This manual describes new and changed software features, problems and restrictions to software, and changes to documentation for the DFU V3.5 application.

Software Version: DFU, Version 3.5

Operating System and Version: OpenVMS x86-64, OpenVMS Integrity, OpenVMS Alpha

Buld date: June 3, 2024

Overview

1 Functions

• DEFRAGMENT : defragment individual files or an entire disk
• DELETE : delete files by file-id, and delete directory(trees) fast
• DIRECTORY functions : COMPRESS , DUMP or RECOVER directories : search directories for files with multiple versions, alias files, or empty directories
• INDEXF : analyze, defragment truncate and extend INDEXF.SYS
• REPORT : reports disk fragmentation
• REVERSION : Reversions files back to starting at ;1
• SEARCH : rapidly search for files
• SET : set file attributes
• UNDELETE : recover deleted files
• VERIFY : rapidly analyze (and repair) the disk structure

DFU V3.2 is available at https://www.digiater.nl/dfu.html. Some prior versions may be available on various OpenVMS Freeware CD distributions. Other available versions may exist.

2.1 Supported Environments

• OpenVMS x86-64 V9.2-2 and later
• OpenVMS Integrity V8.2 and later
• OpenVMS Alpha V7.3-2 and later

• Updated kitting and documentation
• Porting to x86 native builds
• Add SEARCH /DENSE
• SEARCH /SORT enhancements
• DIRECTORY command able to look for directories with at least n files
• Permit blank lines and comments in an input file for DEFRAG command
• Add REVERSION command
• Demote DFU-E-INVBAKFID to -W-
• Add /ACTION=COMPRESS to SEARCH ... /CHAR=DIRECTORY
• More 2TB volume support - deal with lengths and blocks as unsigned
• Reduce default IO size to 256 to avoid window turns
• Add DEFRAGEMENT /DISK
• Reduce and cleanup progress output
• Add /ACTION=DELETE to SEARCH
• Do not try to reference ATR$C_ACCDATE or ATR$C_ATTDATE for pre-ODS5 supported builds
• A deleted file header has (!fh2->fh2$w_fid_num && !fh2$b_fid_nmx); detect this. A sequence number of zero is valid and does not mean that there is a problem with the header or that the file is deleted. This change addresses a "false positive" of a deleted header when the sequence number was zero.
• Display % free as a floating point value for REPORT command
• Correct checking of link count for unused headers
• Add /UNITS= to SEARCH
• Promote all float to double
• Before reporting that a file is not in a directory, double-check that it still exists and can not be found via a directory scan
• Before reporting a link count mismatch, check that the file header isn't deleted.
• Detect and display information about free space drift between $getdvi and bitmap space
• Enhance VERIFY/DIRECTORY_SCAN to include [FULL|STRUCTURE_ONLY] with default STRUCTURE_ONLY
• Add /SPECIFICATION_MATCH to SEARCH
• Add extra check for LOSTHDR5 similar to LOSTHDR1 message
• Correct file name returned for largest directory symbol
• Add [NO]RVNFID=x to search for files with/without matching RVN
• Display back BAKFID with DFU-E-INVBAKFID
• Add SET /MODIFICATION_DATE
• Add /DISPLAY_FIRST to SEARCH
• Allow SEARCH /SORT=ALLOCATION|FRAGMENTS for /FRAG
• Use of FIB$V_NOLOCK set and FIB$V_WRITE fails on V92. Attempting to access a file with both FIB$V_ NOLOCK set and FIB$V_WRITE set will result in SYSTEM-F-BADPARAM being returned. Avoid this by removing NOLOCK in those situations.
• Display timestamps in various places
• Add more status checking; correct uninitialized variables, code cleanup
• The REPORT command now creates a number of DCL symbols corresponding to the output from the report command.
• The REPORT command now has a /NOOUT qualifier to suppress output
• Change default behavior to NOSMG. New logical name DFU$SMG. If *defined* SMG is enabled; otherwise SMG is not enabled. If both DFU$NOSMG and DFU$SMG are defined, DFU$NOSMG takes precedence and SMG is not enabled.
• Add /SORT qualifier for SEARCH /FRAGMENT. Sorts the results of DFU to the output file specified in /OUTPUT. By default, file names are sorted. When /SORT is used with /FRAGMENT, output is sorted by file allocation size smallest to largest. /SORT cannot be used with /FULL or /SUMMARY.
• add largest found directory file to report command
• Add /APPEND qualifier to DIRECTORY command.
• Add /UNTIL qualifier for DEFRAG command
• Add /return_limit qualifier to SEARCH
• Fixed bug in SEARCH with deep directories and corrupt returned file specs.
• Fixed bug in VERIFY regarding allocated vs free blocks.
• Fixed incorrect bitmap set/clear issues
• Avoid spit I/O when accessing the index file
• DIRECTORY /COMPRESS and /TRUNCATE updated to zero empty space

• SCI strongly recommends that systems are updated with latest/current OpenVMS patches and updates.
• Patch kit VMS842L1I_F11X-V0200 (or subsequent version/platform specific variants) is required when using DIRECTORY /TRUNCATE command to avoid potential XQPERR bugchecks or directory corruption.
• DFU cannot handle volume sets with more than 32 disks.
• DFU handles files names as case-blind. There is no support for case-sensitive filenames.
• Many DFU commands require READ and/or WRITE access to INDEXF.SYS. It is therefore recommended to run DFU commands with BYPASS privilege enabled.
• INDEXF /DEFRAG, /TRUNCATE and /EXTEND commands can only be performed on offline (dismounted) disks and thus cannot be executed on the system or quorum disk. These commands may require VOLPRO privilege.
• The command DELETE/DIR/TREE requires SYSPRV privilege on a ODS5 disk with hardlinks enabled.
• DFU supports extended (ISO-Latin-1) file naming conventions for ODS5. To work properly, however, the following process setting may need to be performed prior to using DFU: SET PROCESS/PARSE=EXTENDED. Failing to do so may result in errors, such as '%CLI-W-PARMDEL, invalid parameter delimiter'.
• Operations on NFS or DFS volumes is not supported.

Minimum process quotas recommended for DFU use:

• WSQUOTA : 9999
• WSEXTENT : 99999
• DIOLM : 99
• ASTLM : 99
• FILLM : 99
• BYTLM : 99999
• PGFLQUOTA : 999999

• T. Dorland
• W. Saarloos
• J. van der Burg
• N. Lastovica

• DFU035.RELEASE_NOTES
• DFU035_RELEASE_NOTES.HTML
• DFU035_RELEASE_NOTES.PDF
• DFUHLP.HTML
• DFUHLP.PDF
• DFUHLP.TXT

• DFU is freeware. It may be freely downloaded and used.
• DFU is provided "as is" without warranties, either expressed or implied.
• DFU is not a Commercial "Off-The-Shelf" software product.
• DFU remains the intellectual property of Software Concepts International, LLC and the predecessor authors of this software.
• You may not redistribute or supply this version DFU to any third party without prior written consent from Software Concepts International, LLC.
• The source code is not available, and support is limited.
• In case of problems, please report them to DFU@SCIINC.COM and they may get corrected.
• Software Concepts International, LLC. is not responsible for any malfunction or data loss caused by this software or coexistence or interoperability with other software or hardware.