I erased the wrong drive

Discussion in 'iMac' started by clauditorium, Dec 21, 2016.

  1. clauditorium macrumors newbie

    Joined:
    Aug 8, 2010
    #1
    I want to sell my old iMac, so I tried to erase my hard drive. I started it using Internet Recovery. However, instead of selecting the SATA Internal Physical Volume, I selected the Internal Physical Disk and hit "Erase". It seems to have screwed things up. The SATA Volume is now grayed out and shows as having zero KB free. I tried restoring it and First Aid and it didn't work. Any ideas? I will gladly provide more info if needed.
     
  2. chscag macrumors 68000

    Joined:
    Feb 17, 2008
    Location:
    Fort Worth, Texas
    #2
    Do you have the original disks that came with your iMac (assuming it came with disks)? That would be the easiest way to reinstall the version of OS X that came with it. If not, you can try Internet Recovery which will install the version of OS X that your machine had from the factory. Since you didn't tell us which iMac you have it's kind of hard to offer specific advice.
     
  3. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #3
    Sorry, I can provide more info. It's a 2010 iMac. There are no disks. And it doesn't let me reinstall via Internet Recovery. I just ran First Aid again on the Internal Physical Disk to get you details on what's wrong. Here's the message I get: "First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery." Except, that's what I just tried to do!

     
  4. chscag macrumors 68000

    Joined:
    Feb 17, 2008
    Location:
    Fort Worth, Texas
    #4
    It looks like you may have to swap out that disk if you can't repair it with Disk Utility First Aid. There is other software you can try but generally it's probably not going to work any better and is expensive. The ifixit web site has good instructions on how to change that hard drive (www.ifixit.com). Getting into an iMac is a rather difficult task if you've never done it before. Also, your 2010 iMac uses a special hard drive with temperature sensor. You'll need to buy a special cable to compensate for that temperature sensor or the hard drive fan will rev up to full rpm when you swap out the drive. The cable is sold by Mac Sales. (www.macsales.com)

    If all that sounds like too much work, just go ahead and sell your iMac as is with the defective hard drive. That means less money on the sale but doing the repair may not be worth your time and energy.
     
  5. Fishrrman macrumors G3

    Joined:
    Feb 20, 2009
    #5
    You need a way to boot the iMac from an external drive, then run Disk Utility, and then install a clean copy of the OS.

    Do you have one now?
     
  6. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #6
    You mean using the target disk method? I do have a new mac.

     
  7. zhaoxin macrumors regular

    Joined:
    Jan 28, 2015
    #7
    You should make a usb install disk of macOS. Just looking for How to make a usb boot os x install disk.

    Then boot from that disk to install os x.
     
  8. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #8
    Formatting the drive like you mentioned earlier, the disk rather than just the volume, is not a problem and did not cause this. It sounds like you have a bad drive and it needs to be replaced.

    Are you sure you are booting to "Internet recovery" and not just regular recovery? There is a difference.

    Internet recovery (which your 2010 iMac does support) is accessed by holding command-option-r at boot. That should bring up a screen where you select your wifi, then you should see a grey screen with a spinning globe while the recovery utility downloads. Once that is done you will see the recovery screen. From there try using Disk Utility to repair and format the drive.
     
  9. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #9
    Yes, I've been using Internet recovery. As you say, there might be a problem with the drive. I am investigating this.

     
  10. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #10
    Thanks for the idea. I tried it, but the computer usb boot disk I made isn't showing up for me to boot from it.

     
  11. phpmaven macrumors 68040

    phpmaven

    Joined:
    Jun 12, 2009
    Location:
    San Clemente, CA USA
    #11
    Just visit the following site: http://diskmakerx.com/
    Used that tool many times. Always works great.
     
  12. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #12
    Thank you. I'm sure it works great normally. But I just tried it, and my computer doesn't recognize the USB startup disk as an option. My physical hard drive might need to be replaced.

     
  13. phpmaven macrumors 68040

    phpmaven

    Joined:
    Jun 12, 2009
    Location:
    San Clemente, CA USA
    #13
    I'm assuming that your not putting USB stick into a USB hub but directly into one of the ports on the Mac itself. Also, I would try another USB stick, or another port. It shouldn't matter if there's a problem with physical drive, it should still come up as a bootable drive when you start up holding down the option key. Have you also tried booting while holding down "C"? That should try to boot from the USB stick.
     
  14. clauditorium thread starter macrumors newbie

    Joined:
    Aug 8, 2010
    #14
    Yes, I'm putting the USB directly into the Mac. I don't have any other USB sticks that have a large enough capacity to be used as startup disks. I just tried holding down "C", and it did not work.
    I have an update, which might shed some light on the issues. Apparently my graphics card is broken. I am only able to start my computer in safe mode or in internet restore mode...

     
  15. macpro2000 macrumors 6502a

    Joined:
    Apr 20, 2005
    #15
    If you're putting the USB drive in directly that was made correctly, there's more that's screwed up besides a HDD.
     

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