3 Replies Latest reply: Sep 15, 2010 8:36 AM by Pondini
comjpf Level 1 Level 1 (0 points)
I use File Vault to protect my data and Time Machine to back it up to a dedicated external disk.
If my backup disk gets robbed, all my data is readily available to anyone connecting it to another Mac.
The Time Machine help states that I can close my session, thus encrypting my disk, then log in as a guest to back up my encrypted disk. My password will be necessary to restore that backup, but what about the previous hourly,daily and monthly backups? Are they accessible?

MacBook Pro, Mac OS X (10.5.8), G4 500 Powerbook
  • Pondini Level 8 Level 8 (38,720 points)
    comjpf wrote:
    I use File Vault to protect my data and Time Machine to back it up to a dedicated external disk.
    If my backup disk gets robbed, all my data is readily available to anyone connecting it to another Mac.


    No it isn't. The data in your encrypted home folder is what's backed-up.

    The Time Machine help states that I can close my session, thus encrypting my disk, then log in as a guest to back up my encrypted disk.


    I don't know where you're reading that. You may be misinterpreting the instructions. When you first turn File Vault on, you will be logged-off so it can encrypt your home folder. Thereafter, when you log out, Time Machine will back up your (encrypted) home folder. The normal hourly backups will still run, backing-up changes elsewhere, but not in your home folder (a major disadvantage, many think).

    See #25 in Time Machine - Frequently Asked Questions (or use the link in *User Tips* at the top of the +Time Machine+ forum), for details.

    Message was edited by: Pondini
  • comjpf Level 1 Level 1 (0 points)
    Thank you very much. You are right and FAQ no 25 states it very clearly. I'll have to find another way to protect my backed-up data on the external disk.
  • Pondini Level 8 Level 8 (38,720 points)
    comjpf wrote:
    Thank you very much. You are right and FAQ no 25 states it very clearly. I'll have to find another way to protect my backed-up data on the external disk.


    Huh? The backup copy of the sparse bundle is encrypted, just like the one on your Mac. Without the password, it's not accessible.