The most old fashion way to ghost-clone disks 🙂
DD
user : cat /proc/partitions to check your partitions
Remount (Write permission) if ur using usb device or cd rom
mount -n -o remount,rw /live/image
Save the image to /live/Imges/file.img
Create image
dd if=/dev/sda of=/mnt/sdb1/backup.img create
To extract the image :
dd if=/mnt/sdb1/backup.img of=/dev/sda