Sleep modes of mobile Macs
There are three sleep modes for the lates Mac notebooks, pmset -g | grep hibernatemode shows the current state (should be “3” on notebooks, “0” on desktop machines).
The modes:
- Sleep Mode with data in RAM only (mode 0)
- Safe Sleep Mode with data in RAM and image on disk (default mode 3)
- Deep Sleep with data in image on disk only (no power consumption) (mode 1)
Changing the mode in Terminal: sudo pmset -a hibernatemode 0
The RAM image on disk can be found (and deleted with srm -s if needed) here: /var/vm/sleepimage
[via fscklog (German)]

