Macrium Reflect is a program intended for disk backups and restorations.
If you were wanting to make an exact image (copy) of a hard drive, you can backup that disk through Macrium Reflect. Then you can restore that image to whatever destination you want.
One practical use for this software is for when your hard drive is showing signs of failure. Rather than waiting for that disk to crash which potentially means losing all your data, you can make an image of that disk and then restore it onto a new, fresh hard drive.
The program is easy to use and works well.
Check it out!
Macrium Software Image Source: http://www.macrium.com/