Some white text will scroll by quickly. The -y flag can be a little dangerous, so use it carefully.
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- Running fsck from Single User Mode.
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You can find out for sure with the diskutil command we ran earlier. That command runs the HFS version of fsck on the target drive. You can use two programs to save your disk: DiskWarrior and Data Rescue. Data Rescue is geared towards recovering files from damaged hard drives, while DiskWarrior can also get corrupted drives running again.
- Use “First Aid” in the Disk Utility.
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- Finding the Right Disk!
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- 1. Try Safe Mode!
See Verify a disk. Print this page so you can refer to it later. After your Mac restarts some Mac computers play a startup sound , press and hold the Command and R keys until the Apple logo appears, then release the keys. Click the First Aid button.
If Disk Utility tells you the disk is about to fail, back up your data and replace the disk. If you decide to use "Single User Mode" or Disk Utility, you have the option to run the checking routine multiple times until you can confirm all errors have been corrected.follow
Repair Hard Disks with fsck on macOS - Apple Gazette
If you use Safe Mode, then the check and repair will only run once before the system boots. For those who might be a bit confused by the need for multiple fsck variants, the main "fsck" command contains support for a number of common Linux and Unix filesystems. However, for support of additional file systems, instead of heavily modifying the fsck program, many operating systems include separate fsck-like tools that are specific for the file systems being used.
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How to Repair a Mac Disk with fsck from Single User Mode
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