Nuke
Level 1 (80 points)

Q: filevault decrypt couldn't start decryption "err = -69755"

I've got a "paused" filevault decryption on OSX 10.10.5.  (iMac (21.5-inch, Mid 2011))

 

It was getting sluggish and so thought I would turn off filevault and it appears to have gotten stuck.

 

I've tried to follow a number of suggestions in other posts but not getting it to work.

 

What I tried:

1) reset pram, then reboot to recovery, use Disk Utility to unlock drive and then run repair.

2) reboot to recovery, use terminal to "fdesetup disable" in this case I get:

# sudo fdesetup disable

Password:

Enter a password for '/', or the recovery key:

.Error: couldn't start decryption: err = -69755

3) reboot to recovery, use terminal to "diskutil cs revert"

no luck

4) tried "fdesetup status" and get "FileVault is Off." ????  But from below list, encryption is still on and decryption is "paused"

5) running "diskutil cs list" gives:

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 78D93233-1558-4869-AF0A-A84F22149BCF

    =========================================================

    Name:         Macintosh HD

    Status:       Online

    Size:         999345127424 B (999.3 GB)

    Free Space:   0 B (0 B)

    |

    +-< Physical Volume C77610CC-A2ED-47E5-8AA2-5BCFB8BA16BC

    |   ----------------------------------------------------

    |   Index:    0

    |   Disk:     disk0s2

    |   Status:   Online

    |   Size:     999345127424 B (999.3 GB)

    |

    +-> Logical Volume Family EFC1FACF-C5BA-44AD-8354-4E56F4E7DDC7

        ----------------------------------------------------------

        Encryption Status:       Unlocked

        Encryption Type:         AES-XTS

        Conversion Status:       Converting

        Conversion Direction:    backward

        Has Encrypted Extents:   Yes

        Fully Secure:            No

        Passphrase Required:     No

        |

        +-> Logical Volume C501B6CC-CCCE-4495-A559-85501BEBA36E

            ---------------------------------------------------

            Disk:                  disk1

            Status:                Online

            Size (Total):          999026356224 B (999.0 GB)

            Conversion Progress:   Paused

            Revertible:            No

            LV Name:               iMac HD

            Volume Name:           iMac HD

            Content Hint:          Apple_HFS

 

So I'm stuck.

 

I don't want to delete and reinstall.  There has to be an easier way?

 

Thanks in advance for any suggestions.

Posted on Mar 6, 2016 1:50 PM

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Q: filevault decrypt couldn't start decryption "err = -69755"

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  • Helpful answers

  • by trigas,

    trigas trigas Jul 25, 2016 9:24 AM in response to Nuke
    Level 1 (9 points)
    Jul 25, 2016 9:24 AM in response to Nuke

    Try plug in the power. I'm decryption and external drive and it immediately started decrypting. For some reason there's not message or log about it!!!

  • by keg55,

    keg55 keg55 Jul 25, 2016 10:03 AM in response to Nuke
    Level 6 (8,368 points)
    Mac OS X
    Jul 25, 2016 10:03 AM in response to Nuke

    Judging from your output from diskutil cs list, it appears your drive is no longer Revertible (Revertible:  No). I'm thinking regarless what you try, you won't be able to revert it and will have to erase and restore or reinstall.

     

    If it were me, I would clone my drive to an external USB drive then restart into the clone, erase my internal drive then clone back over to it. SuperDuper! and Carbon Copy Cloner are excellent cloning software and I think both have a trial period you can use. You can also clone without these if you have an external drive equal to or greater in size. Just restart into your internal drive's Recovery HD and use Disk Utility / Restore to the external drive. This does a block-copy which includes the Recovery HD. Then afterwards, repeat this same procedure only boot from the external's Recovery HD, launch Disk Utility, erase your internal drive and use Restore to restore from the external to the internal drive.