Lesson 15: Manage Time Machine Flashcards
What backup destination disks does Time Machine support?
Time Machine can back up to any Mac OS Extended volume or network shares hosted from Time Capsule or macOS Server.
How does Time Machine maintain a backup history of the file system?
Time Machine starts with a full copy of the file system to the backup disk.
Then it maintains a list of changes to the file system, and every hour copies only the changes to the backup disk. In the backup, it creates a simulation of the full file system using hard links for files that have not changed.
What types of files are omitted from Time Machine backups?
Time Machine always ignores temporary files, Spotlight indexes, items in the Trash, log files, and anything else that can be considered a cache.
Time Machine also ignores any files an application has defined as exempt, or any files you have defined as exempt in Time Machine preferences.
Why is Time Machine inefficient at backing up large databases?
Time Machine is inefficient at backing up large databases because it must back up the entire database file every time any change, no matter how small, is made to the database.
Why might a previously backed-up item no longer be available in Time Machine?
A previously backed-up item will not be available if your backup volume filled up and Time Machine had to start deleting older items to make room for newer ones.
What four methods can be used to restore from a Time Machine backup?
Methods for restoring from a Time Machine backup include:
• Navigating through the backup history via the Time Machine application
• Restoring a user account via Migration Assistant
• Restoring an entire system via macOS Recovery, and
• Manually restoring items via the Finder
When restoring from the Time Machine interface, how can you tell which backups are available immediately versus backups that are only available when the backup disk is connected?
In the Time Machine restore interface, bright tick marks in the timeline indicate back-ups that can be restored immediately, whereas light tick marks indicate backups that are only available when the backup disk is connected.
