Hi there,
I have been backing up my mac with Time Machine since Lion.
I now have Mountain Lion and want my time machine backups to be encrypted.
How do I encrypt my existing backups?
If I go to SELECT DISK in Time Machine Preferences the "encrypt backups" tick box is greyed out
Its a 1 TB HDD GUID Partition Table with a MAC OS Extended (Journaled) partition.
You have to activate FileVault (that is, encrypt the boot volume) for that to work.
Already using FileVault 2.
Still greyed out.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Triple-click the line below to select it, then drag or copy the text — do not type it — into the Terminal window and press return:
diskutil list; diskutil cs list
Post any lines of output that appear below what you entered — the text, please, not a screenshot.
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *251.0 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 250.1 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *249.8 GB disk1
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk2
1: EFI 209.7 MB disk2s1
2: Apple_HFS 1TB WD Ext 999.8 GB disk2s2
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 464E8545-3178-43C0-B946-E4752DA51896
=========================================================
Name: Macintosh HD
Size: 250140434432 B (250.1 GB)
Free Space: 16777216 B (16.8 MB)
|
+-< Physical Volume D7110D0B-E12F-4AFB-8E82-C20D92063A85
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 250140434432 B (250.1 GB)
|
+-> Logical Volume Family 895FC3AE-BB62-4824-9C58-EDD93E11E852
----------------------------------------------------------
Encryption Status: Unlocked
Encryption Type: AES-XTS
Conversion Status: Complete
Conversion Direction: -none-
Has Encrypted Extents: Yes
Fully Secure: Yes
Passphrase Required: Yes
|
+-> Logical Volume 609E48D9-F665-4DE7-8E25-76967BC102D5
---------------------------------------------------
Disk: disk1
Status: Online
Size (Total): 249804886016 B (249.8 GB)
Size (Converted): -none-
Revertible: Yes (unlock and decryption required)
LV Name: Macintosh HD
Volume Name: Macintosh HD
Content Hint: Apple_HFS
Please post the output of this command:
ls -lA "/Volumes/WD Ext"
You can convert a drive to a CoreStorage encrypted drive by running the following command in the Terminal (in this case disk2 is your Time Machine drive):
diskutil cs convert disk2 -passphrase PASSWORD
Running that command and entering your password should result in the drive being converted to a CoreStorage volume and encrypted. Afterwards when you mount the drive the system will ask you for the password, which you can store in your keychain to make the mounting and use of it seamless.
You got my curiosity going. I just went into Time Machine preferences, reselected the drive and was able to select the encrypt box. It encrypted the drive (A Get Info shows it as HFS Journaled, Encrypted) and whatever was previously on the drive is still there.
I am on 10.8.2 and a 2011 MacBook Air.
Encrypt existing time machine backup in Mountain Lion?
