scandisk

from The Free On-line Dictionary of Computing (8 July 2008)

SCANDISK

   <operating system, storage> An {MS-DOS} command to check for
   faults on a disk and provide a graphical representation the
   results.  Scandisk was introduced with MS-DOS version 6 to
   replace CHKDSK.

   [What kinds of disk?  What faults?]

   (1997-07-16)