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Let macOS manage space between multiple volumesWith Apple File System (APFS), the file system introduced in macOS 10.13, you can easily add and delete volumes on your storage devices. APFS-formatted volumes automatically grow and shrink—you never have to repartition a storage device again.
Keep your external storage devices secureWhen you get a new flash drive or other storage device, format it as APFS and encrypt it with a password to protect its contents.
Give your disk a checkupIf you're having problems with a disk, Disk Utility can check the disk and repair problems it detects.
To browse the Disk Utility User Guide, click Table of Contents at the top of the page.
Disk Utility within Mac OS X provides a range of disk management tools, from erasing and repartitioning hard disks to restoring images and repairing volumes. It's a simple way of interacting with attached storage on your Mac.
Beyond this graphical front-end are some powerful command-line tools that we can use directly. In this series, we'll look at how to replicate the functionality of Disk Utility at the command-line.
The following guide will require the use of an external hard drive which will be erased and partitioned.
TerminologyA partition is a logical storage unit located on a hard disk. A hard disk can contain a single partition, making use of all the space it contains, or it can be split into multiple partitions.
In order to store data on a partition, it needs a filesystem. Once a partition has been formatted, this combination of partition and filesystem is known as a volume.
Here's a USB hard drive that has been split into 16 partitions, all of which will display separately on the Mac as separate volumes since they've been formatted, though they are all on the same drive.
Imagine you have a loft apartment that's just four outer walls. Think of partitioning as putting up dividing walls to create additional rooms. The more walls you put up, the more rooms you'll have, but all limited to the total amount of space you first had available.
But these rooms can't be used yet, not until you decide what each room will be. Formatting a disk partition is no different than deciding which room will be the bedroom or kitchen. At that point, it becomes a volume.
With the introduction of OS X Lion, your Mac's hard disk is split into two partitions with two corresponding volumes. The first is hidden and named Recovery HD for OS X Recovery, allowing you to reinstall OS X without needing any physical media. The second is the more familiar Macintosh HD. How do you play sims on a macbook air.
Benefits of the Command-LineDisk Utility is more than adequate to perform any form of disk management for most users. It's also safer than the command-line, displaying warning dialogs before proceeding with any potentially destructive functions.
https://hcex.over-blog.com/2020/12/best-mac-for-home-studio.html. For more experienced users, the command-line offers a greater level of flexibility and control so that what would normally require several different interactions and mouse clicks can be done with just one command.
Disk Information withdiskutil 
The diskutil command provides many of the features of Disk Utility, from verifying and repairing volumes to changing partition information.
To view the full list of available options for the command, enter the command diskutil.
Using the list option will display some basic information about all available volumes and drives attached. Within Terminal, enter:
In the following screenshot, you can see both the Recovery HD and Macintosh HD, both partitions contained on the Mac's internal hard disk. An external hard disk is also connected with a volume labeled Untitled.
There are some hidden partitions (such as EFI) used for the purposes of providing drivers and settings during boot. These aren't volumes since they cannot be mounted.
Depending on whether you have features such as FileVault 2 or Fusion Drive, your partition layout might differ slightly to what is pictured above.
For many of the options within diskutil, it's necessary to use the disk or partition's Identifier. Using list will provide you with this information.
Should you have a number of disks and only want to view information about a specific one, you can append the disk identifier to the command:
The first number represents the physical disk identifier. The number following the letter 's' represents the partition number. If a disk has three partitions, it would follow this convention:
- disk2s1
- disk2s2
- disk2s3
The diskutil command provides many of the features of Disk Utility, from verifying and repairing volumes to changing partition information.
To view the full list of available options for the command, enter the command diskutil.
Using the list option will display some basic information about all available volumes and drives attached. Within Terminal, enter:
In the following screenshot, you can see both the Recovery HD and Macintosh HD, both partitions contained on the Mac's internal hard disk. An external hard disk is also connected with a volume labeled Untitled.
There are some hidden partitions (such as EFI) used for the purposes of providing drivers and settings during boot. These aren't volumes since they cannot be mounted.
Depending on whether you have features such as FileVault 2 or Fusion Drive, your partition layout might differ slightly to what is pictured above.
For many of the options within diskutil, it's necessary to use the disk or partition's Identifier. Using list will provide you with this information.
Should you have a number of disks and only want to view information about a specific one, you can append the disk identifier to the command:
The first number represents the physical disk identifier. The number following the letter 's' represents the partition number. If a disk has three partitions, it would follow this convention:
- disk2s1
- disk2s2
- disk2s3
In addition to list, you can also use info with the corresponding identifier to display even further information, like so:
As within Disk Utility, the diskutil command can be used to verify or repair volumes of any errors and is very straightforward to do using either verifyVolume or repairVolume. These options don't need the disk identifier, just the volume's name:
If the feedback within Terminal looks familiar, that's because it's the same information Disk Utility provides.
Disk permissions can also be verified and repaired using two similar commands:
Erasing DisksErasing disks from the command-line can be a dangerous process as there aren't any warnings or confirmations. One typo could lead to irreversible data loss if there's no backup to restore from. If you're not familiar with the command-line, Disk Utility is just as capable.
You can either erase a whole disk which will remove any partitions stored upon it, or individual volumes without affecting others.
To erase an entire disk, you'll need the disk identifier, enter the following, adjusting the disk identifier to suit:
You'll notice this command has a little more going on than previous ones. The structure of the command is:
Erasing a whole disk will clear any partitions and create a new, single partition, before formatting it as a volume.
FilesystemYou can specify the filesystem to format the partition in by using any that are supported. https://good-roulette-strategy-axis-poker.peatix.com. The most common would be JHFS+ which is more commonly known as Mac OS Extended (Journaled).
To find out which filesystems you can use, enter:
Macbook Pro Boot Disk Downloaddiskutil listFilesystems
This simply refers to the name of the volume that will be created. In this instance, I've just labelled the volume as 'Test'. Cloudmagic 7 6 19 download free.
Disk IdentifierOnly the primary part of the identifier (i.e. disk1, disk2, disk3.) is needed. The additional segment indicating the partition number is omitted.
Erasing VolumesErasing volumes doesn't erase or affect the entire disk, only the volume you specify.
Here is an external drive that's partitioned with two volumes, FirstVolume and SecondVolume. To erase SecondVolume, the command is:
The command's structure is almost identical to using eraseDisk, only that you specify the volume rather than disk. Should a disk contain multiple volumes, only the one you specify is altered.
You'll notice that erasing a volume requires specifying the filesystem and name. This can be a bit tedious if you don't actually want to change either of these, but simply want to erase the contents.
Instead, the reformat option will erase the contents of the volume without requiring the filesystem or name, provided these are to remain unchanged.
Now, the volume will be erased but retain the existing filesystem and name.
Renaming VolumesCan i download sims 4 on my macbook. Within the Finder, you can quite easily rename the volume by selecting it on your desktop and pressing the Return key, just like you would any file or folder.
Renaming volumes within the Terminal uses a different method than the renaming of files and folder, something accomplished by using the command:
Wrapping Up Disk Management Macbook Pro RefurbishedWe've only scratched the surface of diskutil yet covered quite a lot. While the graphical interface of Disk Utility can be easier to interact with, a task that would involve several steps can be accomplished with just one single command.
In the next part of this series, we'll cover how to manage partitioning and modify volumes.
You can purchase the complete guide to Disk Management From the Command-Line that includes Building an OS X Triage Drive as an ebook in ePub and PDF format for just $0.99.
