Lesson 9 - Manage File Systems and Storage Flashcards
How are disks, partitions, and volumes different from one another?
Disks are the storage hardware. Partitions are logical disk divisions that are used to define storage space. Volumes, contained inside partitions, are used to define how individual files and folders are saved to storage.
What are the two primary partition schemes for Mac formatted disks? What are their differences?
GUID Partition Table is the default partition scheme on Intel-based Mac computers. Apple Partition Map is the default partition scheme on PowerPC based Mac computers.
What two-volume formats are supported for a macOS Sierra system volume?
The volume formats supported as system volumes for macOS Sierra are Mac OS Extended (Journaled) and Mac OS Extended (Journaled, Encrypted).
How does file system journaling work?
File system journaling records which file operations are in progress at any given moment. This way, if a power failure or system crash occurs and the system restarts, it can quickly verify the integrity of the volume by “replaying” the journal.
What is Core Storage, and what two major macOS Sierra features are implemented through Core Storage?
Core Storage is a file system management layer that’s used by macOS Sierra to provide disk encryption as used by FileVault, and to combine separate disks as used by Fusion Drive.
What are the five ways you can eject a volume or disk from the Finder?
These are the five methods used to eject a volume or disk in the Finder:
• Drag the disk icon to the Trash in the Dock.
• In the Finder sidebar, click the small Eject button next to the volume you want to eject.
• Select the volume you want to eject and then choose File > Eject.
• Select the volume you want to eject and then use the Command-E keyboard shortcut.
• Select the volume you want to eject and Control-click to reveal a pop-up menu. Select Eject.
What is the potential side effect of improperly unmounting or ejecting a disk or volume?
Improperly unmounting or ejecting a drive or volume may cause data corruption. macOS Sierra automatically verifies and repairs an improperly unmounted or ejected volume the next time it becomes available to the Mac.
Which two built-in macOS Sierra apps can you use to gather information about storage devices?
Disk Utility and System Information can both be used to gather information about storage devices.
What are the four erase options available in Disk Utility? How are they different?
These are the four erase options in Disk Utility:
• Don’t Erase Data—Fastest and replaces the volume’s directory structure
• Pass Erase—Writes a pass of random data followed by a pass of zeros on the disk
• Pass Erase—Writes two separate passes of random data followed by a third pass of zeros on the disk
• 7-Pass Erase—Most secure; writes seven separate passes of random and patterned data on the disk
How can you encrypt a disk without losing its contents?
From the Finder, you can encrypt a disk without losing its contents by right-clicking the disk and then choosing Encrypt from the shortcut menu.
What does the Disk Utility First Aid feature do?
Use the Disk Utility First Aid feature to verify and repair the partition scheme and directory structure of a volume. These elements contain the information used to locate files and folders on the volume.
What is target disk mode and how is it engaged?
Target disk mode shares a Mac computer’s internal disks through FireWire ports. You can engage Target disk mode from Startup Disk preferences or by holding down the T key as you turn on the Mac.
