Clone HD with Disk Utility
Clone of hard drive saves your precious data under physical/logical disk failure..
Your hard drive may be new or probably from the best manufacturer, but you can never guaranty “It won't fail”. Apart from being old, there are lots many other reasons including mechanical, electrical and firmware failure, which can make your Mac hard drive crash. If the drive with many of your extremely important business documents and personal files fail, the loss is simply beyond explanation. However, you can easily overcome such situations of data loss by keeping a clone copy of your Mac hard drive.
Disk Utility can clone your Mac hard drive..
Apple is indeed right in its saying that the Mac OS X has been built with all the amenities that a user requires for his/her daily computer use. For keeping a safe copy of your precious data in the Mac hard drive, Apple has included an option in Disk Utility – 'Restore'. This option in Disk Utility allows you to copy the entire data of your hard disk to another hard drive or any external media. With this 'Restore' option, you can also restore data from any previously created disk image stored on your local drive or any network-attached media.
The process of backing up data using Disk Utility is simple and can be performed in few easy steps as below:
How to Clone Mac Drive using 'Restore' Option of Disk Utility:

Note: The backup copy created using Disk Utility is not bootable. This Backup copy is a disk image from which you can easily restore the entire data of your source Mac drive. However, if you want to create a bootable clone of your Mac hard drive, you can use Stellar Drive Clone software.
Stellar Drive Clone is a Mac cloning utility, using which you can create an exact clone of your Mac hard drive so that in case of drive failure, you can continue your on-going works by booting from the same. Along with this, this utility provides options to create clone or image of Mac volumes as well as selected region of your hard drive.
Stellar Mac Tools leaders in Mac Utilities to help you Manage, Maintain and Optimize your Mac Sitemap 