When would you need a hard drive cloning?

• When you want to copy all the content from one disk to another quickly and easily
• When you want to create a bootable CD/DVD or USB disk
• When you want to upgrade your hard drive to a better one in capacity and in productivity
• When your hard drive contains not only simple data but also an operating system

So, the hard drive cloning task means that the newly clone disk must works exactly the same as the replaced one.