If FSCK command is too difficult to perform for you, another solution is to reformat this corrupted external hard drive.
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However, reformatting will erase all the files on this drive. Thus, you need to keep in mind that this solution can only be exerted when you don't have anything important on this external hard drive or you have backed up your important files previously.
Step 3: Provide a name and a format to format the drive, and then click "Format". The most terrible situation is that you can neither access your important files on this external hard drive nor have any copy of data backup at hand.
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What's worse, when you try to fix disk errors with Disk Utility, only to be told "Error: 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. Actually, you still can get your files back with reliable external hard drive data recovery software, and iBoysoft Mac Data Recovery is such a useful recovery tool. What's more, when the disk is corrupted, formatted, unmountable, unreadable, or even erased, this software can still recover the lost files.
This all-in-one recovery tool can restore files from emptied Trash , hard drives, SD cards, memory cards, USB flash drives, etc. With this data recovery software, you can recover emails , photos, documents, videos, etc. Step 2: Launch this program. Select the external hard drive that needs to be repaired and click "Next". This will bring up a window with an Erase button.
How to Wipe Everything Off a Hard Drive Except the OS
Click Erase and then click Done. With the data erased from your partition, you still need to delete the now-empty partition in order to reallocate its space to the rest of your hard drive. To do so, select your hard drive from the left panel and then click the Partition button at the top of Disk Utility. On the pie graph on the left, click the wedge that represents the partition you just erased.
Click the " - " button and then click Apply.
The reason for this error is the modification of the boot drive, or it is being used by some other process or application. Disk Utility can be run from the external drive. The one and only requirement are that Disk Utility must reside on the drive. Formatting the hard drive or partition scheme will recreate a new HFS file structure on the hard drive, which will be free from cryptic errors. This is the most recommended method to repair the error.
Any OS X boot drive is needed to complete the task. But, the important point to remember is that the installer or the recovery drive must reside in the drive, separate from the primary boot disk with the installed OS on it. The above steps offer a resolution of the problem. The errors could have been unresolvable without a boot drive. Therefore, a bootable thumb drive was a good option. The above error may also be triggered due to first Aid or while formatting a non-boot partition. In this case, a resolution of the problem occurs with the Recovery Partition, which comes with all the newer versions of the Mac OS X.
However, this is not applicable for the modification of the boot disk with the help of partitions or formatting. Then the resolution lies in the previous method. Otherwise, we follow the steps:. This will not work with the disk that is throwing the error is the same as the primary boot partition. The solution lies only in using a separate USB drive for fixing the error.
How to Erase and Format a Hard Drive
Device failure may happen any time without warning. The loyal external hard drive may not show up or mount in Finder. Imagine how will one access the videos, documents like spreadsheets etc. Thankfully, advanced software such as Stellar Data Recovery Professional for Mac can help you recover data from an unmounted external hard drive. Vishal is a data recovery expert Stellar addressing several data loss scenarios on a macOS system. He loves to read autobiographies and his personal favourite is of Steve Jobs.
View More. Hello, My Macintosh HD is attacked by a virus or malware.
I scan with antivirus software and deleted affected files. A large number of files are corrupted. Hi Gilbert, First, restart your mac Sometimes when you turn it back on, everything returns to normal. Secondly, Repair the unmounted Macintosh HD in recovery mode. Third, fixed your Macintosh HD not mounted by the terminal. Fourth, run FSCK command in single-user mode.