How To Repair Mac Disk
Need to create a new division, or re-format an external drive? There's no need to chase down paid sectionalisation managers or deejay-management kicking disks: your Mac includes a built-in partition manager and disk management tool known every bit Disk Utility.
Deejay Utility is even accessible from Recovery Mode, and then you tin partitioning your Mac'southward hard drive without having to create and load up any special bootable tools.
Accessing Disk Utility
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To access the Disk Utility in macOS, just press Control+Space to open up Spotlight search, type "Disk Utility" into the search box, and then press Enter. You tin too click the Launchpad icon on your dock, click the Other folder, and so click Disk Utility. Or, open up a Finder window, click Applications in the sidebar, double-click the Utilities folder, and so double-click Deejay Utility.
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To access the Disk Utility on a modern Mac—regardless of whether it even has an operating system installed—reboot or boot up the Mac and agree Command+R as it boots. It'll kicking into Recovery Mode, and you tin click Disk Utility to open it up.
In Recovery Mode, macOS runs a special sort of recovery environment. This allows you to use Deejay Utility to wipe your entire bulldoze—or repartition it.
Partition Drives and Format Partitions
Disk Utility shows internal drives and continued external drives (like USB drives), as well as special epitome files (DMG files) that you can mount and access as drives.
On the left side of the window y'all'll come across all mounted volumes.
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This annoyingly leaves out empty difficult drives, but click Views > Bear witness All Devices in the card bar and you'll run into a tree of drives and their internal partitions. Each "parent" drive is a dissever physical drive, while each trivial bulldoze icon below information technology is a partition on that bulldoze.
To manage your partitions, click a parent drive and select the "Partition" heading. You can adjust the segmentation layout scheme here. You can too resize, delete, create, rename, and reformat partitions.
Note: Many of these operations are destructive, so be sure you take backups beginning.
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If yous want to repartition your arrangement drive, you'll need to do this from inside Recovery Manner, with one exception: APFS volumes. APFS is Apple's new file organisation, the default on solid country drives as of macOS High Sierra, and it's got all sorts of clever tricks upwardly its sleeve. One of them: volumes on the same bulldoze pool storage space, pregnant you lot'll see two dissever drives in Finder, but won't have to manage how much storage space each volume uses. To add a new APFS book, simply select your system drive, and and so click Edit > Add APFS in the menu bar. You'll run across the above prompt.
First Assistance Repairs File Organization Problems
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If a difficult bulldoze is interim up, Disk Utility'due south First Assist part is the first thing you lot should try. This feature checks the file system for errors and attempts to correct them, all without much intervention from you lot.
Simply click the drive you lot want to bank check, then click the "First Aid" button. Exist warned that these checks tin accept a while, and running them on your system drive volition go out you with an unresponsive reckoner until it'south done.
Secure-Erase a Sectionalization or Bulldoze
The Erase button allows you to erase an entire hard disk or sectionalization. You can also choose to only erase its free space.
Yous can apply this feature to securely wipe a hard drive. Click a drive, then click the "Erase" button, then click "Security Options" to select a number of passes to overwrite the bulldoze with. 1 pass should be good enough, but you lot tin can ever exercise a few more than if you feel like information technology. The maximum number is unnecessary.
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Note that this feature will only exist useful on mechanical drives, as y'all shouldn't be able to recover deleted data from a solid land bulldoze. Don't perform a secure erase on a solid-land drive, such as the ones built into mod Mac Books—that will just wear downwards the drive for no advantage. Performing the "fastest" erase of the internal drive from recovery mode will erase everything.
Create and Piece of work With Deejay Images
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Click the File menu in Disk Utility and use the New menu to create bare disk images or disk images containing the contents of a binder — these are .DMG files. You can and then mount that disk image file and write files into it. This is especially useful because you tin can encrypt that DMG file, creating an encrypted container file that can store other files. You tin then upload this encrypted DMG file to cloud storage locations or save information technology on unencrypted removable drives.
The Convert and Resize Prototype buttons will allow you to manage that deejay image from the Disk Utility window.
Re-create Volumes and Restore Deejay Images
The Restore feature allows yous to copy one book to another. You lot tin can utilize it to copy the contents of i partition to another, or to copy a disk paradigm to a division.
You tin can also create a disk image that contains an exact re-create of an entire partition. Select the drive you lot'd like to create an prototype of, and so click File > New Image > Image From [Partition Name].
You tin can later restore this disk prototype file to a sectionalization, erasing that partition and copying the data from the disk image to it.
RAID Setup
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The Disk Utility besides allows you lot to ready RAID on a Mac: just click File > RAID Assistant in the card bar. Combine disks and partitions into one or more RAID sets and choose whether you desire to mirror, stripe, or concatenate your data. This is an advanced feature well-nigh people won't need to use, but information technology'due south in that location if y'all demand it.
Mirroring (RAID 1) means data yous write to the RIAD is stored on each partition or bulldoze for failsafe purposes. If 1 drive dies, your data is still available elsewhere.
Striping (RAID 0) will alternate disk writes betwixt one drive and the other for faster speed. However, if ane of the drives fails, you'll lose all the data — so it's getting more than speed at the expense of less reliability.
Concatenation (JBOD) allows you lot to combine different drives as though they were i, useful in certain circumstances.
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The Disk Utility included with Mac OS X is powerful, and it should handle all the functions you demand information technology to perform. It'due south a bit like the Deejay Direction tool congenital into Windows, just more capable and, thanks to Recovery Mode, easier to access from outside the operating arrangement.
Photograph credit: Joe Besure/Shutterstock.com
How To Repair Mac Disk,
Source: https://www.howtogeek.com/212836/how-to-use-your-macs-disk-utility-to-partition-wipe-repair-restore-and-copy-drives/
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