Wikipedia
CHKDSK (short for "check disk") is a system tool in DOS, FlexOS, 4690 OS, OS/2 and Microsoft Windows. It verifies the file system integrity of a volume and fixes logical file system errors. 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 …
CHKDSK - Wikipedia, the free encyclopedia