2021 – Week 33

The backup transfer was a success. It took 4 days, 21 hours, which is better than the 13 or so days required a couple of years ago. Once it was complete, I was able to put the new drive into its new case, hook it all up, and reconnect the drive to the backup system:

  1. Switch off automatic backups.
  2. Add the drive in the time machine  prefpane
  3. terminal
    1. Inherit the backup:
      sudo tmutil inheritbackup /Volumes/(The Backup Drive)/Backups.backupdb/(The Computer's Name on the Backup Drive)
    2. Associate the Boot Drive:
      sudo tmutil associatedisk -a / /(the path to the the last backup of the boot drive on the backup drive)
    3. Associate each backed-up non-boot volume:
      sudo tmutil associatedisk -a /Volumes/(Non-Boot Disk) /(The path to the most recent backup of the Non-Boot Disk)
  4. Open a terminal window and start recording the TMUtil log output:
    1. log stream --style syslog --predicate 'senderImagePath contains[cd] "TimeMachine"' --info
  5. Run a Time Machine backup manually and watch the terminal log to make sure each part of the backup is being connected correctly. Look for Inheritance Scans and watch the sizes of the backups, to make sure it’s not doing complete fresh backups.