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 want to use a new hard drive for time machine. I try to restore the old backup into the new disk using disk utility. It fails with the following error :

source volume is read-write and cannot be unmounted, so it can't be block copied

Why ? What can I do ?

share|improve this question

1 Answer 1

up vote 0 down vote accepted

Problem understood. The disks were actually locked by the failed copy of the backup folder I tried to do between the two disks shortly before.

If it happens to you, just make sure the disks are not locked. In the worse case, reboot.

share|improve this answer
    
Please mark this as the answer if your issue is resolved. Thank you! –  bneely Mar 15 at 18:43

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.