Take the 2-minute tour ×
Ask Different is a question and answer site for power users of Apple hardware and software. It's 100% free, no registration required.

I encrypted my Time Machine backup (A Western Digital 2tb external drive) then realised that Airport wont mount the backup over wifi, so am currently decrypting the drive (via Disk Utility).

I found the command:

diskutil cs list

which shows me the progress of the operation (it took a while to register at the under the the menu-bar icon).

Here's a snippet from the output:

    Sequence:               13
    Encryption Status:      Unlocked
    Encryption Type:        None
    Encryption Context:     Present
    Conversion Status:      Converting
    Has Encrypted Extents:  Yes
    Conversion Direction:   backward

Encrypting the backup took about 24 hours, and the time machine icon currently shows 'Decryptig Backup Disk (28%)'.

My question is: can I eject the drive without losing the backup? Will the decryption continue when I mount the drive again?

TIA, Tim

share|improve this question

2 Answers 2

up vote 0 down vote accepted

I had to leave, so took a punt and ejected my drive. Timemachine took up where it left off when I remounted the drive, no problems!

share|improve this answer
    
I should add a warning to this answer: I had additional backups, and your mileage may vary - exercise extreme caution! At a guess, this answer was probably relevant to OSX10.7 - no telling what might change with time! –  memeLab Mar 7 at 5:54

I would say no - I ejected a decrypting drive (it was decrypting due to me not ticking "encrypt" when adding it back to the computer and it then starting to decrypt) and on reconnection it a/ does not appear and b/ in Time Machines Preferences reports 0 bytes.

In disk utility the drive is detected, the logical volume is greyed out and will not mount.

share|improve this answer
    
It does sound risky, hence my original question! Curious to know: if you run diskutil cs list - is there any output? maybe the disk is still decrypting for you? –  memeLab Mar 7 at 5:56

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.