Part 4 Data Management: Lesson 18 Flashcards
How does Time Machine maintain a back up history of the file system?
Time machine starts with a full copy of the file system to the backup disk. The 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 haven’t changed.
What back at destination disks does Time Machine support?
Time Machine can back up to any Mac OS Extended volume or network shares posted from Time Capsule or OS X Server.
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 the 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 won’t be available if your backup volume filled up and Time Machine had to start deleting older items to make room for new items.
What for 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 OS X recovery
Manually restoring items via the Finder
