1 year ago i bought my MBA which came with lion and a recovery partition. I've read some guides on making a back up disk now i've upgraded to ML. Should i bother? I've noticed i have a 10.8 recovery partition too, is this sufficient? If so, why do people bother making a bootable USB stick or DVD with the OS on? The only thing i can think of is i remember reading you needed an internet connection to re-install from the recovery partition.