Creates a mirror volume using two specified dynamic disks. Syntax: CREATE VOLUME MIRROR SIZE= DISK= , ALIGN= NOERR SIZE= ...

    Creates a mirror volume using two specified dynamic disks.

Syntax:  CREATE VOLUME MIRROR [SIZE=] DISK=, [ALIGN=] [NOERR]

    SIZE=    The amount of disk space, in megabytes (MB), that the volume
                will occupy on each disk. If no size is given, the new volume
                takes up the remaining free space on the smaller disk and an
                equal amount of space on other disk.

    DISK=,

                The dynamic disks on which the mirror volume is created. You
                need two dynamic disks to create a mirror volume. An amount
                of space equal to the size specified in SIZE= is allocated
                on each disk.

    ALIGN=   Typically used with hardware RAID Logical Unit Number (LUN)
                arrays to improve performance. Aligns all volume extents to 
                the closest alignment boundary. The extent offsets will be
                a multiple of N.

    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 you create the volume, the focus automatically shifts to the new
    volume.

Example:

    CREATE VOLUME MIRROR SIZE=1000 DISK=1,2