Creates a logical partition in an existing extended partition.

For examples of how this command can be used, see Examples.


create partition logical [size=<n>] [offset=<n>] [align=<n>] [noerr]


Parameter Description


The size of the partition in megabytes (MB). If no size is given, the partition continues until there is no more free space in the extended partition.


Applies to master boot record (MBR) disks only. The offset in kilobytes (KB), at which the partition is created. If no offset is given, then the partition is placed in the first disk extent that is large enough to hold it. The partition is at least as long in bytes as the number specified by size=<n>. If you specify a size for the logical partition, it must be smaller than the extended partition.


Typically used with hardware RAID Logical Unit Number (LUN) arrays to improve performance. Aligns all volume or partition extents to the closest alignment boundary. n is the number of kilobytes (KB) from the beginning of the disk to the closest alignment boundary


For scripting only. When an error is encountered, DiskPart continues to process commands as if the error did not occur. Without this parameter, an error causes DiskPart to exit with an error code.


  • If the size and offset parameters are not specified, the logical partition is created in the largest disk extent available in the extended partition.

  • After the partition has been created, the focus automatically shifts to the new logical partition.

  • A basic MBR disk must be selected for this operation to succeed. Use the select disk command to select a disk and shift the focus to it.


To create a logical partition of 1000 megabytes in size, in the extended partition of the selected disk, type:

create partition logical size=1000

Additional references