To cut a long story short, the Startup disk is showing as missing. I tried all the trouble shooting and seem to be unable to identify and fix the problem. I was able to download the OS X on my external hard drive so I can operate the Mac now. But the problem has not been solved. What do I do from here to repair the disk. The VPN that just works. #1 Trusted leader in VPN. Enjoy unrestricted access worldwide. 30-day money-back guarantee. ExpressVPN defeats content restrictions and censorship to deliver unlimited access to video, music, social media, and more, from anywhere in the world. Repair disk free download - Disk Drill, Disk Inventory X, Mac Free Disk Partition Recovery, and many more programs. Functionality beyond Disk Utility is a must to get your Mac up and running. The top five Mac disk repair software presented in this blog can be used to repair your hard disk drive for errors, inaccessibility, or system corruption. This 5 software is either free or can be availed as a trial. So, download the trial version of any repair software.
Are there some disk problems on your Mac? Want to use Disk Utility to fix them but receive an error message 'Disk Utility can't repair this disk'? This post will walk you through how to quick and effectively fix this issue.
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Help! Disk Utility Failed to Repair This Disk
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'My external drive is a Samsung M2 Portable 3 Media, 500GB. I might have accidentally disconnected the hard drive without ejecting it first. Now when I run disk utility and click Repair Disk it says: 'Disk utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.' forums.macrumors
Disk Utility, developed by Apple, is a comprehensive system utility for performing disk and disk volume-related tasks on the Mac operating systems. These tasks include formatting, partitioning, erasing, cloning disks, repairing a damaged disk, etc. When certain disk problems happen, to repair this disk using Disk Utility will be a good choice.
However, sometimes you may receive the error message 'Disk Utility stopped repairing 'Macintosh HD'/disk1s2/External HDD, etc. Disk Utility can't repair this disk'.
Usually, this problem may not only happen on Macintosh HD but also on an external hard drive in Mac Mavericks, Yosemite, EI Capitan, or Sierra.
Actually, the above message won't show up in normal circumstances of disk errors. But if the hard drive is beyond the repair scope of Disk Utility, for example, file system gets corrupted, the issue appears.
Well then, what should you do to fix Macintosh HD, external hard drive or another disk that Disk Utility can't repair? Here are some solutions for you.
Fix Disk Utility Can't Repair This Disk
If Disk Utility can't repair external hard drive or Macintosh HD, you should do as the error message shows: back up as many of your files as possible before fixing the issue for data protection.
Back up Important Files with Time Machine on Mac
Before solving the drive that Disk Utility can't repair, the most important thing is to make a backup of the disk data. Usually, the tool called Time Machine will be a good option.
It is the built-in feature of the Mac and can back up your files with ease to an external storage device so as to restore them in the event of unexpected accidents.
Then, here comes the question: how to make a time machine backup from Disk Utility?
Step 1: Connect an external storage drive to your Mac.
Step 2: Then an alert may appear on your Mac asking if you want to configure it as the backup disk with Time Machine. Just click Use as Backup Disk. Besides, it is recommended to check Encrypt Backup Disk.
Step 3: If you don't receive this alert, please go to System Preferences > Time Machine.
Step 4: Click Select Backup Disk to select the storage device which you wish to back up to, and click Use Disk.
This post from apple website - How to use Time Machine to back up your Mac shows you more information.
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Solution 1: Fix the Hard Drive in Single User Mode
What if Disk Utility stopped repairing Macintosh HD? As is well known, Macintosh HD can be viewed on the Mac desktop and it is similar to the 'My Computer' icon in Windows. Moreover, this drive contains the Mac operating system. To fix the issue, you should use FSCK tool. This is the built-in diagnostic & repair program and it can verify & repair the current startup disk.
Step 1: Restart your Mac, and then press and hold the Command + S keys during the startup to enter Single User Mode which will provide you with a text-mode terminal.
Step 2: Type the command /sbin/fsck -fy.
