Incorrect Partition Size

Discussion in 'macOS High Sierra (10.13)' started by yourmn, Feb 10, 2018.

  1. yourmn macrumors regular

    yourmn

    Joined:
    Jun 28, 2010
    Location:
    United Kingdom
    #1
    Hi

    I have an iMac with a 1TB Fusion Drive. 1 Only have 1 partition on the drive, but for some reason it is only listing it as 469GB.

    I done 'First Aid' a few times, and tried to create a new partition, however that keeps failing. Any ideas?
     

    Attached Files:

  2. Darmok N Jalad macrumors 68000

    Darmok N Jalad

    Joined:
    Sep 26, 2017
    Location:
    Tanagra
    #2
    Click on "View" in the corner and select "Show all devices." Almost seems like you have another partition in there that isn't showing, but the more detailed view might shed some more light on the situation.
     
  3. dianeoforegon macrumors 6502a

    dianeoforegon

    Joined:
    Apr 26, 2011
    Location:
    Oregon
    #3
    I don't believe you are allowed to add more than one partition on a fusion drive with core storage.
     
  4. BLUEDOG314 macrumors 6502

    BLUEDOG314

    Joined:
    Dec 12, 2015
    #4
    Go into terminal and type 'diskutil cs list' and paste what it says here.
     
  5. yourmn thread starter macrumors regular

    yourmn

    Joined:
    Jun 28, 2010
    Location:
    United Kingdom
    #5
    Finally got Disk Utility to show the correct file size by erasing through CMD + R!

    Next problem - I cannot reinstall High Sierra! It’s getting as far as “about a minute remaining” and telling me that an error occurred while preparing the installation.

    Any ideas?
     
  6. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #6
    "Next problem - I cannot reinstall High Sierra! It’s getting as far as “about a minute remaining” and telling me that an error occurred while preparing the installation.
    Any ideas?"


    Yup. Here's one:
    Create a bootable USB flash drive with the installer on it.
    You'll need Boot Buddy, from here:
    Boot Buddy – sqwarq
    Format the flash drive (can be 8gb or 16gb) to HFS+ with journaling enabled.
    The use BB to create the installer (takes only a few clicks of the mouse).

    Next step:
    Boot from the flash drive installer, but DON'T run the install yet.
    Instead, quit the installer and open Disk Utility.
    Now, ERASE the internal drive to Mac OS Extended with journaling enabled.
    Quit Disk Utility and re-open the installer.

    Then... try the install that way. There will be some restarts, and it will take some time, but...
    ... things may go much easier.
     
  7. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #7
    You can't in Disk Util, but Bootcamp will carve out a partition for Windows. That seems to be the source of all the forum posts I have seen with the issue OP has here.
     

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6 February 10, 2018