Data Management and Backups Flashcards

A user enables "Optimize Mac Storage" for iCloud Drive to save space. What is the primary behavior of this feature when local storage becomes limited?

Answer: It keeps full-resolution versions of all files only in iCloud, leaving behind smaller, locally stored placeholder files.

When 'Optimize Mac Storage' is enabled, macOS manages storage by keeping full versions of all files in iCloud. When space is needed on the Mac, it removes the local copies of older or less-frequently accessed files, leaving only a lightweight placeholder or stub. The file can be downloaded on demand by opening it.

While inspecting a Time Machine backup volume, a support professional notices a file package ending in `.inProgress`. What does the presence of this file indicate?

Answer: A Time Machine backup was interrupted or failed before it could complete successfully.

A file package with a name like 'YYYY-MM-DD-HHMMSS.inProgress' inside the Backups.backupdb folder indicates a partial backup. This is created when a backup starts but is either canceled or fails to complete. Ordinarily, Time Machine will attempt to use this partial data on the next backup, but its presence can sometimes indicate a persistent backup issue.

A user wants to exclude a large folder of virtual machine images from their Time Machine backups to save space. They add the folder to the exclusion list in System Settings. What effect does this have on the existing backups of that folder?

Answer: The folder remains in all existing backups but will be omitted from all future backups.

Adding a folder to the Time Machine exclusion list only affects future backups. All versions of the folder that have already been backed up will remain on the backup drive until they are eventually deleted as part of Time Machine's normal process of removing the oldest backups when space is needed.

Which of the following is a primary benefit of using iCloud Drive for data management compared to a local Time Machine backup?

Answer: It provides seamless synchronization and access to files across multiple Apple devices.

iCloud Drive's core function is to synchronize data, making the most current version of your files available across all your devices (Mac, iPhone, iPad). Time Machine, in contrast, is a backup solution focused on creating a local, versioned history of your files for recovery and is not a synchronization service.

A developer needs to create a single, compressed archive of a project folder. It is critical that all macOS-specific metadata, such as extended attributes and resource forks, are preserved within the archive. Which command-line utility is best suited for this task?

Answer: ditto

The `ditto` command with the `-c -k --sequesterRsrc` options is the recommended command-line tool for creating a PKZip-compatible archive that properly preserves macOS resource forks and metadata, similar to how the Finder's 'Compress' function works. While `zip` and `tar` have some capabilities, `ditto` is specifically designed to handle these macOS-specific attributes robustly.

A Time Machine backup to a network share, stored as a `.sparsebundle` file, is reported as corrupt and will not mount. Which command-line utility should be the technician's FIRST choice to attempt a file system consistency check and repair on the disk image?

Answer: hdiutil

The first step in repairing a sparse bundle is to attach it as a device without mounting it. The `hdiutil` command is used for this purpose (e.g., `hdiutil attach -nomount -noverify`). Once attached, a tool like `fsck_hfs` or `diskutil` can be used on the resulting device node, but `hdiutil` is the necessary initial tool for interacting with the disk image itself.