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  1. #1


    Member Since
    Apr 25, 2009
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    43
    Turning off 3rd party drives
    Is there some way to turn off an external drive when I put my iMac to sleep? I am using it for Time Machine, and it will run constantly if not turned off. I have a Hitachi 1T drive with an Acommdata case which has a manual power switch in the back.

    Would leaving it on wear out the drive?
    mjshack

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
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    48,251
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    If you open System Preferences, Energy Saver, Power Adapter Tab, place a check mark in the box that says: "Put the hard disk(s) to sleep......"

    If the Hitachi can be put to sleep, that should resolve the problem.

  3. #3


    Member Since
    Apr 25, 2009
    Posts
    43
    I have already checked that, but no luck. Is it the drive or the case?
    mjs

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,251
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    It could be. Some drive carrier electronics which convert SATA to USB also prevent the drive from sleeping. If the Hitachi is a fairly new drive, I'm sure it could be put to sleep by your Mac if it wasn't being used in a carrier.

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