Creates and deletes partitions on a hard drive. The diskpart command is only available when you are using the Recovery Console
diskpart [/add | /delete] [device_name | drive_name | partition_name] [size]
Used without parameters, the diskpart command starts the Windows character-mode version of diskpart.
Creates a new partition.
Deletes an existing partition.
The device on which you want to create or delete a partition. The name can be obtained from the output of the map command. An example of a device name is:
The partition you want to delete, by drive letter. Used only with /delete. An example of a drive name is:
The partition you want to delete, by partition name. Can be used in place of the drive_name. Used only with /delete. An example of a partition name is:
The size, in megabytes (MB), of the partition you want to create. Used only with /add.
The following examples delete a partition:
diskpart /delete \Device\HardDisk0\Partition3
diskpart /delete F:
The following example adds a 20 MB partition to your hard drive:
diskpart /add \Device\HardDisk0 20