A bad sector is the result of mechanical damage, most commonly caused by a head crash, manufacturing flaw(s), wear-and-tear, physical shock, sudden power outages, or dust intrusion. Bad sectors are a threat to information security in the sense of data remanence. Very often physical damages can interfere with parts of many different files.
Bad sectors may be detected by the operating system or the disk controller. Most file systems contain provisions for sectors to be marked as bad, so that the operating system avoids them in the future. Disk diagnostic utilities, such as CHKDSK (Microsoft Windows), Disk Utility (on macOS), or badblocks (on Linux) can actively look for bad sectors upon user request.
When a sector is found to be bad or unstable by the firmware of a disk controller, the disk controller remaps the logical sector to a different physical sector. Typically, automatic remapping of sectors only happens when a sector is written to. In the normal operation of a hard drive, the detection and remapping of bad sectors should take place in a manner transparent to the rest of the system and in advance before data is lost. There are two types of remapping by disk hardware: P-LIST (mapping during factory production tests) and G-LIST (mapping during consumer usage by disk microcode). Utilities can read the Self-Monitoring, Analysis, and Reporting Technology (SMART) information to tell how many sectors have been reallocated, and how many spare sectors the drive may still have. Because reads and writes from G-list sectors are automatically redirected (remapped) to spare sectors, it slows down drive access even if data in drive is defragmented. Once the G-list is filled up, the storage unit must be replaced.
The Windows program ATATool can be used to create deliberate bad sectors by manipulating the sector Error correction code (ECC) data. This can be used to verify bad sector support in disk utilities and forensic tools. For instance, to make sector 10 bad:
MiniTool OEM program enable partners like hardware / software vendors and relative technical service providers to embed MiniTool software with their own products to add value to their products or services and expand their market.
Bad sector refers to a disk sector on a disk storage unit that is permanently damaged. What can you do if your hard disk has a bad block and how to repair bad sectors on hard drive This post will show you what bad sector is and how to repair bad sector on hard drive.
A bad sector, also called a bad block, is an area of the storage device that is permanently damaged. If the sector is damaged, all data on this bad sector may lose and it will be no longer reliable for storing data and files. When there are more bad sectors than the mount stated that is allowed by the manufacturer, the hard drive will stop working.
As we have mentioned in the above part, bad sectors on hard drive may lead to data loss or some worse problems. Therefore, after you have marked the bad blocks as unusable, you had better back up the files to avoid data loss.
For example, if there are too many bad blocks on hard drive, more and more bad sectors on Windows 10 will be marked as unusable and the available space on the hard drive will become less and less. Thus, the advice is to clone your hard drive to another one.
First of all, we will introduce how to clone a hard drive with MiniTool ShadowMaker. Besides the backup feature, it is also a disk clone tool. Then we will show you how to clone a hard drive step by step with pictures.
At here, since your source hard disk has a bad block, you need to remove the original one and connect the target disk to your computer. In addition, if you want to boot your computer from the target disk, you need to change the BIOS settings.
It can help you to extend partition or migrate OS to SSD without data loss. It can also help you to check disk whether there are bad sectors on hard drive with the Surface Test feature. Thus, with so many powerful features, you can download one from the following button.
As for repairing bad sector on hard drive, there is no direct way. And the check disk command can only mark the bad sectors on hard drive as unusable and the operating system will skip the bad blocks in the future.
And as for data protection, it is recommended to clone your hard drive to another one. However, if you have any better solution to repair bad blocks on hard drive, you can share it on the comment zone.
As the name suggests, bad sectors are inaccessible or unwritable sectors on a hard drive or flash drive. This is usually due to physical damage to the surface of the disk or failure of the flash transistors. In addition to the quality problems of the hard disk or flash disk itself, natural aging and improper use will also cause damage to the hard disk or flash disk. If your hard drive has bad sectors, you may not be able to access the data on it. What's more, data on the hard drive may be lost. Therefore, it is necessary to clear the bad sectors of the hard disk!
