Resetting the volinfo.database
From time to time, my SuperDuper backups fail with the error “Could not enable permissions for volume __ : please restart your Macintosh”. Unfortunately, restarting doesn’t usually help. The fix is to delete the volume information database:
sudo rm /var/db/volinfo.database
The next time SuperDuper tries to enable ownership on the volume, the setting will stick, and SuperDuper will be able to complete the backup.
Update (2017-09-19): I think this fix is built into SuperDuper 2.9.2.
