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Partition/Data Recover

Check Bad Sector

How to check bad sector? This article is aiming at helping you solve some computer problems and improve the performance of your computer by making sure that your hard disk has no errors.

AOMEI Post By AOMEI Updated June 27, 2024

Overview of Check Bad Sector

A bad sector is a sector on a computer’s hard drive that has been damaged and has lost the ability to write and retrieve data. Bad sectors can sometimes corrupt your saved data as well as slow down your computer. In order to improve the performance of your computer, you can use the Check Bad Sector function to make sure that you hard disk has no errors.

AOMEI Partition Assistant also provides the feature to check bad sector for your disk or partition. However, this function can only find the bad sector not repair it. There are dozens of ways to fix bad sector, the most effective one is to subdivide the bad sector into an independent unallocated space or use other repair tools.

Prerequisites for Check Bad Sector

  • Download and install AOMEI Partition Assistant on a Windows computer.
  • Attach the drive on which you would like to check bad sector.

How to Check Bad Sector Step by Step with Partition Assistant

To check bad sector of a Partition

Step 1. Choose a partition that you want to check, right-click it and choose "Advanced"> "Check Partition".

Check Partition

2. Select the way of checking errors to perform. As you can see from the following screenshot, there are three choices, simply choose the last one "Check whether there is bad sector on the partition" . And click "OK" to go to next step.

Check Partition Check

3. Click the "Start" button to check. It will display bad sector counts on the drive and the remaining time. You can also click the "Quick Check" to check bad sectors in a faster way.

Start Check


4. After the check process has been finished, you will find normal and damaged sectors are displayed.

To check bad sector of a Disk

The process of check partition and check disk are roughly the same. That is to say, checking bad sector for disk shares the same steps with check bad sector for partition. The only difference is appeared in the first step. 
When you are going to check bad sector of a disk, the first step is to click on the disk which you want to check, and then choose "Test"> "Disk Surface Test". The remaining steps of this operating are all the same with check bad sector of a partition.

Data Disk Surface Test



Following the above steps, we can check and find bad sectors on a partition or a drive. It helps us to inspect the drive condition.

This feature is usually used to search and find bad sectors if your drive gets some issues, such as, the drive is with slow read/write speed,  errors occur frequently when writing and reading files, or a disk has problems with missing files and folders not opening, and so on.

Notes: Depending upon the size of your disk, the checking process may take you few minutes to work out.


Q: How long will it tale to finish the check process?

A: The time to finish the check process depends on drive size and bad sectors on the drive. It might be stuck if there are too many bad sectors. To check in a faster way, you can click "Quick Check".

Q: Could the feature "Check Partition" be used to fix bad sectors if bad sectors are found?

A: This feature is used to check and find bad sectors on a partition or drive. It is unable to repair or fix bad sectors directly. You can use other repair tools to repair bad sectors.

Q: After I use the "Check Partition" function to repair the partition, the program still prompts that there are errors in the partition, how can I solve it?

A: It is recommended to use the chkdsk command that comes with Windows to repair the partition.