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Re: Encrypt existing Time Machine backups?

From Jolly Roger <jollyroger@pobox.com>
Newsgroups comp.sys.mac.apps, comp.sys.mac.hardware.storage, comp.sys.mac.system
Subject Re: Encrypt existing Time Machine backups?
Date 2015-10-12 21:32 +0000
Organization People for the Ethical Treatment of Pirates
Message-ID <d82n6uF6lacU1@mid.individual.net> (permalink)
References (8 earlier) <zZSdnYL6eciIdYfLnZ2dnUU7-XWdnZ2d@earthlink.com> <mvesrs$7l4$1@dont-email.me> <6Kmdne4aRMfDM4bLnZ2dnUU7-d-dnZ2d@giganews.com> <RcKdnd_Z4twJJobLnZ2dnUU7-VGdnZ2d@giganews.com> <mvh4a3$i0g$1@dont-email.me>

Cross-posted to 3 groups.

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On 2015-10-12, John Somerset <somerset@nospam.com> wrote:
> On 10/12/15 9:54 AM, Alan Browne wrote:
>> On 2015-10-12 08:58, Alan Browne wrote:
>>> On 2015-10-11 19:56, John Somerset wrote:
>
>>>> Oh, I thought that encrypting a disk, as with Filevault, meant the whole
>>>> disk had to be unencrypted to work. If memory can grab only what it
>>>> needs, that sounds much faster.
>>
>> Doh.  I really misread what you wrote when I replied with the stuff below.
>>
>> But yes, the drive remains encrypted and the data from the FileVaulted
>> drive is decrypted in memory on your Mac as needed, file by file (or
>> probably block by block)
>>
> Am I correct that if I encrypted a folder, I couldn't get at any file 
> without decrypting the whole folder?

It's my understanding that with FileVault 2 full disk encryption, it is
not folders and files, but individual *blocks* of the volume. FileVault
encrypted disks are CoreStorage logical volume groups that work with the
LVM built into OS X. Encryption and decryption work at the logical
volume level rather than the file system level.

> Correct or not, that was my concept of it.  That's why I assumed 
> Filevault needed to decrypt a disk to get access to any of it.  It 
> sounded time-consuming, with disaster always lurking.

FileVault 2 in particular is extremely simple, reliable, and safe, and
is used by millions of Apple customers daily. 

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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Thread

Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 12:37 -0500
  Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 17:45 +0000
    Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 13:57 -0400
      Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:05 -0500
      Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:07 +0000
        Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 13:11 -0500
          Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-11 18:17 +0000
            Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 14:07 -0500
              Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-11 15:16 -0600
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-11 17:37 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:48 -0500
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-11 18:53 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:58 -0500
                Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                Re: Encrypt existing Time Machine backups? nmassello@yahoo.com (Neill Massello) - 2015-10-12 00:38 -0600
                Re: Encrypt existing Time Machine backups? nospam <nospam@nospam.invalid> - 2015-10-12 12:01 -0400
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-11 17:52 -0500
                Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-11 19:56 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 08:58 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 09:54 -0400
                Re: Encrypt existing Time Machine backups? John Somerset <somerset@nospam.com> - 2015-10-12 16:15 -0400
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 21:32 +0000
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:39 -0400
                Re: Encrypt existing Time Machine backups? Alan Browne <alan.browne@freelunchvideotron.ca> - 2015-10-12 17:38 -0400
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 22:27 +0000
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-12 02:31 +0000
                Re: Encrypt existing Time Machine backups? ANTant@zimage.com (Ant) - 2015-10-13 01:58 -0500
                Re: Encrypt existing Time Machine backups? Jolly Roger <jollyroger@pobox.com> - 2015-10-13 07:09 +0000
                Re: Encrypt existing Time Machine backups? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-10-12 03:04 +0000

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