Microsoft Knowledge Base Article 307880 contains the following summary:
This step-by-step article describes how to create a mirrored volume on a remote Windows 2000 Server-based
computer by using the Disk Management snap-in in Microsoft Windows XP. You can use the Disk Management snap-in
to create a mirrored volume from unallocated disk space on a dynamic disk, or mirror an existing simple volume on a dynamic disk.
A mirrored volume, also known as a RAID-1 volume, is a fault-tolerant volume that duplicates data on two different physical disks. Mirrored volumes are supported on dynamic disks, and provide data redundancy by using two identical copies (mirrors) of the volume.
You cannot create mirrored volumes on computers that are running Windows XP Home Edition, Windows XP Professional or Windows XP 64-Bit Edition. However, you can use a computer that is running Windows XP Professional to create mirrored volumes on remote computers that are running Windows 2000 Server, Windows 2000 Advanced Server, or Windows 2000 Datacenter Server. You must have administrative privileges on the remote computer to do this.