Difficulty:Beginner
Applies to:Windows Server 2016

*This is for a new mirrored volume*

 
Hold down the Windows key + X and select Disk Management
Right click an unallocated drive and select New Mirrored Volume ->
Select the available drive from the left. 
Click Add.
Specify how much space you want mirrored. ->
You cannot mirror data to a drive with less allocated space.
Assign a Drive letter that is not in use ->
If using a blank drive, select Format this volume with the following settings with NTFS and allocation unit size set to default.
Name the volume
Tick Perform a quick format ->
Click Finish.
Click Yes to convert disks to dynamic disks (This is required)
Key 
-> = Click next, or continue etc.
 

How to create a mirrored volume with data already in the drive

Hold down the Windows key + X and select Disk Management
Right click the drive you want to be mirrored and select Add Mirror ->
Choose the drive that will act as a duplicate. ->
Click Yes to convert disks to dynamic disks (This is required)
Key 
-> = Click next, or continue etc.