diskmgmt.msc
and hit Enter. You will then see a window showing all the drives
attached to the system. In this case, the new 10 TB drives are shown as
"unallocated", since they have not been partitioned and formatted yet.
I mirrored Disk 1 to Disk 2 by clicking on Disk 1 to select it and then clicked on Action from the menu bar, then selected All Tasks, and then New Mirrored Volume....
That opened a "Welcome to the New Mirrored Volume Wizard" window.
I then saw a "Select Disks" window where I could select the second disk to mirror it from the first disk.
I clicked on Disk 2 to add it as a mirrored disk and then clicked on Add> which added it to the Selected list. The total volume size in megabytes (MB) then showed the capacity of an individual disk, since both were 10 TB disks.
When I clicked on Next, I had the opportunity to change the drive letter assigned to the mirrored volume. Since there was no drive "D" in the system, that was the default value, which I accepted.
When you click on Next, you can choose the filesystem for the drive when you format it. By default, the drive will be formatted with the NTFS file system. You also have the option to perform a quick format, which was all I needed, and to enable file and folder compression, which I chose not to do.
The next window is the "Completing the New Mirrored Volume Wizard" stage that shows you the options you have chosen.
At the next window, I was notified that "The operation you selected will convert the selected basic disk(s) to dynamic disks(s). If you convert the disk(s) to dynamic, you will not be able to start installed operating systems from any volume on the disk(s) (except the current boot volume). Are you sure you want to continue?" I chose "Yes," since I had no plans to install another operating system from which I might boot the system on the new drives.
Within a minute, the new mirrored volume was set up.
You can then close the Disk Management window. Or, if you wish to change the name of the mirrored volume from the default of "New Volume," right-click on the volume and choose Properties. You can then type a new name for the volume in the volume name field and click on Ok.
