Setting Up Two New Drives as Mirrored
If you have two new equal-sized drives, you can format them to be mirrored copies of each other from the get-go.
Open the Disk Management window as described above. Make sure that the drives are unallocated. If they’re not, and you don’t need the data on either of them, right-click and select Delete volume
Right-click on one of the unallocated drives and select New Mirrored Volume
A wizard will pop up. Click Next.
Click on the drives you want to hold the mirrored data and click Add. Note that you can add any number of drives. Click Next.
Assign it a drive letter that makes sense, and then click Next.
You’re limited to using the NTFS file system for mirrored drives, so enter a volume label, enable compression if you want, and then click Next.
Click Finish to start formatting the drives.
You will be warned that the new drives will be converted to dynamic disks.
And that’s it! You now have two mirrored drives. Any files added to E: will reside on both physical disks, in case something happens to one of them.