i want to make a full backup from my HDD and also encrypted. i think disk utility is good enough but i have a question. if i make the image backup when system is started (from application menu) it will be good to restore later or i have to backup from installer disk and when system is not loaded ? (as explained here : http://support.apple.com/kb/ht1553 ) for a good backup i have to use installer disk's disk utility ??