@DCHECK
Syntax: Dcheck [<opts>] <devname>
Usage : Check disk file structure
Opts  :
  -w=path = pathlist to directory for work files
  -p = print pathlists for questionable clusters
  -m = save allocation map work files
  -b = suppress listing of unused clusters
  -s = display count of files and directories only
  -o = print options for DCheck