Creates an extended partition on the disk with focus. Syntax: CREATE PARTITION EXTENDED SIZE= OFFSET= ALIGN= NOERR SIZE= ...

Creates an extended partition on the disk with focus.  Syntax:  CREATE PARTITION EXTENDED [SIZE=] [OFFSET=] [ALIGN=] [NOERR]      SIZE=    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.      OFFSET=  Applies to master boot record (MBR) disks only. The offset, in                 kilobytes (KB), at which the partition is created. If no offset                 is given, the partition will start at the beginning of the                 first free space on the disk.      ALIGN=   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.      NOERR       For scripting only. When an error is encountered, DiskPart                 continues to process commands as if the error did not occur.                 Without the NOERR parameter, an error causes DiskPart to exit                 with an error code.      After the partition has been created, the focus automatically shifts to the     new partition. Only one extended partition can be created per disk. This     command fails if you attempt to create an extended partition within another     extended partition. You must create an extended partition before you can     create logical partitions.      A basic MBR disk must be selected for this operation to succeed.  Example:      CREATE PARTITION EXTENDED SIZE=1000