įragments of files and directories deemed as corrupt as a result of, for example, power outages while writing, file name overlength, and/or invalid characters in file name, are moved into a directory under the partition's root, named found.000, and renamed into generic hexadecimally numbered files and directories starting with file00000000.chk and dir_00000000.chk respectively. The Windows Server version of CHKDSK is RAID-aware and can fully recover data in bad sectors of a disk in a RAID-1 or RAID-5 array if other disks in the set are intact. On Windows NT operating systems, CHKDSK can also check the disk surface for bad sectors and mark them (in MS-DOS 6.x and Windows 9x, this is a task done by Microsoft ScanDisk). MS-DOS / IBM PC DOS ĬHKDSK can be run from DOS prompt, Windows Explorer, Windows Command Prompt, Windows PowerShell or Recovery Console. The CHKDSK command was first implemented in 1980 by Tim Paterson and included in Seattle Computer Products 86-DOS. It is similar to the fsck command in Unix and similar to Microsoft ScanDisk, which co-existed with CHKDSK in Windows 9x and MS-DOS 6.x.Īn early implementation of a 'CheckDisk' was the CHECKDSK that was a part of Digital Equipment Corporation hardware's diagnostics, running on early 1970s TENEX and TOPS-20. It verifies the file system integrity of a volume and attempts to fix logical file system errors. In computing, CHKDSK (short for 'check disk') is a system tool and command in DOS, Digital Research FlexOS, IBM/ Toshiba 4690 OS, IBM OS/2, Microsoft Windows and related operating systems. com /de-de /windows-server /administration /windows-commands /chkdsk

SCP, Microsoft, IBM, DR, Datalight, Novell, Toshiba, PhysTechSoft, ReactOS ContributorsĨ6-DOS, MS-DOS, PC DOS, MSX-DOS, SISNE plus, OS/2, eComStation, ArcaOS, FlexOS, DR-DOS, ROM-DOS, 4690 OS, PTS-DOS, Windows, FreeDOS, ReactOS Chkdsk.exe in action on drive C: in Windows 10

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