Read the full article and know how to restore a Windows 2012 backup of the operating system taken to a second hard drive.

If you have a SATA backup drive and have been taking Windows backups to it, then need to restore your system drive, you need to follow the instructions located at this article:

http://www.techrepublic.com/blog/data-center/how-to-restore-a-system-image-in-windows-server-2012/

Through the self service portal (https://portal.controlmyvps.com.au) you can mount the Windows 2012 DVD and then access the console to perform the restore.