DFU

The ODS-2 Disk and File Utilities is a high performance utility 
developed to perform routine maintenance and special purpose operations
on disks, files and directories. The functionality offered by DFU
is not or partly available through other DCL commands or VMS utilities.
 
NOTE: DFU V2.2 is a freeware software product.

DFU has the following functions:

  o DEFRAGMENT : defragment individual files
  o DELETE     : delete files by file-id, and delete directory(trees) fast
  o DIRECTORY functions 
               : COMPRESS , CREATE or DUMP directories
               : search directories for files with multiple versions , 
                  alias file entries , corrupted or empty directories
  o REPORT     : reports disk fragmentation
  o SEARCH     : search for files
  o SET        : set file attributes
  o UNDELETE   : recover deleted files
  o VERIFY     : analyze (and repair) the disk structure