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This wikiHow teaches you how to fix bad sectors that cause your hard drive to fail or fail. You can proceed on both Windows and Mac computers. Note that physically damaged hard drives cannot be repaired by software and must be taken to a professional data recovery center.
Steps
On Windows
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Connect the drive to the computer if necessary. If you’re trying to fix a malfunctioning external hard drive or flash drive, plug the device into the computer via the USB port.
- Skip this step if you are repairing the built-in hard drive.
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Open Start
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. Click the Windows icon in the lower left corner of the screen. You can also press the ⊞ Win key to open Start .
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Open File Explorer
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. Click the folder icon on the left side of the Start window. The File Explorer window will open.
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Click This PC . This folder is on the left side of the File Explorer window. The This PC window will open.
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Select the hard drive. Under the “Devices and drives” heading, click the hard drive that you want to repair.
- Normally, the hard drive in the machine will be labeled as OS (C:) .
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Click the Computer tab in the upper-left corner of the window. The toolbar will appear.
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Click Properties . This red checkmark is on the left side of the toolbar. The Properties window will open.
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Click the Tops tab at the top of the window.
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Click Check . This option is to the left of the “Error checking” section near the top of the Properties window. [1] X Research Source
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Click Scan drive when prompted. The computer will start scanning for damaged space.
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Wait for the scan to complete. After the scan is complete, the results dialog box will appear.
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Click the Scan and repair drive option that appears in the pop-up dialog box. Windows will begin to repair the hard drive, which means that during the reformatting of the bad sector, all files on the damaged space will be transferred to the new uncorrupted sector.
- You may need to click Scan and repair drive several times to fix all the errors.
On Mac
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Connect the drive to the computer if necessary. If you’re trying to fix a malfunctioning external hard drive or flash drive, plug the device into the computer via the USB port.
- Skip this step if you are repairing the internal hard drive.
- You’ll need a USB 3 to USB-C adapter if your Mac doesn’t have a traditional USB port.
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Click Go . This menu item is at the top of your Mac’s screen. A drop-down menu will appear.
- If you don’t see a Go menu at the top of your screen, click the Finder app icon in your Mac’s dock (or click the desktop) to force the Go menu to appear.
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Click Utilities . This option is near the bottom of the drop-down menu.
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Open Disk Utility. Double-click the gray hard drive-shaped Disk Utility application icon with the stethoscope above it.
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Select the hard drive. In the upper-left corner of the window, click the hard drive you want to repair.
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Click the First Aid tab. The option is shaped like a stethoscope and is at the top of the Disk Utility window.
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Click Run when it appears. Disk Utility will start scanning (and repairing) the damaged space on the selected drive.
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Wait for the repair process to complete. After Disk Utility has finished repairing the drive, a dialog box explaining the repair content will appear.
- If you don’t see any repair content listed, your hard drive has no bad sectors.
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Launch Disk Utility again. Every time a repair (or list) appears, launch Disk Utility again to check for other problems. When Disk Utility no longer reports any repair content after scanning, the Mac hard drive has been repaired. [2] X Research Source
Advice
- Most hard drives have built-in spare sectors, which means that once a faulty space is detected, it will automatically be redirected to unused spare sectors.
Warning
- Physically damaged hard drives should be taken to a data recovery center as soon as possible. If your hard drive is physically damaged, stop using it immediately by turning off and unplugging the drive from your computer (also removing the battery in your laptop).
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This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 3,709 times.
This wikiHow teaches you how to fix bad sectors that cause your hard drive to fail or fail. You can proceed on both Windows and Mac computers. Note that physically damaged hard drives cannot be repaired by software and must be taken to a professional data recovery center.
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