Erase encrypted external drive

Discussion in 'OS X Yosemite (10.10)' started by Siron, Jun 15, 2017.

  1. Siron macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #1
    I have a Toshiba 1TB external drive that I encrypted. When I plug it in, it asks for the password but it won't accept it and I know it's the correct one as I've been accessing it. I don't care about losing the data so I want to erase it but DiskUtility won't let me - can't mount it, erase it nothing

    I even tried it in Terminal with diskutil cs delete
    3BDD1407-8142-4CA8-87E8-86E131162F8F

    I get this message:

    Started CoreStorage operation

    Ejecting Logical Volumes

    Destroying Logical Volume Group

    Error: -69783: Unable to delete the CoreStorage Logical Volume Group

    Can anyone please help?
    Thanks
    Alan
     
  2. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #2
    Even though the volume is not mounted, can you see the drive it self above that like in my screenshot? You should be able to select that then in the erase tab reformat the entire disk.

    Screen Shot 2017-06-15 at 9.16.14 AM.png
     
  3. Siron thread starter macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #3
    I can see the volume but it's grayed out. I can select it and hit the Erase button and the Erase functions gray out and I get an error message
    Alan

    Screen Shot 2017-06-15 at 1.16.46 PM.png Screen Shot 2017-06-15 at 1.17.12 PM.png Screen Shot 2017-06-15 at 1.17.33 PM.png
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    Try this in Terminal.

    Code:
    diskutil cs delete /Volumes/TOSHIBA\ EXT
     
  5. Siron thread starter macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #5
    Okay here's the result

    diskutil cs delete /volumes/TOSHIBA\ EXT

    /volumes/TOSHIBA EXT does not appear to be a valid Core Storage Logical Volume Group UUID or name

    Removed the \

    NAME's-Air:~ NAME$ diskutil cs delete /volumes/TOSHIBA EXT

    Usage: diskutil coreStorage delete lvgUUID|lvgName

    Delete a CoreStorage logical volume group. All logical volumes will be removed.

    Ownership of the affected disks is required.

    It's still grayed out in Disk Utility.

    Thanks
    Alan
     
  6. UL2RA macrumors 6502a

    UL2RA

    Joined:
    May 7, 2017
    #6
    Have you tried selecting the main partition and not the sub-partition?
    --- Post Merged, Jun 15, 2017 ---
    Also, you can try a third-party partition app like this: https://www.paragon-software.com/home/hdm-mac/

    The trial should work fine.
     
  7. Siron, Jun 15, 2017
    Last edited: Jun 15, 2017

    Siron thread starter macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #7
    I cannot do anything with the main drive - only the partition. I'll try that software. I'm still baffled as to why it won't accept a valid password that I used three times before.
    Alan

    Edit: Don't see a trial version on that webpage

    Edit: Found the MacWipe for free.
     
  8. UL2RA macrumors 6502a

    UL2RA

    Joined:
    May 7, 2017
  9. Siron thread starter macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #9
    It seems I have to create a bootable USB drive to allow the disc wipe to work. How about booting to disk utility and doing it from there?
    Alan
     
  10. UL2RA macrumors 6502a

    UL2RA

    Joined:
    May 7, 2017
    #10
    Sorry about that ... that app absolutely does not do what I thought it did. You can try booting into recovery mode and using Disk Utility there. Or you can try the USB thing, but I'm not sure what the trial allows.
     
  11. Siron thread starter macrumors 6502

    Siron

    Joined:
    Feb 4, 2008
    Location:
    North Carolina
    #11
    For some reason the link sent me to their main page. I found the link to the free trial of Hard Disc Manager. I'll try if today. I hope it will let me erase free space on my MacBook Air's hard drive as the Mac utility said I don't have enough free space to create a temporary file, yet it creates one and appears to be erasing free space for ten minutes until it finishes and says it cannot create a temp file - strange as you would have thought I'd get that message to start with.
    Alan
     

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