# MacOS – Time Machine drive encryption going for 22 hours. Is it stalled

encryptionmacostime-machine

I set up Time Machine in Mountain Lion by plugging in a newly formatted 500GB USB drive, selecting that from the Time Machine dialog, and checking the box to encrypt my backups. A window appeared that said "Preparing disk [diskname] for encryption." The progress bar quickly filled to about 80% and then stalled there. It's been about 22 hours now with no sign of progress. I know encrypting a drive can take a while, but is this too long? Should I force quit or unplug the drive and start over?

Notes:

• I checked the system log to verify that the computer's been up and working all night; it didn't go to sleep.
• The drive is no longer showing up in the finder or Disk Utility. Is that normal when encryption is in progress?

22 hours is very long indeed. I have encrypted a 1TB drive in less time before.

The encryption is handled by a "live background process". "This process continues seamlessly across reboots. The logical volume remains usable at all times."

from man page > diskutil > encryptVolume

Maybe this daemon hangs or simply halted because the drive is not mounted (which is fine). So you should just re-mount it again.

Alternatively, I would try I restart the daemon by simply restarting the computer. Once the Time Machine backup is mounted again, the daemon will continue encrypting the drive.

### Checking the encryption progress using diskutil

You can check the status of the encryption by using the command:

diskutil cs list


In the nested tree you will see a Logical Volume Family which is currently being encrypted. If you drive is being encrypted, you should see the entry Conversion Status: Converting .

Encryption Status:           Unlocked
Encryption Type:         AES-XTS
Conversion Status:       Converting      //what does it say here?
Conversion Direction:    forward
Has Encrypted Extents:   Yes
Fully Secure:            No
Passphrase Required:     Yes