Part 3 File Systems: Lesson 10 Flashcards
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, and Apple Partition Map is the default partition scheme on PowerPC-based Mac computers.
What is the difference between disks, partitions, and volumes?
Disks are the actual storage hardware; partitions are logical divisions of a disk used to define the storage space; and volumes, contained inside partitions are used to define how the individual files and folders are saved to the storage.
What two volume formats are supported for an OS 10 system volume?
The two volume formats supported as system volumes for OS 10 are Mac OS Extended (Journaled) and Mac OS Extended (Journaled, Encrypted).
How does file system journaling work?
File system journaling records what file operations are in progress at any given moment. This way, if a power failure or system crash occurs, the system can quickly verify the integrity of the volume by “replaying” the journal after restart.
What are the four erase options available in Disk Utility? What are the differences between them?
The four erase options in Disk Utility are:
Fastest, which simply replaces the volume directory structure.
A second choice, which provides good security by writing zeros on top of all of the previous disk data.
A third choice, which provides even better security by writing three separate passes of information on top of previous disk data.
Most secure, which provides the best security by writing seven separate passes of information on top of the previous disk data.
How does the Secure Empty Trash feature work in the Finder?
Secure Empty Trash performs a seven-pass erase on the contents of the Trash folder.
How can you ensure that previously deleted items are securely erase?
From the Erase tab in Disk Utility, you can choose to securely erase the free space of a disk or volume. This securely erases any previously deleted files on the selected disk or volume.
How can you encrypt a disk without erasing its contents?
From the Finder, you can encrypt a disk without erasing its contents by right-clicking or Control-clicking the disk and then choosing Encrypt from the shortcut menu.
What four methods can be used to eject a volume or disk from the Finder?
The four methods used to eject a volume or disc from the finder are:
Drag the disk icon to the trash in the dock.
Press and hold the Eject key for a few moments to unmount and eject optical media.
Select the volume you want to eject and choose Eject from the file menu
In the Finder sidebar, click the small Eject button next to the volume you want to unmount and eject.
What is the potential side effect of improperly unmounting or ejecting a disk or volume?
Improperly and mounting or ejecting a disk or volume may cause data corruption. The system automatically verifies and repairs an improperly unmounted or ejected volume the next time it becomes available to the Mac.
