Time Machine encryption 3 steps, last step very slow
Anyone else having this issue? Any solutions?
I enabled encrypted Time Machine backups to a USB drive in Lion 10.7.1 on a latest generation 15 inch MacBook Air.
Time Machine first said it was changing the USB drive to encrypted using Core Services. That took under a minute.
Then it showed the normal time machine progress bar for the initial backup. I have about 225 Gigs and it took a few hours, as expected
Then a new third step. In the Time Machine pull down menu at the very top of the screen, it says Encrypting Backup Disk and gives a % completion. I let it run about 12 hours and it has gradually increased to 22% ... i.e. it is going to take nearly 3 days at this rate!
I don't understand why it is encrypting AFTER the initial time machine backup was finished. I had thought that once Core Services was enabled on the external drive, all the disk writes would automatically be encrypted, so it would not be necessary to do a batch encryption afterwards. And why would the encryption be so incredibly slow?
MacBook Air, Mac OS X (10.7)