Just to check I am making a wise decision. Using the widget Deep Sleep (or the terminal) i have decided to disable safe sleep. What it is: Safe sleep is where the RAM is written to the HD before sleeping so if power is lost the RAM can be recovered (like hibernation) - BUT the RAM is kept live during the sleep so the computer can wake fast. Normal sleep (what i have switched to) is where the RAM is kept live but not written to HD. Deep sleep is just hibernation, RAM written to HD and power cut to RAM. My reasoning for turning it off: I am running a new MBP so the chances of losing power are low as the battery cant just fall out (not that it does that on other MBPs). I have 8GB of RAM so when i close the lid it can take a good 2 mins to actually sleep. Often when i close the lid i am moving the computer (into a bag or whatever), so surely writing to the HD could cause it to break or become damaged (I regally hear the clicking of the HD as it stops due to the sudden motion sensor). The fans are on while it is in my bag, annoying and makes me think it might just explode or something (unlikely ) What do you think? EDIT: My method of thinking is that a power outage is unlikely and recoverable; but a HD crash (due to moving writing HD while trying to sleep) could cause big problems - I understand it has a SMS but this is not failsafe.