Disk encryption

Discussion in 'OS X Yosemite (10.10)' started by Thrash911, Mar 1, 2015.

  1. Thrash911 macrumors 6502

    Thrash911

    Joined:
    Sep 14, 2006
    Location:
    Randers, DK
    #1
    Hi there,

    I recently enabled FileVault encryption on my system disk. Took about 6 hours. It's working great.

    Then I thought I should encrypt my Time Machine disk as well, so I enabled encryption on it. It seemed it would take a long time, naturally. So then I made a (bad?) decision.. To save time, I thought I would repartition my TM drive, enable encryption on the fresh disk and then start TM from scratch. So I started doing that. But the encryption on the new empty drive seemed to also take a long time. I expected that to be instantaneous, since it was an empty drive, with no data to encrypt.

    Is that not how it works? Will drive encryption take a long time, even on an empty drive? My only thought is, that maybe it erases the whole drive, to get rid of potential data, which would make sense. Is that it?

    Thanks. :)
     
  2. bobr1952 macrumors 68020

    bobr1952

    Joined:
    Jan 21, 2008
    Location:
    Melbourne, FL
    #2
    I think the problem with your thinking is that it really doesn't encrypt the data, it encrypts the drive--so it takes the same amount of time regardless of how much data is stored on it.
     
  3. Thrash911 thread starter macrumors 6502

    Thrash911

    Joined:
    Sep 14, 2006
    Location:
    Randers, DK
    #3
    Great, I know that now. Thanks. Could've kept my backups.. Oh well.. :rolleyes:
     
  4. dyt1983, Mar 1, 2015
    Last edited: Jun 2, 2015

    dyt1983 macrumors 65816

    Joined:
    May 6, 2014
    Location:
    USA USA USA
    #4
    edit: To remove personally identifying information not relevant to the thread.
     

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