Sleep: Your computer runs in a very low power state and the RAM modules still get power, therefore
retaining its contents. Resuming from sleep is quicker.
Hibernate: The contents of the RAM are written to a file on the hard drive and the mahine shuts down
completely. Resuming from hibernate is quicker than a cold boot, but slower than a resume from
sleep.
Thanks. So does it mean that if my system was running the Defrag or
downloading, these acitivities will be aborted when the system hibernates or
sleeps?
What do I need to do with my power management settings if I have some tasks
(such as O&O defrag, Norton Ghost and Norton Virus Scan) set up to run in the
wee hours after I go to sleep? Can I allow the PC to sleep? Hibernate? I
ask because it appears that right now, none of these tasks is being carried
out.
WRONG !!...How do you explain then if the computer wakes up by itself from
Hibernation...?? Mine does it everytime I put it to hibernation...It still
draws some minimal power to run something in the background...It wont wake up
if you remove and re install the battery which then loses it's memory
contents....
That definition applies to versions of Windows prior to Vista. Vista uses a
sleep or hybrid sleep mode. Sleep mode is what the majority use, and likely
yourself as well since the contents of ram are lost when you remove the
battery. The hybrid mode is closer to the true hibernate, but is disabled on
most systems - particularly laptops. Regardless of which you use, some
components will remain charged by a trickle from either the psu or cmos
battery, and many support a 'wake' feature that can reinitiate the os.