How To Delete/Erase an Encrypted Partition

Discussion in 'macOS' started by ghsNick, Sep 1, 2014.

  1. ghsNick macrumors 68030

    ghsNick

    Joined:
    May 25, 2010
    #1
    Hi Guys!

    I recently tried erasing my external hard drive because I need to partition it to hold additional information.

    I encrypted my Time Machine portion and now it won't let me unmount or erase in Disk Utility.

    Can someone please help me delete this? It's been "decrypting" forever.
     
  2. marzer macrumors 65816

    marzer

    Joined:
    Nov 14, 2009
    Location:
    Colorado
    #2
    https://derflounder.wordpress.com/2013/06/29/erasing-a-filevault-2-encrypted-volume/
    I've ran into that before. Disk Utility program is too "over protective" of encrypted partitions. I think it's unnecessary but for now it is what it is. In the past the only solution I found, other than waiting on full decryption, is to delete the partition using diskutil at the command line. Of course, backup any data you need to keep.

    Here's instructions:

    https://derflounder.wordpress.com/2013/06/29/erasing-a-filevault-2-encrypted-volume/

    BTW, this is an easy no-fuss way to quickly destroy any core storage volume.
     
  3. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #3
    Just run the command below in Terminal and substitute the name of the external volume you want to nuke. Be sure to include the quotes.

    Code:
    diskutil cs delete "name_of_drive"
     

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