Noisy HDD in new 27" iMac

Discussion in 'iMac' started by retrostate, Mar 24, 2013.

  1. retrostate macrumors newbie

    Oct 8, 2011
    Bristol/Swansea UK
    Hey all, just received my new 2012 iMac i7, 1TB Fusion Drive, 680mx, 8GB

    I've noticed that when it's idling i can hear the HDD like you would on a tower PC. It never 'sleeps' the HDD when the machine is not doing anything.

    The sleep function works just fine, the machine goes to sleep and all noise stops, but i would have assumed that the HDD was meant to sleep when the machine is idle just like my MBP does.

    I also have a very annoying high frequency noise, which after doing some snooping here seems to be related to CPU low clock speed state when idling. Other than stopping the CPU going to idle clock speeds, did anyone find out if there was fix or is this a matter for apple care?
  2. rkaufmann87 macrumors 68000


    Dec 17, 2009
    Folsom, CA

    The drive is probably just indexing itself, give it a couple of days to settle down. Until then relax. If the noise continues you have 90 days of AppleCare, give them a call if the noise continues.
  3. tom vilsack macrumors 68000

    tom vilsack

    Nov 20, 2010
    ladner cdn
    -hard drive must be indexing
    -high pitch noise could be anything? id give it a couple weeks.
  4. Giuly macrumors 68040


    Do you have 'Put hard disk(s) to sleep when possible' enabled under Energy Saver in the System Preferences?

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