It's okay if you don't know how to remove bad sectors, here show you two free methods of how to remove bad sectors from hard disk permanently. Including Windows built-in utility and third-party hard disk bad sector repair software.
CHKDKS command prompt is a free Windows built-in tool, and it can be used to check the integrity of a file system and bad sectors of a disk. And find and fix bad sectors, errors, or any other disk problems. Here are the specific steps of removing bad sectors from the hard disk via CMD:
AOMEI Partition Assistant Standard is a powerful disk manager which provides many powerful functions like Check Partition. And you can use it to easily remove bad sectors from hard disk in Windows 11/10/8/7, Windows XP, as well as Windows Vista. Free download the software and see the step-by-step guide:
How to remove bad sectors from hard disk permanently AOMEI Partition Assistant can be the best choice for you! You can easily remove the bad sectors from hard disk in just a few steps, and it is easier than the command line. Besides Check Partition, it also provides many other powerful functions like format/resize/delete the partition, Rebuild MBR, and so on. You can also use it to solve problems like the Current read-only state yes. If you want to recover the lost volume, you can upgrade to Professional Version.
What is the best way to fix or repair bad sectors on the hard disk in Windows 10/8/7 This page offers you the best solutions to fix bad sectors issue and shows you how to replace a disk with bad sectors.
Occasionally, when one or more bad sectors come upon a hard disk, the disk will go bad. When this happens, the data in those bad sectors may be lost, but the data on the rest of the disk will be unaffected and the disk is still completely usable. In order to help you perform bad sectors repair on hard drive and rescue your data as soon as possible, we suggest you follow through with the tips below before you take action to repair bad sectors.
According to Wikipedia and professional IT sites, the bad sector is defied a permanently managed storage unit on a hard disk. Once the sector gets damaged, all saved information in that section is lost. Usually, the operating system like Windows 10/8/7 will skip the bad sector once it's found and marked.
Hard bad sector is mainly caused by physical damage (in 1,2 causes), such as manufacturing error, physical broken, etc. While the soft bad sector is usually related to software issues (in the 3rd cause) such as improper operations on hard drive, file system error, etc.
Due to the different causes of bad sectors, the ways to repairing bad sectors are also varied. Continue reading, you will find the best solutions to repair bad sectors on your hard drive in Windows 10/8/7.
Although we have explained that bad sectors can be defined as physical and logical bad sectors, you may still don't know how to distinguish them. Here is a simple rule for you to tell the difference: whether you can check bad sectors on your drive.
If you can run a disk checking and get the basic information about bad sectors, it's highly possible that your drive is having soft bad sectors. If not, the situation will become worse and it could be the hard bad sectors.
To know about the amount of the bad sectors clearly, a professional and free disk management tool is recommended - EaseUS Partition Master Free. It can check for bad sectors on a hard disk on Windows 10/8/7 for free with one click.
Besides, it has comprehensive hard drive partitioning options, such as resize/move partitions, create, merge, format, and wipe partitions. You can also use it to convert FAT32 to NTFS without losing data, convert MBR disk to GPT disk, or vice versa.
As you know that when the operating system detects bad sectors, it would mark them as unusable no matter it's logical or physical bad sectors. As a result, data loss and the loss of disk capacity are unavoidable. Then, how to fix and remove bad sectors from the hard disk Read on for in-depth tutorials.
If the disk contains many soft bad sectors, always stuck or slow to load data on the computer, or the drive is failing due to physical bad sectors, it is impossible to repair bad sectors. The wise choice is to back up and save your data at first. But how to copy a hard drive with bad sectors
If your computer can't boot into your operating system, create a bootable USB in advance, and then follow the steps below to copy your data. Remember to connect the new hard drive to the computer as a storage device.
When the cloning process finishes, shut down your computer, insert the newly upgrade hard drive into your computer and replace the old drive. If it's a system drive, set the computer to boot from a new hard drive instead of the old one in BIOS.
If your hard drive is experiencing one or more bad sectors, still accessible, follow our instructions to fix your problem and remove bad sectors permanently from hard disk with bad sectors repair tools. 59ce067264