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I recently tried to install a bootcamp instance of Win 7. The install failed for some reason. This left me with a partition that I can not access via Disk Utility enter image description here

If you notice..the +- can not be selected and hence I can't delete the partition and recover the space on my drive

I tried to follow the instructions posted here by klanomath but have had no success.

It could be because I have 2 CoreStorage logical volume groups about which I have no clue as to what it is

Klanomath...can you please help me out???

diskutil list--

diskutil list

diskutil cs list--

diskutil cs list

sudo gpt -r -vv /dev/disk1--

enter image description here

  • did you try in Debug menu ? – Ruskes Feb 19 '15 at 2:27
  • I really dont know how to – Omaer Sheikh Feb 19 '15 at 2:41
  • to enable the debug menu, use terminal "defaults write com.apple.DiskUtility DUDebugMenuEnabled 1" – Ruskes Feb 19 '15 at 2:49
  • And what will this do? – Omaer Sheikh Feb 19 '15 at 2:54
  • not much, as the name says it is used for debugging, and to show all hidden partitions. A question to you, do you have 2 OS X versions installed ? – Ruskes Feb 19 '15 at 2:58
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Something went totally wrong and your Logical Volume Group is fragmented. You have to rebuild your Fusion Drive from scratch:

Preparation:

  • Backup "Macintosh HD" to an external drive with Time Machine
  • Detach any external drive (especially your external Time Machine backup drive)
  • Restart to Internet Recovery Mode by pressing alt cmd R at startup.
    The prerequisites are the latest firmware update installed, either ethernet or WLAN (WPA/WPA2) and a router with DHCP activated.
    On a 50 Mbps-line it takes about 5 min (presenting a small animated globe) to boot into a recovery netboot image which usually is loaded from an apple/akamai server.

    I recommend ethernet because it's more reliable. If you are restricted to WIFI and the boot process fails, just restart your Mac until you succeed booting.

    Alternatively you may start from a bootable installer thumb drive (Yosemite) or a thumb drive containing a full system (Yosemite).

Rebuild Fusion Drive

  • Booted to Internet Recovery Mode open Utilities → Terminal in the menubar and enter:
    diskutil cs list to get the CoreStorage listing.
  • Copy the second Logical Volume Group UUID, it's the seventh listed in the listing of diskutil cs list.
  • Then delete the second Logical Volume Group with diskutil cs delete LVG2UUID.
    In your case: diskutil cs delete E0E4516A-DE3A-4B62-BE6A-855A760F5E3E
  • Copy the Logical Volume UUID it's the sixth UUID listed
  • delete the Logical Volume with diskutil cs deleteVolume LVUUID.
    In your case: diskutil cs deleteVolume 00CDC215-F00D-4AD4-BA78-A2B220278688
  • Copy the first Logical Volume Group UUID, it's the first listed in the listing of diskutil cs list.
  • Then delete the first Logical Volume Group with diskutil cs delete LVGUUID.
    In your case: diskutil cs delete 8FCBCB92-43CC-45A2-A058-58CAF79B93B4
  • Enter exit and quit 'Terminal'
  • Open 'Disk Utility'. Enter 'Ignore' if you are asked to fix the drives.
  • Choose your SSD and partition it: 1 Partition Mac OS X Extended (Journaled), hit the Options button and choose GUID Partiton table and hit OK and Apply.
    Please check that the size is ~121 GB

    Example:
    Beware! Since I took the screenshots in a virtual machine which couldn't be booted to Internet Recovery Mode i had to create two example disks with different disk identifiers and sizes. So don't use my UUIDs and disk identifiers recreating your Fusion Drive.

    ssd

  • Choose your HDD and partition it: 1 Partition Mac OS X Extended (Journaled), hit the Options button and choose GUID Partiton table and hit OK and Apply.
    Please check that the size is ~3 TB

    Example:

    hdd

  • Quit Disk Utility and open Terminal

  • Enter diskutil list

    Example (your disk identifiers and sizes are different of course: Your volume SSD probably has the Identifier disk0s2 and the size 121 GB and your volume HDD probably has the Identifier disk1s2 and the size 3.0 TB):

    diskutil

  • Enter diskutil cs create "Name" IdentifierSSD IdentifierHDD
    In your case probably diskutil cs create "Macintosh HD" disk0s2 disk1s2.

    Copy the resulting LVGUUID

    Example:

    cscreate

  • Enter diskutil cs CreateVolume LVGUUID jhfs+ "Macintosh HD" 100%.

    Example:

    lvcreate

  • Enter diskutil cs list
    Check the size of your Logical Volume. It should have the size ~3.121 TB

    Example:

    diskcslist

  • Quit Terminal

  • Open 'Disk Utility' and check your newly created volume for errors
  • Quit 'Disk Utility'

Restoring "Macintosh HD" from Time Machine backup (alternatively you may reinstall OS X and migrate your users and apps - see below)

  • Attach your external Time Machine backup drive or check this answer if you use NAS or another network share.
  • Open 'Restore from Time Machine Backup'

    enter image description here

  • Choose the appropriate Time Machine backup and restore your system
    The messages on your screen may differ slightly (different names and backup source)

    enter image description here enter image description here enter image description here enter image description here

  • Reboot to your restored system.
  • Unmount and detach your Time Machine backup drive
  • Open 'Terminal' and enter 'diskutil list'
  • Check if your 'Recovery HD' is listed.
  • If your 'Recovery HD' is missing, usually reinstalling your current system with the latest available system installer (e.g. 'Install OS X Yosemite (10.10.2)' if Yosemite is currently installed) will recreate it without loosing any data. AFAIK Recovery Partition Creator 3.8 will NOT create a Recovery HD on CoreStorage volumes.
  • After reinstalling the system with the latest available system installer open App Store and install the latest security fixes.

Reinstalling Yosemite from scratch and migrating apps & data from Time Machine backup

  • Choose "Reinstall OS X"

    Reinstall OS X

  • Choose "Macintosh HD" as destination disk
  • after the download, installation and a restart the Setup Assistant will ask you - beyond other questions - to migrate users, apps and other data
  • attach your Time Machine Backup drive and wait a few seconds
  • choose "Migrate from Time Machine backup" (or something similar - i don't remember the precise message.)
  • finish the migration
  • start App Store.app and install the latest updates.
  • FYI, it isn't that the mods personally don't like extended commenting, it's that the system isn't set up for it. – Daniel Feb 21 '15 at 15:21
  • @DanielLawson Ok next time i will use that as explanation ;-) – klanomath Feb 21 '15 at 15:24

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