10-14-2016 12:44 PM
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  1. neel69's Avatar
    neel69
    I recently purchased 27 inch iMac 5K with one TB fusion drive. I formatted the hard drive using the OS X Utilities and after that I tried to install OS X Sierra. But it started showing errors. When I tried to check the hard drive status and tried reformatting the partition I am getting this error message: "Unable to delete the core storage logical volume". Also the Macintosh HD partition is greyed out and is marked as having 0GB free (which is false) and I am unable to select that partition to do a reinstall of OS X Sierra. I tried Alt-Command-R for, I suppose internet recovery but am still getting the same error. Any suggestions?
    09-28-2016 09:33 AM
  2. Ledsteplin's Avatar
    Ledsteplin
    Q&A Team
    Ambassador
    I have no clue. But I'll give you a little bump so others may reply.
    09-28-2016 09:48 AM
  3. neel69's Avatar
    neel69
    Ok. So I took it to the Service Centre. They had it formatted through Terminal. Now it's working fine.
    10-14-2016 12:44 PM
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