What is Check Disk?
Check Disk is a system tool provided in Windows, OS / 2 and DOS to check the file system integrity of a volume and to fix logical file errors. Similar to the fsck command in UNIX, it also helps scan bad sectors on a physical hard drive and recover data from them.
The autochk.exe file must be present in the computer system so that the 'Check Disk' utility can be used. In most operating systems, administrators have a choice of which switches to run with the Check Disk command. The main functionality of Check Disk is to ensure that the system or management information regarding files, folders, and similar data stored on physical disk is correct. Most operating systems are designed so that this information is correct from start to finish when the computer is started.
However, improper device shutdown, removal of USB devices without safely removing them, and malware or hardware failure can all cause this information to be corrupted. In such cases, Check Disk will introduce to fix and fix the errors. It performs analysis and repairs errors on hard drives that are not in use. For disks that are used, such as the C: drive in most Windows operating systems, Check Disk provides a command prompt asking for permission to schedule the procedure for the next system reboot. If the answer is 'yes', the check disk will be executed at the beginning of the next system run.
One of the many methods that Check Disk uses to find errors is to use a disk bitmap with the hard drive sectors assigned to the files. However, Check Disk is unable to repair damaged data that appears structurally intact. When used with Check Disk, the / r command looks for and recovers readable data in the bad sectors of the hard drive. When the / f command is used with Check Disk, it will fix any errors found.