external hard disk not going to sleep (Yosemite 10.10)

Discussion in 'OS X Yosemite (10.10)' started by tiguanis, Oct 26, 2014.

  1. tiguanis, Oct 26, 2014
    Last edited: Oct 26, 2014

    tiguanis macrumors newbie

    Oct 26, 2014
    I just upgraded a mac mini (Late 2009) from 10.8 to 10.10. It has an external hard drive (Hitachi) attached via FW800.

    After upgrading to 10.10 the external hard drive will not go to sleep when I put the system to sleep. I did not have this problem before the upgrade.

    Has anyone heard about this for Yosemite?

    System info:
    Macintosh HD: Hitachi
    Processor: 2.53 GHz Intel Core 2 Duo
    Memory: 4GB 1067 MHZ DDR3
    Graphics: NVIDIA GeForce 9400 256MB
    External HD Case: OWC Mercury Elite
  2. ssls6 macrumors 6502a


    Feb 7, 2013

    The problem with FW800 started with Mavericks. Apple believes the Oxford chipsets have the potential for data corruption so no fix is coming. Consider investing in usb3.
  3. tiguanis thread starter macrumors newbie

    Oct 26, 2014
    I plugged in a usb cable to the external hard drive and it goes to sleep when the system goes to sleep now.

    I do not understand why a mac mini with an external drive connected via FW800 cable would not work.

    I have an iMac(27") running Yosemite with a Drobo connected via FW800 and that is working just fine.
    It goes to sleep and wakes up without any issues.

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