PC Hibernation vs Mac Sleep

remain said:

So your MBP has never gone into Deep Sleep?? (You never saw that bar when re-opening?)

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Nope. It usually sleeps overnight, too, I've never seen that bar.

So how exactly is Safe Sleep triggered under normal circumstances?

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I'm not sure - I get the impression it won't ever be triggered unless those terminal commands are run.

And what are these hacks you speak of?

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Those terminal commands, and fiddling around in NVRAM, unless I'm missing something - not exactly a user-friendly way of enabling it. I'd prefer a Deep Sleep option when you press the power button, or to configure it to deep sleep when the lid closes.

Wow that cool, i never knew you could leave your mac on for days, weeks etc...i thought it would get to hot or something....

remain said:

I thought Macs DO have a "Hibernate" mode, called "Safe Sleep."

http://docs.info.apple.com/article.html?artnum=302477

http://en.wikipedia.org/wiki/Hibernate_(OS_feature)#Mac_OS

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The Apple site article does not tell you how to induce "Safe Sleep". So how do you?

This article tells you how to change the sleep mode on your computer. I used it to change from the default sleep mode to the older sleep mode (so it goes to sleep faster)

http://www.macworld.com/weblogs/macosxhints/2006/10/sleepmode/index.php

Nice.

That article links to this one, which explains Safe Sleep and how it turns on normally (without the Terminal stuff).

http://www.macworld.com/weblogs/mac911/2006/10/safesleep/index.php

Basically, when you close the lid, it does Sleep AND Safe Sleep, in a manner of speaking.

It goes to Sleep BUT also saves everything to the RAM.

If you don't lose power before re-opening the power, it'll just wake from Sleep normally.

If you DO lose power, then it'll load the saved session from the RAM.

I guess that's why some people have never seen that "wake up from Safe Sleep" bar.

RAM is wiped when power is lost. Hence power still needed for Sleep. If you lose power you're not getting anyhitng from RAM.

D'oh! To the HD, I meant.



It goes to Sleep BUT also saves everything from the RAM to the HD.

If you don't lose power before re-opening the power, it'll just wake from Sleep normally.

If you DO lose power, then it'll load the saved session from the HD.