Erased/formatted FileVault drive

Discussion in 'MacBook Pro' started by Jimmymck, Feb 2, 2013.

  1. Jimmymck macrumors newbie

    Jimmymck

    Joined:
    Dec 18, 2008
    #1
    This morning I decided to do a clean install of Mountain Lion. I booted into disk utility and then formatted the hard drive.

    However, I forgot that I had FileVault enabled. Now I can't do anything!

    Any ideas?
     
  2. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #2
    What do you mean you cannot do anything? If you have a backup, repartition the drive which I believe should drop the encryption and reinstall the OS.

    Other then that you can try to recover the key from apple.
    FileVault knowledgebase http://support.apple.com/kb/HT4790
     
  3. bogatyr macrumors 65816

    Joined:
    Mar 13, 2012
    #3
    If you formatted the drive, you should be able to do your clean install without any issue. What exactly is the problem?

    Disk Utility won't format the drive without the password. Once formatted it isn't encrypted unless you chose an encrypted filesystem format. Again, you would have to enter the key to do this format and you would have said key.
     
  4. Jimmymck thread starter macrumors newbie

    Jimmymck

    Joined:
    Dec 18, 2008
    #4
    There's no way of creating a new partition as it says its a locked disk, and if I click on reinstall OS X it doesn't come up with a disk to install to.

    Disk utility just comes up with (see photo)

    ImageUploadedByTapatalk1359823566.011080.jpg
     
  5. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #5
    I think you are going to need to boot from another partition of some sort, like a USB key... to get to that drive and reformat it. Do you have a Time Machine backup maybe you can boot to? Or a bootable USB key?

    Do you have access to another Lion or Mountain Lion Mac you could use with this utility and a 1GB (or larger) USB key to make a bootable key.

    Once you boot from the USB key, you should be able to select the drive (like 1TB Seagate or whatever) and erase the entire drive, then start over.

    I think what you are seeing there is the remains of the encrypted core storage volume created by FV2.

    As you have no doubt realized now, you should have unencrypted FV2 before you did this.
     
  6. Jimmymck thread starter macrumors newbie

    Jimmymck

    Joined:
    Dec 18, 2008
  7. Weaselboy Moderator

    Weaselboy

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    California
    #8
  8. Jimmymck thread starter macrumors newbie

    Jimmymck

    Joined:
    Dec 18, 2008
    #9
    I did this. It went away.

    Terminal:

    diskutil list

    Find for the disk you want to format disk0, disk1, disk2,...
    Disk 0 is usually the one you are booting your os x so dont use that
    I closed all mounted virtual volumes
    name: partition name
    JHFS+: format type

    diskutil eraseDisk JHFS+ name disk2
     
  9. Weaselboy Moderator

    Weaselboy

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    Jan 23, 2005
    Location:
    California
    #10
    Thanks. This was from Terminal while booted to Recovery HD?
     
  10. Jimmymck thread starter macrumors newbie

    Jimmymck

    Joined:
    Dec 18, 2008
    #11
    Yes, i should have known. Kicking myself now!
     
  11. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #12
    Heh... half the lessons I have learned were from screwing things all up! :D

    FV2 does something odd to the recovery partition that makes the entire drive look like a logical volume. This screenshot of DU on my system does not even show the physical drive.

    [​IMG]
     

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