Windows NT 4.0 Fault Talerant Boot Disk

Scenerio:
Windows NT 4.0 SP6 installed and functioning on a 4 GIG partition of a 30 GIG IDE Disk ID 0
This partition is Mirrored to an 18 GIG SCSI drive Disk ID 1. Both the drives are functioning and the mirror is intact.

Where do I go to create a Fault Talerant Boot Disk. I have read articles on MS TechNet on how to create one after a drive failure. But was unable to find a proceedure for creating one while everything is functioning. I am assuming there is a tool or a wizard built into NT 4.0 which will allow me to create a Fault Talerant boot disk.
If some one could supply me with instructions on how to accomplish this I would appreciate it greatly.