there must be some tools available to manage it. Windows provides users two internal tools to use, Disk Management and Diskpart.

The Disk Management tool is a graphical user interface way of managing hard drive, which is a very effective tool for seeing the logical layout of disks. This tool allows you to perform disk management tasks, such as create and delete volumes and logical drives, as well as gather status information concerning partition sizes, available free space, volume labels, drive-letter assignment, file system type, and the health of your disks.

DiskPart is a text-mode command interpreter that enables you to manage objects (disks, partitions, volumes, or virtual hard disks) in all versions of Windows and Windows Server beginning with Windows XP and Windows Server 2003. The utility adds capability to the Windows Disk Management snap-in.