V'0):DFU V2.7 !

DFU V2.7

3DFU Disk / File Utilities for OpenVMS VAX and Alpha

&Revision Information:This manual supersedes V2.6

Date: January 2000

"Operating System:OpenVMS V6.2 thru 7.2

Note:Part of the Freeware Software


(OpenVMS Freeware for VAX and AXP Systems

GThe OpenVMS Freeware CD-ROM contains free software tools and utilities Eto aid software developers in creating applications and managing and using OpenVMS systems.

EMany of these tools are popular packages already widely known and in Fuse, while others are internally developed Compaq tools our engineers Hare making available to our OpenVMS customers. For example, the OpenVMS HFreeware CD-ROM includes Bliss-32 for OpenVMS VAX, Bliss-32 for OpenVMS "AXP, and Bliss-64 for OpenVMS AXP.

-Disclaimer on Testing, Quality, and Licensing

HThe OpenVMS Freeware for VAX and AXP Systems CD-ROM is provided "AS IS" Fwithout warranty. Compaq imposes no restrictions on its distribution, Enor on the redistribution of anything on it. Be aware, however, that Gsome of the packages on the CD-ROM may carry restrictions on their use Fimposed by the original authors. Therefore, you should carefully read ,the documentation accompanying the products.

FCOMPAQ COMPUTER Corporation is providing this software free of charge Fand without warranty. Included in the [FREEWARE] directory on this CD Eare the GNU software licenses. Unless otherwise stated in sources or Fsource packages, the GNU licenses cover all software supplied on this CD.

ACompaq makes no claims about the quality of this software. It is +provided to the customer as a free service.

Copyright ©2000






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Contents






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Chapter 1
Introduction



BThe Disk / File utilities is a tool developed to help finding and Csolving disk , directory and file problems. The usage of low-level CVMS-I/O features have resulted in a powerfull and high-performance Gutility. Also, DFU provides many features which are not available with normal DCL commands.

BDFU supports all types of disk sets which comply to the VMS ODS-2 Fstandard such as volume sets, stripe sets, shadow sets and RAID sets, ;and combinations of these. Spiralog disks are NOT supported

FDFU also supports the new Extended File Specifications (also known as 3ODS-5) which is introduced in VMS 7.2 (Alpha-only).

!DFU is fully Year-2000 compliant.5

1.1 Support on DFU



:Although there is no official support on DFU you may mail <questions/remarks/bug reports to the author via internet at:

 ton.dorland@compaq.com.

:

1.2 General description

>DFU provides the following functions (in alphabetical order) :