Encrypted Time Machine Backup taking so LONG!!

Discussion in 'MacBook Air' started by wallny, Aug 10, 2011.

  1. wallny macrumors newbie

    Joined:
    Jul 31, 2011
    #1
    Just bought a WD 1TB portable USB HDD. I plugged it in to do the first time Time Machine backup. The backing up process is ok: 20GB data in about 15 mins. But the encryption process is taking forever.

    It seems like a 2-step process: system copies your data to the external disk then encrypts the data.

    It's been 2hours but the encrypting only finished 27%. I guess it'll take at least another 5 hours to finish the whole thing.

    Will it take so long to do incremental backup as well? Every time I finish the backup in a few minutes but have to wait for hours for the encryption?

    Is it normal? What happens if i unplug the disk while encrypting is still going on? Will the encryption resume next time I plug it back in again?

    What's the bottleneck here? I looked at Activity Monitor, CPU's been very low usage. So I guess it's the USB2.0 that limits the encryption speed? Or the hard drive itself?

    Thanks!
     
  2. jsolares macrumors 6502a

    Joined:
    Aug 8, 2011
    Location:
    Land of eternal Spring
    #2
    Remember that it's encrypting the entire drive even the empty space, you should have no problems after it's finished tho.
     
  3. wallny thread starter macrumors newbie

    Joined:
    Jul 31, 2011
    #3
    Thanks!

    Yes I created the partition as "Mac OS Extended (Journaled)", it's "Mac OS Extended (Journaled, Encrypted)" now.
     
  4. JayMysterio macrumors 6502

    JayMysterio

    Joined:
    Apr 24, 2010
    Location:
    Rock Ridge
    #4
    I ran into that myself last night. It took hours ( 5+ ) to finally encrypt, and this after the time machine back up itself. I also didn't take into account that I left time machine on, so every hour it was backing up as well. Turned off time machine, extended the sleep duration, and waited patiently. Now my new drive is encrypted and working fine.
     
  5. misterneums macrumors 6502

    Joined:
    Nov 2, 2009
    #5
    Does time machine ever turns off? I don't have file encryption on, and anytime I have my stupid external plugged in it's going NONSTOP :(
     
  6. JayMysterio macrumors 6502

    JayMysterio

    Joined:
    Apr 24, 2010
    Location:
    Rock Ridge
    #6
    You can turn time machine off completely, so that it backups will only be done manually by you. Just open Time Machine preferences, and hit the switch to turn it off. Otherwise, it will constantly run.
     
  7. steaksauce macrumors newbie

    Joined:
    Apr 28, 2010
    #7
    I'm having the same problem. When the external drive is plugged in it is constantly grinding away even though both the encryption process and backup are complete.
     
  8. ambientdaw macrumors member

    ambientdaw

    Joined:
    Jun 14, 2016
    Location:
    Sonoma County CA
    #8
    My 2014MBP Sierra is 12 hours into Time Machine encryption via FW and is 22% through. So its going to take another 48 hours? There's only 400gb data on the SSD. What is wrong?
     
  9. tdhurst macrumors 68040

    tdhurst

    Joined:
    Dec 27, 2003
    Location:
    Portland, OR
    #9
    That's how long it takes the first time.
     
  10. ambientdaw macrumors member

    ambientdaw

    Joined:
    Jun 14, 2016
    Location:
    Sonoma County CA
    #10
    OK, now it's been 24 hours and is only 26% done. It REALLY slowed down overnight. So 3 more days now? Is there a safe way to cease this?
     
  11. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #11
    If you want, you can stop and just format the drive as encrypted in Disk Utility. Of course all your backup data will be gone, and you will have to start a new Time Machine backup, and that takes time also.

    The encrypted format just takes a few seconds. I find if you have a lot of data, it is faster just to format and start over.
     
  12. ambientdaw macrumors member

    ambientdaw

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    Jun 14, 2016
    Location:
    Sonoma County CA
    #12
    How can you stop it? Other than just yanking out the cord?
     
  13. Weaselboy Moderator

    Weaselboy

    Staff Member

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    Jan 23, 2005
    Location:
    California
    #13
    Open up Disk Util and unmount it. If that won't work, you can just unplug it.

    When you go to reformat, go to the erase tab in DU and select the drive itself at the very top of the left column, and not the partition below.
     
  14. tdhurst macrumors 68040

    tdhurst

    Joined:
    Dec 27, 2003
    Location:
    Portland, OR
    #14
    Tell it to cancel, unmount disk, and if that doesn't work, pull out the cord.

    The only thing you'll ruin in the backup data, which you'll have to rebuild anyway.

    I'm assuming there's nothing on the HD besides the Time Machine backup.
     

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