Q

Repairing a dump file

A database dump was exported from Oracle 8.1.7.3 on Solaris 5.8 using the following characterset setting for v$_nlsparameters
 NLS_NCHAR_CHARACTERSET      WE8MSWIN1252
This dump was transferred through FTP in binary mode and imported on Oracle 9.2 on Windows 2000 server. The following error was shown:
 ------------------------------------------------------------------
 Import: Release 9.2.0.1.0 - Production on Fri Jul 23 17:15:13 2004
 Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
  
 Connected to: Oracle9i Enterprise Edition Release 9.2.0.1.0 -
 Production
 With the Partitioning, OLAP and Oracle Data Mining options
 JServer Release 9.2.0.1.0 - Production 
 Import file: EXPDAT.DMP > d:cp.dmp 
 Enter insert buffer size (minimum is 8192) 30720> 
 IMP-00010: not a valid export file, header failed verification
 IMP-00000: Import terminated unsuccessfully 
 --------------------------------------------------------------------
Is there any way by which I can repair the dump file? I found various tools on the Internet, like NXTract, but it failed. NXTsql only gives the table schema, but I also want the relationships and data.
I would redo the export. It is highly possible that the dump file is now corrupt, and I am not aware of any way to easily fix it. You can open the file with a binary editor and examine the contents, but this can be a very lengthy process. It is easier to redo the export.
This was first published in August 2004

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