FileVault taking a full day to encrypt?

Discussion in 'Mac OS X Lion (10.7)' started by crow, Jan 18, 2012.

  1. crow macrumors newbie

    Nov 29, 2003
    I just put a new 1TB drive in my MacBook Pro and after running software update I turned on FileVault. It has been encrypting for two hours and currently states it has 16 hours remaining. This seems really wrong to me. Is it because of the size of my new drive? I am using less than 20 GB of the 1 TB right now. I thought turning FileVault on before I added all my data would help the encryption be quicker...
  2. benthewraith macrumors 68040


    May 27, 2006
    Miami, FL
    I believe Filevault 2 encrypts the entire volume. It would create an encrypted disk image on the entire hard drive and depending on write speed could take a pretty long time.
  3. Krazy Bill macrumors 68030

    Krazy Bill

    Dec 21, 2011
    Just let it finish. Yes, the initial encryption seems like forever but once it's done you won't notice it during normal use.
  4. Mr. Retrofire macrumors 603

    Mr. Retrofire

    Mar 2, 2010

    No, FileVault2 does not create or use disk images. FileVault2 uses a new, low level API, called CoreStorage. CoreStorage can encrypt data on all block devices like HDDs and SSDs.

    1 TB (5.200-5.400 rpm) drives have write speeds > 100 MByte/s. The realistic encryption speed on processors which do not support AES-NI, is probably 30-60 MByte/s (Core 2 Duo). Current SB-based MBPs can encrypt 300-400 MByte/s, IIRC (8x-10x faster). So i think, his Mac does not support AES-NI.

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