Physical bad sectors may occur due to head crash, wear-and-tear, physical shock, or dust intrusion. Then, you can fix them by reformatting the drive. In case of power loss, bit rot (more likely on floppy disks), or firmware issues, logical bad sectors may occur. Once it becomes damaged, it is inaccessible and all information stored on that sector is lost.īad sectors can be “soft” (logical) or “hard” (hardware, physical), depending on what is making the sector inaccessible. What Is a Bad Sector?Ī sector is the smallest unit for reading and writing data on a disk, but it can be damaged for various reasons. Note that in modern disks, every sector has the same size. The part where the geometric sector and the track overlap is the disk sector. The platter is divided into multiple geometric sectors of the same specifications, starting from its center. The platter is divided into concentric circles, which are the tracks. As we all know, in an HDD, data is stored on platters. In the computer field, the term – sector – originates from the physical structure of HDDs. What to Do If Too Many Bad Sectors Are Detected?.Whatever, hard drive backup is very important. How many bad sectors are too many? What to do if too many bad sectors are detected? This post from MiniTool will show you all.
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