Changes

A mirror may be added to an existing volume using either the Disk Managament snap-in, or from the command-prompt using the '''diskpart''' tool. When a mirror is added to an existing volume Windows creates a second volume equal is in size and file system type on a second disk of your choice and copies (a process also known as ''resynching'') the data on the existing volume to the mirror.

To a mirror to an existing volume using Disk management, right click on the existing volume in the graphical view and select ''Add Mirror'' to invoke the ''Add Mirror'' dialog shown below: