Disk error checking and chkdsk are similar concepts, but they are different in some ways. Disk error checking is a feature in the Windows operating system that scans the hard drive for errors and corrects them automatically. Chkdsk, on the other hand, is a specific utility program within the Windows operating system which can be used to perform more advanced disk error checking and repair tasks.
Chkdsk can be run on any mounted volume within the operating system, and it can perform checks for various errors like bad sectors, cross-linked files, and lost clusters. Additionally, chkdsk can fix these errors, and it can also recover data from corrupted or unreadable files.
So while disk error checking is a more basic feature of the operating system, chkdsk is a more advanced tool that can be used to perform more specialized tasks when diagnosing and repairing hard drive issues.