My client has a single Server 2008R2 machine. Boot drive is operating system only... a mirrored drive set that is getting full. There is also a RAID 5 array with all of their data. This drive is fine and has plenty of space left. There are open slots in the controller so I installed a pair of larger drives and mirrored them to replace the old boot drive (C:\). What is the best way to copy/image/mirror/whatever the original operating system to the new drive(s) making them bootable and with the least effort? I can take the server down on the weekends if necessary. There is no VM involved at all. New drives are installed and mirrored but I have not yet configured them as a volume. Is there a particular piece of software that will handle this?