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Summary :

bad sector repair

How to remove bad sector from hard disk permanently? This question may pop up. This article will answer the questions by introducing the two kinds of bad sectors - namely logical bad sector and physical bad sector.

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Bad Sectors

In computing, bad sector refers to a disk sector on a disk storage unit that is permanently damaged. When our hard drives have bad sectors, these sectors won’t respond to read or write request. In other words, the data cannot be saved on such sectors, and all information stored on them will be lost. What’s worse, rapidly developing bad sectors can certainly suggest oncoming hard drive failure.

Symptoms Indicating Bad Sectors

If you encounter the following symptoms when you use your computer, you should pay attention to whether the hard disk has bad sectors.

  • The sound caused by normal friction of the hard disk suddenly becomes strange.
  • The system cannot be started normally when the virus infection has been excluded, and the message “Sector not found” or “General error in reading drive C” appears.
  • When the disk formatting cannot go smoothly, and finally get an error.
  • Scandisk (a diagnostic utility) automatically runs every time the system is booted.
  • When you use the fdisk command to partition hard disk (you can click here to learn how to partition the hard disk easily and reasonably), but the execution will become randomly to a certain process.

If any of the above errors is present, you need to be extra careful because your hard drive has bad sectors. To diagnose the bad sectors, you can use the third-party software MiniTool Partition Wizard.

logical bad sectors and physical bad sectors
 

Logical Bad Sectors

Logical bad sectors are also called as soft bad sectors. When there are some logical bad sectors on the hard disk, these sectors become inaccessible to disk controller software or operating system.

Improper use or operation of the software can also lead to logical bad sectors. For such sectors, it is possible to mark them or fix them by reformatting the hard drive to repair them.

The following states how to do bad sector repair.

Step 1: Scan Disk to Mark the Bad Sector

You can carry out the following operations to mark the bad sectors. Here I take Windows 10 for example.

Note: Please close all open programs, web browsers, and so on, before performing a disk scan to ensure that disk activity is minimal while the disk is being scanned.

Method 1: using the error checking tool

  • Open a File Explorer window by pressing the Windows icon and the E key on the keyboard.
  • In this File Explorer window, click This PC in the left navigation pane.
  • Right-click on the drive you want to scan in the Devices and Drives section on the right side of the window, and then click the Properties
  • In the Properties window, move to the Tools Under Error checking, click the Check button.
  • In the Error checking, please click Scan drive.

click the Check button

Depending on your system, the scan can take anywhere between 15 minutes and a few hours.

Method 2: Run SFC (System File Checker) to scan the hard disk

SFC is a command line tool that scans for corrupted files and resources on the system.

Follow the listed operations to scan your hard drive with SFC.

  • Type Command Prompt in the Cortana’s search box and open the search result.
  • At the Command Prompt window, please type sfc/scannowand hit the Enter key on the keyboard.
Note: Please do not close the Command Prompt window until the scan reports that it has finished.
Tip: If you receive the message “Windows Resource Protection could not perform the requested operation”, you can boot your computer in safe mode and repeat the operations above.

Since this step can only help you mark the detected bad sectors so that the operating system can’t access these zones, you need to carry out the following operations to fix bad sectors.

Step 2: Data Recovery for Logical Bad Sectors

As mentioned, the data saved on logical bad sectors is lost. For this situation, please don’t worry, as the following content shows you how to use the Data Recovery feature of MiniTool Partition Wizard to restore the lost data from the logical bad sectors.

Note: The feature can help you restore the data from the logically damaged partition, formatted partition, and RAW partition, but it is only available in MiniTool Partition Wizard Pro Ultimate and above editions.

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Here are the steps about recovering lost data with MiniTool Partition Wizard.