By default, the target disk in Single User mode is read-only, thus, you need to change that: type /sbin/mount -uw /.
- If everything is fine, the message 'The volume Macintosh HD appears to be OK' will appear.
- If some problems are found, you will see 'File system was modified'. Just run the fsck -fy command again until you see a “The volume Macintosh HD appears to be OK” message.
Step 4: Type reboot to exit Single User Mode.
If FSCK cannot help you to fix Disk Utility stopped repairing Macintosh HD, another thing you can do is to reinstall the Mac operating system. How to reinstall macOS will be helpful.
Solution 2: Reformat Drive When Disk Utility Can't Repair External Drive
If Disk Utility failed to repair your external hard drive or other data disk, the above solution is not suitable. In this case, you can do nothing but to reformat the disk. How can you format the target hard drive?
Step 1: Go to Applications > Utilities to find and launch Disk Utility and you can find all the hard drives.
Step 2: Select the target disk or drive, click Erase feature in the top menu. Note that this operation will destroy all the data stored on it.
Step 3: Enter a name, choose a file system and a partition map. Finally, click the Erase button.
After completing the formatting, Disk Utility can't repair this disk issue on an external hard drive can be solved. And there is another thing you should do, that is to restore the deleted data from the backups.
Restore Your Backed-up Files
Step 1: Select Enter Time Machine from the menu bar. If you don't see this option, please go to System Preferences > Time Machine to check Show Time Machine in menu bar.
Step 2: In Time Machine, open the folder containing the files you want to restore.
Step 3: Use the timeline on the edge of the screen or onscreen up and down arrows to quickly find needed items.
Step 4: Select the needed items and click the Restore button to finish the recovery.
Recover Data from Formatted Hard Drive on Mac
When Disk Utility failed to repair disk, you may forget to back up the important files and directly format the target disk. As a result, formatting will make you lose all the data. In this case, the key thing is to recover lost files from the formatted hard drive.
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Well then, is there any data recovery software that can help you to get files back? Sure! Just keep reading.
As to data recovery for Mac, Stellar Data Recovery, is worthy of being recommended. It is specialized in recovering deleted data like files, photos, videos, audios, emails, and more from your internal hard drive, external hard drive, SD card, USB flash drives, memory sticks and other storage devices on all the Mac devices.
Besides, it can restore data from formatted, damaged, and lost partition, as well as unmounted and encrypted drives. What's more, it supports APFS, HFS+, FAT, and NTFS file systems. And it is compatible with Mac OS X 10.7 and above.
When 'Disk Utility can't repair this disk error' appears if you forget to make a backup of your external hard drive or other data drives and format it, get Stellar Data Recovery Premium Trial on your Mac.
Please don’t waste time; just get files off failing hard drive on Mac immediately since they may disappear at any time.
Now, let’s see how to use Stellar Data Recovery.
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Step 1: After getting this Mac data recovery software, install it on your Mac and then launch it to the main interface where you can decide what to recover. Then, click Next to continue.
Step 2: Select your disk and click Scan to start a scan.
Step 3: Now, this data recovery software starts the scan. Depending on the size and condition of the disk, this may take some time and you should wait patiently.
Step 4: After the scan, the deleted files after fixing 'Disk Utility can't repair disk' error will be found. In the left section, unfold each folder to search for needed files or you can go to Deleted List to look for files.
Step 5: Check the items that need to recover and click Recover. Then, specify a path to save the data.
If you don’t activate Stellar Data Recovery Premium, you will get a prompt to ask you to purchase a license key via MiniTool Store after clicking Save. This is since the trial edition can only scan data but not recover it.
Within simple steps, Stellar Data Recovery for Mac helps you to recover lost files from the formatted drive. If you encounter 'Disk Utility can't repair this disk' error message and format the target drive but forget to back up the crucial files, just get this software to get lost data back.
