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Q113775: MS-DOS 6.21: Errors Restoring Compressed Backups

Article: Q113775
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.21
Operating System(s): 
Keyword(s): 
Last Modified: 20-NOV-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft MS-DOS operating system version 6.21 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you use an original equipment manufacturer (OEM) version of Microsoft
MS-DOS 6.21 Backup to restore backups created with an earlier version of
Microsoft Backup, you receive one of the following error messages:


MS-DOS 6.21 Backup (MS-DOS-Based Version)
-----------------------------------------

  Critical Error

  Cannot retrieve catalog <filename> from disk #1 in drive A.

  -or-

  Alert

  Compression failure within <filename>.

MS-DOS 6.21 Backup for Windows
------------------------------

  The compression header for the catalog is corrupt. Use rebuild to reconstruct
  the catalog.

  -or-

  The file <filename> could not be properly restored. Do you want to skip
  this file?

  -or-

  The compression header for the file <filename> is corrupt. Restore
  cannot process this file and must stop.

  -or-

  Cannot recover data from damaged diskette using error correction (ECC)

NOTE: This message is displayed when you try to retrieve or rebuild the backup
catalog.

CAUSE
=====

Compression code was removed from Microsoft Backup in MS-DOS 6.21. When you use
Microsoft Backup 6.21 to restore backups made with compression turned on, you
receive the errors noted above.

RESOLUTION
==========

If you are restoring backups made on another computer, re-create the backups
with compression turned off.

If you cannot re-create the backups, use the MS-DOS Expand utility (EXPAND.EXE)
to expand the required files (using the table below for reference) from the
original MS-DOS 6.0 or 6.2 disks.

Files Required for Microsoft Backup (MS-DOS-Based Version)
----------------------------------------------------------

  MSBACKDB.OVL
  MSBACKDR.OVL
  MSBACKFB.OVL
  MSBACKFR.OVL
  MSBACKUP.EX_    MSBACKUP.EXE
  MSBACKUP.HL_    MSBACKUP.HLP
  MSBACKUP.OVL
  MSBCONFG.HL_    MSBCONFG.HLP
  MSBCONFG.OVL

Files Required for Microsoft Backup for Windows
-----------------------------------------------

  MWBACKF.DL_     MWBACKF.DLL
  MWBACKR.DL_     MWBACKR.DLL
  MWBACKUP.EX_    MWBACKUP.EXE
  MWBACKUP.HL_    MWBACKUP.HLP
  MWGRAFIC.DL_    MWGRAFIC.DLL
  VFINTD.38_      VFINTD.386

MORE INFORMATION
================

To change the compression setting in Microsoft Backup 6.0 or 6.2:

1. Choose Backup.

2. Choose Options.

3. Clear the Compress Backup Data check box.

4. Choose OK.

Additional query words: 6.22 6.0 6.00 6.2 6.20 6.21 stop cancel restore ok yes no skip recreate

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621
Version           : MS-DOS:6.21

=============================================================================

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