Defective hard disk?

Discussion in 'iMac' started by Mac Hammer Fan, Oct 7, 2018.

  1. Mac Hammer Fan macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #1
    A friend of mine has an iMac early 2008. The computer hangs while booting. When I boot in the recovery mode and I use disk utility it says the disk is OK. But Smart Utility detects an "unrecoverable error". Is it still possible to erase the disk and do a clean install or is this a waste of time?
    https://www.volitans-software.com/apps/smart-utility/
    TIA
     
  2. nambuccaheadsau macrumors 68000

    nambuccaheadsau

    Joined:
    Oct 19, 2007
    Location:
    Nambucca Heads Australia
    #2
    SMART tells no lies, but by all means try an erase and install.

    Programs such as Disk Warrior may help,. but over $100 better to put the cash towards a new drive if it fails.
     
  3. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #3
    The easiest way to tell "if it's the drive" or "if it's the computer" is to boot from an EXTERNAL drive that is "bootable to the finder".

    If you don't have one -- make one.
     
  4. Mac Hammer Fan thread starter macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #4
    I can boot from an external drive. I was able to restore the Users folder to an external harddrive. Disk utility finds no errors.
     
  5. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #5
    If you can boot from an external drive, then you know the Mac hardware (other than the internal hard drive) is ok.

    I would:
    1. Get whatever I can from the internal, save it somewhere else
    2. ERASE the internal using Disk Utility
    3. Run DU's "repair disk" function on the just-erased drive
    4. Do you get "a good report"?
    5. If so, REPEAT "repair disk" 5 times -- do you get a good report each time?
    6. If so, re-install a copy of the OS and try again.
     
  6. mikehalloran macrumors 65816

    Joined:
    Oct 14, 2018
    Location:
    The Sillie Con Valley
    #6
    S.M.A.R.T errors are a 100% indicator that an HHD is bad.

    Only do the above if you want to waste a lot of time. The drive is what, 11 years old? Replace the drive. It is toast. Even if you get it showing ok in Disk Utility, the only advantage is that you'll be able to get all your data off. If you have a recent Time Machine backup, don't bother.

    As for running repair Disk in Disk Utility, it repairs one problem at a time. Look to see if the error is identical—usually, it's a little different. If so run it again. Get the same error 3x in a row, give it up.

    Let's say you get everything up and running. Prepare to do it again within 2 weeks—that's the longest I've seen. 10 hours or less is more likely.

    DiskWarrior cannot help you do anything except waste $100. All it does is back up and rewrite the directory. It cannot fix anything caused by a disk error. It's only useful as a diagnostic tool — it sometimes finds bad drives before Disk Utility does.

    I put an SSD in my daughter's 2008 iMac a number of years ago. Hers dual-boots into El Cap and 10.6.8 for an app she likes that was never updated further.

    All you need are a few tools, the drive and one of these brackets. Replace the BR2032 battery while you're at it. These are very easy to do.

    [​IMG]
     

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5 October 7, 2018