Get 'Disk Utility can't repair this disk' error message on Macintosh HD or an external hard drive in Mac Mavericks, Yosemite, EI Capitan, or Sierra?
This post offers you the corresponding solution in two cases - Disk Utility stopped repairing Macintosh HD and Disk Utility can't repair external drive. Just do as the above paragraphs show. Besides, if you lost some important files when fixing the issue, try to recover them with MiniTool Mac Data Recovery.
Should you have any suggestions of Disk Utility failed to repair disk issue or any questions during using our software for Mac hard drive recovery, please don't hesitate to tell us by leaving a comment in the following area or sending an email to [email protected].
Disk Utility Can't Repair This Disk FAQ
An important application in your maintenance toolbox is the Disk Utility, which is located in the Utilities folder within your Applications folder. When you first run this program, it looks something like Figure 1, displaying all the physical disks and volumes on your system.
Figure 1: The familiar face of Tiger’s Disk Utility.
The Disk Utility application has its own toolbar that you can toggle on and off. Click the lozenge-shaped button at the upper-right corner of the window to display or hide the toolbar.
Displaying the goods on your disks
The volume tree structure on the left of the Disk Utility window lists both the physical disks and the partitions that you’ve set up. A partition is nothing more than another word for volume, which is the formatted section of a disk that contains data. A single physical hard drive can contain several partitions. The information display at the bottom of the Disk Utility window contains data about both the volumes and the partitions on your hard drive.
To illustrate: Clicking a drive labeled at the top of the tree displays a description of the drive itself, including its total capacity, interface (connection type), and whether the drive is internal or external, as shown in Figure 2.
Figure 2: Display data on a physical drive.
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Clicking the tree entry for a partition, however, displays information about the type of formatting, the total capacity of the partition and how much of that is used, and the number of files and folders stored on the partition (see Figure 3).
Figure 3: Display data on a volume.
Playing doctor with First Aid
From the First Aid pane, Disk Utility can be used to verify (or check) any disk (well, almost any disk) for errors, as well as repair any errors that it finds. Here are the two exceptions when the buttons are disabled:
- The start-up disk: Disk Utility can’t verify or repair the start-up disk — that’s Mac talk for the boot drive that contains the Mac OS X system that you’re using at the moment — which makes sense if you think about it because that drive is currently being used!
- If you have multiple operating systems on multiple disks, you can boot from another Mac OS X installation on another drive to check your current start-up disk. Or, you can boot your system from the original Mac OS X installation CD and run Disk Utility from the Installation menu.
- Your start-up disk is automatically verified and repaired (if necessary) during the boot procedure, so you really don’t need to worry about checking the start-up disk.
- Write-protected disks: Although you can use the Disk Utility to verify CDs, DVDs, and write-protected removable disk drives (like a write-protected Zip disk), it can’t repair them.
- You also can’t repair a disk that has open files that are currently being used. If you’re running an application from a drive or you’ve opened a document that’s stored on that drive, you won’t be able to repair that drive.
You can also elect to verify and repair permissions (also called privileges) on a disk; these are the read/write. If you can’t save or move a file that you should be able to access, check that drive for permissions problems. Unlike fixing disk errors, you can verify and repair permissions on any volume that contains a Mac OS X installation (whether it was used to boot your Mac or not).
In order to verify or repair, you must be logged in as an admin-level user.
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To verify or repair a drive, first select the target volume/partition in the list at the left. To check the contents of the drive and display any errors, click the Verify Disk button. Or, to verify the contents of the drive and fix any problems, click the Repair Disk button. Disk Utility displays any status or error messages in the scrolling list; if you’ve got eagle eyes, you’ll note that the window can be resized so that you can expand it to display more messages. (You can also drag the dot between the left and right panes to expand the list.)
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Check your disks once every two or three days. If your Mac is caught by a power failure or Mac OS X locks up, however, it’s a good idea to immediately check disks after you restart your Mac. (Don’t forget that the start-up volume is automatically checked and repaired, if necessary.)