iMac hard drive spins during standby

Discussion in 'Mac Basics and Help' started by dhokes, Mar 10, 2017.

  1. dhokes, Mar 10, 2017
    Last edited: Mar 11, 2017

    dhokes macrumors regular

    Dec 5, 2012
    When I put my iMac in standby mode, the hard drive spins every couple of seconds. Why is this and how can I stop it?

    My Energy Saver options:

    • Put hard disks to sleep when possible (checked)
    • Wake for network access (unchecked)
    • Start up automatically after a power failure (unchecked)
    • Enable Power Nap (unchecked)

    • iMac (27-inch, Late 2012)
    • 3.12 TB Fusion Drive
    Hmm. So if I unplug my USB hub from my mac (Skiva Octofire Multi USB Charger) even though it doesn't have any devices connected to it, my hard drive doesn't spin during standby.
  2. satcomer, Mar 12, 2017
    Last edited: Mar 16, 2017

    satcomer macrumors 603


    Feb 19, 2008
    The Finger Lakes Region
    Because the consumer drive is writing to it's cache before sleeping!

    In your case it seems that don't recognize Mac OS Sleep command! That's what you get with a cheep external!

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