老古董的东西,在你一不小心的时候就可能遇到,测试了dul成功挖ORACLE 8.0数据库
创建模拟环境

SVRMGR> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
CORE Version 4.0.5.0.0 - Production
TNS for 32-bit Windows: Version 8.0.5.0.0 - Production
NLSRTL Version 3.3.2.0.0 - Production
5 rows selected.
SVRMGR> create table t_xifenfei
     2> as
     3> select * from dba_tables;
Statement processed.
SVRMGR> select count(*) from t_xifenfei;
COUNT(*)
----------
       183
1 row selected.
SVRMGR> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

dul参数配置

    osd_big_endian_flag=false
    osd_dba_file_bits=10
    osd_c_struct_alignment=32
    osd_file_leader_size=1
    dc_columns=2000000
    dc_tables=10000
    dc_objects=1000000
    dc_users=400
    dc_segments=100000
    control_file = control.txt
    db_block_size=2048
    export_mode=true
    compatible=8
    file = dump

dul挖数据

C:\dul>dul8.exe dictv8.ddl
Data UnLoader 8.0.6.8 - Internal Use Only - on Thu Jul 26 20:08:33 2012
with 64-bit io functions
Copyright (c) 1994/2000 Bernard van Duijnen All rights reserved.
DUL: Warning: Recreating file "dul.log"
Parameter altered
Parameter altered
Parameter altered
Parameter altered
. unloading table                      OBJ$    2681 rows unloaded
. unloading table                      TAB$     187 rows unloaded
. unloading table                      COL$   11181 rows unloaded
. unloading table                     USER$      23 rows unloaded
. unloading table                  TABPART$       0 rows unloaded
. unloading table                      IND$     221 rows unloaded
. unloading table                     ICOL$     419 rows unloaded
. unloading table                      LOB$      13 rows unloaded
Life is DUL without it
C:\dul>dul8.exe
Data UnLoader 8.0.6.8 - Internal Use Only - on Thu Jul 26 20:13:44 2012
with 64-bit io functions
Copyright (c) 1994/2000 Bernard van Duijnen All rights reserved.
DUL: Warning: Recreating file "dul.log"
Loaded 23 entries from USER.dat
Loaded 2681 entries from OBJ.dat
Loaded 188 entries from TAB.dat
Loaded 11218 entries from COL.dat
Loaded 0 entries from TABPART.dat
Loaded 221 entries from IND.dat
Loaded 13 entries from LOB.dat
Loaded 419 entries from ICOL.dat
DUL> unload table chf.t_xifenfei;
. unloading table                T_XIFENFEI     183 rows unloaded

启动8.0数据库

C:\oracle\ora80\BIN>SVRMGR30.EXE
Oracle Server Manager Release 3.0.5.0.0 - Production
(c) Copyright 1997, Oracle Corporation.  All Rights Reserved.
Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
SVRMGR> connect internal/xifenfei
Connected.
SVRMGR> startup
ORACLE instance started.
Total System Global Area                         15077376 bytes
Fixed Size                                          49152 bytes
Variable Size                                    12906496 bytes
Database Buffers                                  2048000 bytes
Redo Buffers                                        73728 bytes
Database mounted.
Database opened.

imp导入数据

C:\dul>imp chf/xifenfei file=dump001.dmp full=y
Import: Release 8.0.5.0.0 - Production on 星期二 11月 1 23:34:36 2011
(c) Copyright 2000 Oracle Corporation.  All rights reserved.
连接到: Oracle8 Release 8.0.5.0.0 - Production
PL/SQL Release 8.0.5.0.0 - Production
经由常规路径导出由EXPORT:V07.00.07创建的文件
警告: 此对象由 Bernard's DUL 导出, 而不是当前用户
. 正在将Bernard's DUL的对象导入到 CHF
. . 正在导入表                    "T_XIFENFEI"        183行被导入
成功终止导入，但出现警告。

测试恢复数据

SVRMGR> connect chf/xifenfei
Connected.
SVRMGR> select count(*) from t_xifenfei;
COUNT(*)
----------
       183
1 row selected.

再次证明了dul确实异常的强大,第三方的工具在某些方面确实不是它的对手