clone critical servers

Hi list, I have some critical servers and i would want to clone it to have a secure image. I would want to use this images to have a secure image of my files and to use it to recover the server if the disck fail. I have found this bootable iso cd http://www.sysresccd.org/ that have partimage. Is this for you a good solution or there is other better way ? Thanks, Cristian Del Carlo