The boot record of the drive, the file system, the distribution of data, to the storage sectors themselves – anything can be the source of the problem. There are many processes that come under the ambit of disk repair. Selecting the Disk Repair Software: What to Consider Simply analyzing the hard disk to determine its health and data distribution can be considered a part of disk repair too, as they help you decide how to best approach the problem. Some tools focus just on fixing the MBR, which can help you if your drive just isn’t booting. HDD repair or external HDD repair, therefore, primarily involves fixing bad sectors and recovering data from them. Occasionally this problem affects the Master Boot Record itself, preventing the OS from booting at all. This can show the drive as empty even though it is not. Sometimes the file system table gets corrupted. Normally, the OS should remap the data to a new sector, but it does not always work, leading to data loss. When a hard disk starts malfunctioning, it rarely goes kaput all at once.
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