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  1. #1
    Hibernation turned off?

    Member Since
    Jul 26, 2009
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    Hibernation turned off?
    Just installed an SSD in my MBP. How do I know if hibernation is turned off? Does the blinking light indicate on the lower right front of the case indicate hibernation? I still have that even after entering the sudo command in terminal. I always keep my Mac plugged in, and kept on 24/7. Any input appreciated. Thanks.

  2. #2
    Hibernation turned off?
    McYukon's Avatar
    Member Since
    May 14, 2009
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    Near Whitehorse, Yukon
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    I'm not sure exactly what your question is, since your Mac will always be in some state of hibernation if you have the lid closed.

    Run
    Code:
    pmset -g live
    Look for the line:
    hibernatemode
    The number following hibernatemode will be one of the below.
    hibernatemode = 0 (binary 0000) by default on supported desktops. The
    system will not back memory up to persistent storage. The system must
    wake from the contents of memory; the system will lose context on power
    loss. This is, historically, plain old sleep.

    hibernatemode = 3 (binary 0011) by default on supported portables. The
    system will store a copy of memory to persistent storage (the disk), and
    will power memory during sleep. The system will wake from memory, unless
    a power loss forces it to restore from disk image.

    hibernatemode = 25 (binary 0001 1001) is only settable via pmset. The
    system will store a copy of memory to persistent storage (the disk), and
    will remove power to memory. The system will restore from disk image. If
    you want "hibernation" - slower sleeps, slower wakes, and better battery
    life, you should use this setting.
    I assume you have a SSD in the optical bay, so hibernatemode 0 is what you are looking for.
    Otherwise OS X cannot find the sleep image when trying to wake up, since it always looks for the sleep image in the normal HD mount point.
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