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  1. #1
    Partition failed with the error: Input/Output error
    Hey this is my first time posting and I attempted to search the archives, but I didn't run into an exact replica of my problem so I'm hoping someone could help.

    My hard drive crashed last week, so I bought a replacement drive (Western digital 320GB) and installed it today. I booted from the installation disk and attempted to partition the new hard drive in order to format it, but I was greeted with the error in the title of this post.

    I have all the options correct: Mac OS Extended (Journaled) and GUID, so I don't know what could be wrong. Is my new drive just faulty, or am I doing something incorrectly. Thank you for your assistance, I appreciate it.

  2. #2
    Partition failed with the error: Input/Output error
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    Your Mac's Specs
    2017 27" iMac, 10.5" iPad Pro, iPhone 7+, iPhone 8, Numerous iPods, Mojave
    Welcome to the Mac Forums.

    It sounds like you're not using the correct installation disk. Are you sure it's the disk for your machine? If you use a disk from another Mac it won't work.

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