: DFU, SYSTEM MANAGEMENT, High Performace disk/file utility. ! : DFU Disk and File Utilities is a high performance utility 5 developed to perform routine maintenance and special  8 purpose operations on disks, files and directories. The 6 functionality offered by DFU is not or only partially 6 available through other DCL commands or VMS utilities.    Available functions : 1  - DEFRAGMENT a single or a small number of files 8  - DELETE files by file-id; delete directory(trees) fast5  - DIRECTORY functions : COMPRESS or DUMP directories ;                        : search directories for files with  9                           multiple versions , alias file  4                           entries , empty or problem%                           directories 1                        : create directories with  +                           preallocated size ;  - quick disk REPORTING for file, freespace and disk usage       statistics  +  - quick diskwide SEARCH for specific files $  - SET : change many file attributes  - UNDELETE files 1  - quick VERIFY and REBUILD of the disk structure 
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