Played with corestorage, missing 121g now

Discussion in 'OS X Yosemite (10.10)' started by tyrlian, Nov 12, 2015.

  1. tyrlian macrumors newbie

    Nov 12, 2015

    Late 2013 iMac 1TB fusion drive 10.10.2

    So I worked out my bootcamp drive didn't have enough space assigned to it, and I've been trying to resize it without formatting it (I've given up on that)
    One of the methods I came across involved resizing the corestorage of the mac HD to free up space, then expanding the volume in windows partition. However, once I'd resized it it wasn't accessible in windows.
    Erasing the bootcamp partition in disk utility, it crashed and now the partition is there when using diskutil cs list, but disk utility won't pick it up in the GUI.
    The hard drive in the GUI is showing the full 1TB fusion drive, but the Mac HD partition is capped at 728g and I can't seem to resize it anymore.

    CoreStorage logical volume groups (1 found)


    +-- Logical Volume Group 5DE0107A-40C6-40FB-91AB-44C3F032343A
    Name: Macintosh HD
    Status: Online
    Size: 1120333864960 B (1.1 TB)
    Free Space: 383826526208 B (383.8 GB)
    +-< Physical Volume 45D69DFE-5540-4FF5-AE32-C60E4E44CB0A
    | ----------------------------------------------------
    | Index: 0
    | Disk: disk0s2
    | Status: Online
    | Size: 120988852224 B (121.0 GB)
    +-< Physical Volume CCEF195E-35AD-4051-9CAE-BACF7BDB76DD
    | ----------------------------------------------------
    | Index: 1
    | Disk: disk1s2
    | Status: Online
    | Size: 999345012736 B (999.3 GB)
    +-> Logical Volume Family E5CB30E4-DAB8-4246-9B2D-B19403D60BFC
    Encryption Status: Unlocked
    Encryption Type: None
    Conversion Status: NoConversion
    Conversion Direction: -none-
    Has Encrypted Extents: No
    Fully Secure: No
    Passphrase Required: No
    +-> Logical Volume BDAB228D-6617-47A2-B392-2BEB1CFD1927
    Disk: disk2
    Status: Online
    Size (Total): 727999971328 B (728.0 GB)
    Conversion Progress: -none-
    Revertible: No
    LV Name: Macintosh HD
    Volume Name: Macintosh HD
    Content Hint: Apple_HFS

    disk0s2 is the old bootcamp partition and diskutil won't let me reformat it, or delete it to try and merge it back in with the OSX partition

    Anyone have any thoughts on how to fix this without burning everything and starting over again?
    I want to get my drive back to normal, and then repartition using bootcamp giving myself a larger windows drive
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    You cannot resize a core storage volume like that is Disk Utility. There is a way to do it from Terminal, but it is a real hassle. You can read about it here.

    What I would do it just clone it off and nuke then start over. You can do that by a command-option-r boot to Internet recovery. Once the globe is done spinning and you are in recovery, go to the Utilities menu and launch Terminal then enter the command below. That will kill the Fusion drive.

    diskutil cs delete "Macintosh HD"
    Then quit Terminal and start Disk Utility. You will get a popup message asking if you want DU to fix the Fusion drive. Tell it yes then wait until it is done. Now reboot to your clone and copy everything back.
  3. tyrlian thread starter macrumors newbie

    Nov 12, 2015
    Yeah, those terminal commands to manipulate the corestorage were what got me into trouble, guess I'll just clone off and kill. Cheers

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