4. Data Management: Lesson Sixteen Flashcards
Which 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 OS X 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 haven’t changed.
Which types of files are omitted from Time Machine backups?
Time Machine ignores temporary files, Spotlight indexes, items in Trash, log files, and anything else that can be considered a cache.
Time Machine also ignores files that an app defines as exempt, or files that you define 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 won’t be available if your backup volume filled up and Time Machine had to start deleting older items to make room for newer ones.
What are the four ways you can restore data from a Time Machine backup?
Methods for restoring from a Time Machine backup include:
• Navigating through the backup history via Time Machine
• Restoring a user account via Migration Assistant
• Restoring an entire system via OS X Recovery, and
• Manually restoring items via the Finder
