The diskpart command is a Recovery Console command used to create or delete partitions on hard drives.
diskpart /add
/add = The /add option will create a new partition on the specified hard drive.
diskpart /delete
/delete = This option will remove a specified partition on a specified hard drive.
diskpart /add \Device\HardDisk0 5000
In the above example, the diskpart command creates a 5,000 MB partition on the hard drive located at \Device\HardDisk0.
diskpart /delete \Device\HardDisk0\Partition1
In the above example, the diskpart command will remove the Partition1 partition located on the hard drive \Device\HardDisk0.
diskpart /delete G:
In the above example, the diskpart command will remove the partition currently assigned the drive letter G.
The diskpart command is only available from within the Recovery Console in Windows 2000 and Windows XP.