1. Launch MiniTool Partition Wizard to get its main interface again.

2. Please click the Data Recovery feature on the top Tool Bar.

click the Data Recovery feature

3. After clicking the feature, you will get a new interface where all the detected partitions are listed. Select the partition from which you want to recover the lost data, and then click the Scan Here I take partition D as an example.

select one partition to recover the lost data

4. Wait for the feature scanning. After completing the scan, please check the files you need, and click the Save.

check the needed files and click the Scan button

5. Finally, please choose a directory to save the checked files.

Note: It is highly recommended to save the selected files on another drive in case the lost data will be overwritten.

After recovering the lost data, please back up the data saved on the hard disk, for you are required to format the hard disk in the following steps to complete bad sector repair.

Step 3: Format the Hard Disk with MiniTool Partition Wizard

In this situation, it is recommended to use MiniTool Partition Wizard to achieve the logical bad sector repair by formatting the hard drive.

Here are the steps for formatting the hard drive.

1. Launch MiniTool Partition Wizard to get its main interface.

2. In the Disk Map, choose the partition you want to format, and then choose the Format Partitionfeature from the left panel. Or right-click the partition and then choose the Format

choose Format Partition or Format to format the selected partition

3. Once you get the Format Partition window, please set partition label, file system and cluster size for the selected partition according to your own situation and then click the OK

make some settings for the selected partition
 

4. After going back to the main interface, please click the Apply button to complete these changes.

click the Apply button on the main interface

Step 4: Run SFC again to check the bad sectors

If you finished all the three steps, but there are still some bad sectors, which means that these sectors are physical bad sectors. If there is no, it means the marked sectors are logical bad sectors. You can try to write some data in the formatted partition.

Physical Bad Sectors

In contrast to logical bad sectors, there are only a few chances that your hard drive will develop physical bad sectors. If there are some physical bad sectors or hard bad sectors in the hard disk, neither OS or disk controller can access them nor any type of read and write operations can be performed.

In general, the physical bad sectors are caused by impact or sudden power failure during the use of the hard disk. As we know, the two main types oft he hard drive are HDD and SSD. The cause of physical bad sectors is a little different for these two types of hard disks.

On a traditional hard drive, there are many possibilities for physical bad sectors. The hard drive may have a manufacturing error and natural ware; the hard drive may have been dropped, causing the hard drive’s head to touch the platter and damage some of sectors. Or some air may have entered the sealed area of the hard drive and the dust may have damaged the drive.

Therefore, when there are some physical bad sectors on your hard drive, it means that it ends its life. In this situation, it is recommended to buy a new hard drive for your computer, recover the data from the hard disk with physical bad sectors, and back up all the data from the hard disk to the new one.

Note: It is not recommended to do low-level formatting to the hard disk with physical bad sectors, because this operation will re-divide tracks and sectors, standard address information, and so on, thereby causing severe were on the hard disk.
This article offers a detailed introduction to the bad sectors, and states the solutions to logical bad sector repair and recover the loss from such sectors.Click to tweet

Attention to Hard Disk Usage

In order to avoid losses due to bad sectors, you should pay attention to the following precautions.

  1. Carry out the hard disk health test every 6 months.
  2. Regularly make a backup for the data saved.
  3. Regularly clean the computer.
  4. Avoid sudden power outrage.

Bottom Line

The two kinds of bad sectors that are logical bad sector and physical bad sector have been introduced in this article.

After reading, you may have some questions about bad sectors or the solutions to the logical bad sector repair mentioned in this article, and you can contact us via [email protected] or leave your message following this article.

Bad Sector Repair FAQ

How can I remove bad sector from my hard disk?
There are two types of pf bad sectors -- logical bad sectors and physical bad sectors. If there are some logical bad sectors on your hard disk, you can run CHKDSK and then format it. If there are some physical bad sectors, there is no feasible fix.
Can CHKDSK fix bad sectors?
Scanning every sector on a disk volume looking for bad sectors, CHKDSK attempts to repair logical/soft bad sectors and marks physical/hard bad sectors so they won’t be used again.
Can a hard drive be repaired?
There are various hard drive issues and they are caused by various reasons. To repair a hard drive, you can refer to Top 4 Hard Drive Repair Solutions to Fix Hard Drive Windows 10.
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