Procedure completed using Windows 11 24H2
When recently cloning an NTFS formatted drive the program (Acronis) reported a number of unreadable sector errors.
I wanted to know which files were occupying these sectors, and in searching found many suggestions to use an old Microsoft utility called nfi.exe
(NTFS File Sector Information Utility).
This was a program distributed as part of the OEM Support Tools. This is a Windows NT 4 / Windows 2000 era package which of course is no longer available directly from Microsoft's web site.
Web Archive to the rescue:
Download