Clonezilla is a disaster recovery, disk cloning, disk imaging and deployment solution. Clonezilla is similar to Norton Ghost Corporate Edition.'Clonezilla Live' enables a user to clone a single computer's storage media, or a single partition on the media, to a separate medium device. The cloned data can be saved as an image-file or as a duplicated copy of the data. The data can be saved to locally attached storage device. The clone file can then be used to restore the original when needed.
The Clonezilla application can be run from a USB-flash-drive, a CD-ROM, or a DVD-ROM. Clonezilla requires no modification to the computer; the software runs in its own booted environment.
you will need to set your computer to boot from the CD/DVD drive,and start up/boot from this disc.